河北省秦皇岛文华教育2013--2014学年度第一学期期末学情诊测试题九年级数学
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九年级(上)期末英语试卷一、单选题(本大题共20小题,共20.0分)1.-Lin Kai,hand in your homework,please.-Oh,sorry.I ______ it at home this morning.()A. was leavingB. has leftC. will leaveD. left2.-Is Richard still living here?-No, he_____ to London already.()A. movesB. movedC. will moveD. has moved3.-How do you improve speaking skills?- ________ to the tape and repeating.()A. By listeningB. By hearingC. ListenD. With listening4.- You look sad. What happened?- Everyone ____us to ___the match, but we lost.()A. expects; winB. expected; winC. expected; beatD. expects; beat5.My mother likes soft and gentle music. She says it ________ very nice.()A. tastesB. looksC. soundsD. feels6.-Does she like singing English songs?-Yes.She ____ to sing English songs in her room.()A. often hearsB. is often heardC. is often hearing7.There is _____ knocking at the door. Go and see who it is.()A. nobodyB. somebodyC. anybody8.Michael plays the guitar very well so we all ________ him.()A. hateB. believeC. agreeD. admire9.I wonder _____ you would like to go hiking with us this weekend.()A. thatB. whatC. if10.________disappointed she will be if she knows the result of the match!()A. HowB. WhatC. What aD. What an11.By reading the article,we know how ______ in our daily life.()A. will we protect the earthB. we can reduce pollutionC. should we save waterD. we must recycle things12.She didn't want to wake up her grandma, so she opened the door ________.()A. angrilyB. quietlyC. loudlyD. heavily13.Guangzhou is my hometown. It is one of ________ in China.()A. most beautiful cityB. the most beautiful cityC. most beautiful citiesD. the most beautiful cities14.-May I speak to Mrs.Black?-Sorry,mum can't come to the phone now.She a shower.()A. hasB. hadC. is havingD. was having15.-Would you like some tea?-______.()A. Yes,pleaseB. The same to youC. Me,tooD. My pleasure16.Paul is ________kind and friendly boy.()A. anB. theC. someD. a17.My English teacher is always strict ______us.()A. inB. atC. withD. about18.-- is the nearest hospital from here?--Er,it's about ten minutes'walk()A. How longB. How farC. How oftenD. How much19.I will go to the museum ________ bike.()A. by theB. by aC. by anD. by20.--How is your brother?--_________________.()A. How do you do?B. He's fine,thanksC. Thank you very much.D. I'm sorry.二、单词造句(本大题共5小题,共5.0分)21.把下列每组单词分别重新排序构成句子hair band it be could Mei's______.22.把下列每组单词分别重新排序构成句子movies kind of what like you do______ ?23.把下列每组单词分别重新排序构成句子tea China famous is for______.24.把下列每组单词分别重新排序构成句子used to he wear glasses______.25.把下列每组单词分别重新排序构成句子Tom harder works than me______.三、完形填空(本大题共10小题,共10.0分)根据短文内容,从A、B、C、D 四个选项中选出一个能填入相应空格内的最佳答案.I used to have little passion (激情)in my life.But what happened the other day changed my mind.Then I learned how(26) it is to have a passion in life.That day I went home in Mom's car.When Mom(27)at a red light,someone on the side of the road caught my eye.It was a man dressed in rags(破旧衣服).He was homeless.That didn't interest me(28)I had seen many people like him before.Those people usually looked unhappy and hopeless.But this man was (29) in some way.He was not sitting down with a(30)expression.Instead,he had a (31) in his hand and was dancing happily to the music.The radio seemed to be the most precious(珍贵)thing he had."Mom,why does that man have a radio though he's (32)?" I asked"He (33)it," she replied."But why doesn't he use the money to buy food or clothes?He (34)something that he didn't need." "Well,Sarah,sometimes food and clothes aren't the most important."That man must care so much about music that he bought a radio instead of food or clothes.I soon realized that (35)is the key to life.26. A. important B. strange C. dangerous D. difficult27. A. exercised B. walked C. stood D. stopped28. A. but B. when C. so D. because29. A. common B. polite C. different D. rude30. A. nervous B. sad C. mad D. happy31. A. hat B. phone C. radio D. scarf32. A. hopeful B. homeless C. careless D. useless33. A. bought B. made C. fixed D. borrowed34. A. asked for B. waited for C. paid for D. looked for35. A. happiness B. health C. knowledge D. friendship四、阅读理解(本大题共16小题,共30.0分)AMary likes eating.She eats much food every day and her favorite foods are hamburgers and ice cream.Mary doesn't like fruit or vegetables and she doesn't play sports.Now she is a really fat girl."Mary,you need to lose weight(减肥),"her friend Linda says to her."Don't eat too much,Mary," say her parents."Thank you,"says Mary."But I'm happy with how I look." One day Mary meets one of her father's friends William.He is a doctor."Mary,you really need to lose some weight.Being too fat is not good for your health.Some people die because of being too fat,"says the doctor."I don't want to die.I want to be healthy,"says Mary."It's time for me to lose weight now."36.What are Mary's favorite foods?______A. Fruit and icecream.B. Vegetables and fruit.C. Hamburgers and vegetables.D. Hamburgers and ice cream.37.Who is Linda?______A. Mary's friend.B. Mary's sister.C. Mary's father's friend.D. Mary's mother's friend.38.What's William's job?______A. A teacher.B. A doctor.C. A farmer.D. A driver.39.Mary wants to lose weight because ______ .A. she wants to be healthyB. she wants to look goodC. her parents ask her to do itD. her friend asks her to do itBMiss Hall,a beautiful and very successful actress was the star of a new musical show.Her home was in the country,but she didn't want to have to go back there every night,so she rented (租用)an expensive flat in the centre of the city,bought some beautiful furniture (家具)and hired a man to paint the rooms in new colors.It was very difficult to get tickets for her show because everybody wanted to see it,so she decided to give the painter two of the best seats.She hoped that this would make him work better for her.He took the tickets without saying anything,and she heard no more about them until the end of the month,when she got the painter's bill(账单).At the bottom of it were the words "Four hours watching Miss Hall sing and dance,3 dollars," She had to pay the painter 3 dollars for the two tickets.40.What did the actress hired a man to do?______A. To paint the rooms in new colorsB. To drive for herC. To watch her showD. To dance for her41.The actress gave the painter two tickets,hoping he would ______ .A. be pleasedB. ask less money for his workC. charge(收费)more money for his workD. say a good word for her musical show42.After the painter got the tickets from the actress,he ______ .A. sold them for £3B. went to watch the musical showC. paid £3 for themD. was very thankful to herCRunning is becoming popular these days.Many of us run for our health.Doctors say many of the healthproblems come from these bad habits:eating too much,drinking too much,smoking,and not taking enough exercise.Doctors tell us,"Eat and drink less,don't smoke,and exercise more."Running is a good form of exercise because it helps build a strong heart.It also helps most people loseweight.One 68-year-old woman runs three times a week.She runs to lose weight."I love to eat," she says.Running is good for health in other ways,too.Many runners say running keeps colds and other smallhealth problems away."Running is my doctor," says one man.Running can also help people lo relax.So today men and women of all ages enjoy running.43.Many people enjoy running because they want to ______ .A. eat muchB. keep healthyC. run fastD. waste time44.Doctors tell us ______ .A. not to smokeB. not to exerciseC. to drink muchD. to eat much45.The underlined word "weight" means ______ .A. 疾病B. 体重C. 速度D. 健康46.The third paragraph (段落)shows ______ .A. running helps people to relaxB. running people have many health problemsC. running helps build a strong heartD. running people have few health problems47.The writer mainly tells us ______ .A. how to runB. how to lose weightC. running is a good way to keep healthyD. running is better than doctorsDHannay was nervous.His enemies (敌人)were searching for him.All around him were grassy hills without trees.He had nowhere to hide.How could he escape?Hannay walked along the country for a long time.Then he saw a road worker,who was working alone,fixing the road.Hannay could see the road worker was not feelingwell.Hannay came up to him and said "How are you?""My head hurts," the worker said,"I can't do it.I want to go home to bed.My daughter got married yesterday,and I drank a lot of wine with my friends.That's the problem!" Hannay agreed that he should be home in bed."Yes,and I would be," he replied,"but yesterday I received a message saying that the new surveyor was coming to look at my work.If he comes and finds me away,I'll be in trouble." Suddenly Hannay had a bright idea--he could act as the road worker and get away from his enemies."You go off to bed," Hannay said,"I'll do your job until the new surveyor comes."The road worker was pleased with this idea.He gave Hannay his hat and his old coat.Then he went home to sleep and perhaps to drink a bit more.Hannay put on the worker's hat and coat and began to fix the road.About an hour later he heard a voice."Are you the road worker?" it asked.It was the new surveyor.He was a young man with a clean face.He sat in a small car.Hannay said yes.The surveyor told him about some work he wanted him to do before he came by again and drove off.Hannay continued with his work.Then a village boy came by."What has happened to the road worker?" he asked."He stayed at home today," Hannay replied."He's sick."At about midday,a large car came down the hill and stopped near Hannay.Three man got out of the car.Hannay's heart beat fast.He knew his enemies were coming…48.What is this passage probably taken from?______A. A history book.B. A travel book.C. A novel(小说).D. A science book.49.Why was the road worker feeling ill?______A. He had a cold.B. He hadn't eaten all day.C. He had been working all day.D. He drank too much at his daughter's wedding.50.Who did NOT come while Hannay was working on the road?______A. The surveyor.B. The road worker's daughter.C. Hannay's enemies.D. A village boy.51.What can we infer (推断)from the story?______A. Hannay helped the road worker because he was warm-hearted.B. The grassy hills were a perfect hiding place for Hannay.C. The surveyor had lot of working experience.D. The village boy knew the road worker.五、任务型阅读(本大题共1小题,共10.0分)52.读短文,完成问题We live in the "computer age".Today,it is more and more important for us to use computers.We use them at work,and we also use them at home.Both men and women,old and young use computers.We often use the mouse to run all the work.If you sit in front of a computer for a long time,you may feel painful and numb(麻木的)in your hand,your wrist,your shoulder,and your neck.What's wrong with you?The mouse is eating your body from your hand to all.Some researchers say we feel painful because we often repeat the same action-click.So we feel uncomfortable little by little.Nowadays,there are no good ways to solve this problem.The only way is to change the way we use the mouse and the keyboard(键盘).When at work,we should have a breakand exercise to keep our body healthy.判断正误(正确T,错误F)Computers are more and more important in our life.______回答问题What do people use to run all the work when they use computers?______How do people feel when they use computers for a long time?______完成句子We should ______ the way we use the mouse and the keyboard.把文中划线句子译成汉语______ .六、阅读填空(本大题共1小题,共5.0分)53.根据短文内容及所给提示,写出文中单词(或用所给单词的正确形式填空If you go to another country,what kinds of things would you buy?Would you buy a camera in Japan,some beautiful clothes in France,(1)o ______ a watch in Switzerland?No matter what you may buy,you might think those products were made(2)i ______ those countries.However,you could (1) (be)wrong.Kang Jian is a 17-year-old student from Shanghai.Last year he went to visit (2) (he)aunt and uncle in SanFrancisco.He (3) (find)it interesting that so many products in the local shops were made in China.七、书面表达(本大题共1小题,共10.0分)54.假设你是赵明,你班同学Robert患病住院已有两周,请用英文写一封电子邮件,主要内容包括:(1)询问病情(2)介绍近期班级活动:参加了运动会,并获奖;现在正准备歌咏比赛.(3)表达祝愿.注意:词数80左右;可以适当增加细节,以使行文连贯;邮件的格式已给出提示词语:miss sports meeting win first prize exciting practise worryDear Robert,It's two weeks since you got ill.Best wishesYours,Zhao Ming答案和解析1.【答案】D【解析】答案D 本题是考查时态的题目.根据句中时间状语this morning表示过去的时间,可知用一般过去时态,谓语动词用过去式,leave的过去式是left,故选D.-林凯,请交上你的作业.-对不起,今天早上我把它忘在家里了.本题是考查时态的题目,每一种特定的时态都有其相应的时态标志,寻找其时态标志并加以认真分析可以巧解时态试题.本题的时间状语是this morning,在做题时若能充分利用这些时态标志,同时结合句子语境,就可很快选出正确答案.2.【答案】D【解析】根据 he_____ to London already,可知这里already用于现在完成时,构成have/has+动词的过去分词.故选:D.--Richard还住在这里吗?--不,他已经搬到伦敦去了.熟悉现在完成时的基本用法,结合选项给出答案.3.【答案】A【解析】根据句意:-你如何提高口语技巧?-通过听磁带并重复.可知考查by doing sth 通过某种方式做某事.故选:A.-你如何提高口语技巧?-通过听磁带并重复.熟悉介词短语的基本用法,结合题意,给出答案.4.【答案】B【解析】希望某人做某事expect sb.to do sth.,win赢,beat打败,战胜;根据句意"你看起来很难过.发生什么事了?每个人都希望我们赢得这场比赛,但我们输了"可知,要用一般过去时.故选:B.--你看起来很难过.发生什么事了?--每个人都希望我们赢得这场比赛,但我们输了.考查动词短语,要牢记动词短语的词意及用法,进行比较分析,选择正确答案.5.【答案】C【解析】taste品尝,look看起来,sound听起来,feel感觉;根据句意"妈妈喜欢轻柔的音乐.她说听起来很好"可知,要用"听起来",其它选项语意不通.故选:C.我妈妈喜欢轻柔的音乐.她说听起来很好.考查动词词意辨析,要牢记动词的词意及用法,进行比较分析,选择正确答案.6.【答案】B【解析】答案:B.根据She ____ to sing English songs in her room,可知这里叙述一件事实,时态用一般现在时,而she是动作的承受者,应该用被动语态,句子使用一般现在时的被动语态,构成am/is/are+及物动词的过去分词.故选B.--她喜欢唱英文歌吗?--是的,经常听到她在房间里唱英文歌曲.主要考查被动语态,当句子的主语是动作的承受者时,应该用被动语态,本题考查的是一般现在时态的被动语态.一定注意其构成形式,一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.7.【答案】B【解析】anybody是任何人,常用于否定句和疑问句中;nobody是没有人;somebody是一些人,有些人,常用于肯定句中;三者是不定代词.由题干"有人正在敲门.去看看它是谁."可知,空格是"有人",用somebody,因此答案应是somebody.故选:B.有人正在敲门.去看看它是谁.本题考查了不定代词的用法,在熟知所供词的含义基础上,根据句意,从而判断出正确答案.8.【答案】D【解析】hate恨,不喜欢,believe相信,agree同意,admire羡慕,佩服;根据句意"迈克尔吉他弹得很好,所以我们都很佩服他"可知,要用"佩服",其它选项语意不通.故选:D.迈克尔吉他弹得很好,所以我们都很佩服他.考查动词词意辨析,要牢记动词的词意及用法,进行比较分析,选择正确答案.9.【答案】C【解析】答案:C.根据I wonder _____ you would like to go hiking with us this weekend,可知这里wonder表示想知道,含有疑问的口气,用if引导,表示是否.故选C.我想知道这个周末你是否愿意和我们一起去远足.熟悉连词的基本意义和用法,结合题意,给出答案.10.【答案】A【解析】根据disappointed she will be if she knows the result of the match,可知考查感叹句,what修饰名词,how修饰形容词/副词,disappointed是形容词,用how修饰,句型结构为:how+形容词/副词+主语+谓语动词!故选:A.如果她知道比赛结果,她会多么失望!熟悉感叹句的基本用法,结合题意,给出答案.11.【答案】B【解析】答案:B 根据 how ______ in our daily life.可知这是how引导的宾语从句,宾语从句中应该用陈述语序,即主语+谓语,所以排除A,C.选项D.we must recycle things,我们必须回收东西,放在句中,句意不通.故选:C.句意:通过阅读这篇文章,我们知道在我们的日常生活中怎样能减少污染.主要考查宾语从句,在做此类题目时,应该注意宾语从句的连接词,以及宾语从句的时态和语序问题,掌握好这几点,是做好此类题目的关键.本题主要考查宾语从句的引导词和语序.12.【答案】B【解析】angrily生气地;quietly安静地;loudly大声地;heavily重地.根据She didn't want to wake up her grandma, so she opened the door --,可知她不想吵醒奶奶,所以她悄悄地开门.故选:B.她不想吵醒奶奶,所以她悄悄地开门.此题考查副词词义辨析,在熟知副词意思和用法的基础上,结合具体题目,仔细分析,便可得出正确答案.13.【答案】D【解析】根据句意:广州是我的家乡.它是中国的最美丽的城市之一.可知考查句型one of the+形容词最高级+名词复数,表示最…之一.故选:D.广州是我的家乡.它是中国的最美丽的城市之一.熟悉名词短语的基本用法,结合题意,给出答案.14.【答案】C【解析】答案:C.根据Sorry,mum can't come to the phone now说明了妈妈不能来接电话因为她在冲凉,now此刻,现在,一般用于现在进行时当中,因此该句用现在进行时,现在进行时的构成:主语+is/am/are+动词的ing+…,主语是she,故答案为:is having,故选C.--我可以和布莱克夫人通话吗?--抱歉,妈妈现在不能来接电话.她在冲凉.本题旨在考查现在进行时,now是判断时态的关键词,类似的常见特征词还有:Look,Listen,It's seven o'clock now.现在进行时的构成:主语+is/am/are+动词的ing+….15.【答案】A【解析】答案:A.首先明确各选项中句子的意思,A:是的;B:你也是;C:我也是;D:不客气;根据语境Would you like some tea?可以判断本题考查对Would you like some …?的回答.肯定回答用:Yes,please,.否定回答用:No,thanks.故选A.--你想喝茶吗?--是的.在把握话题和语境的基础上,针对对话的设空处,细读所提供的选项,认真分析它们之间的异同,依据有关情景内容,选择正确的答案.16.【答案】D【解析】a,an,the三者都是冠词,a,an 是不定冠词,放在单数可数名词前面,表示某类人或事物中的"一个、一名",表泛指,a用于以辅音音素开头的字母或单词前、an用于以元音音素开头的字母或单词前.the 是定冠词,表特指,意为"这、那、这些、那些".放在可数名词和不可数名词前.由题干保罗是一个善良友好的男孩."可知,"一个善良友好的男孩."表泛指,"一个",用不定冠词,因kind是以辅音音素开头的单词,因此空格用a,所以答案应是a.故选:D.保罗是一个善良友好的男孩.本题考查了不定冠词的用法,在熟知所供词的含义基础上,根据句意,从而判断出正确答案.17.【答案】C【解析】考查动词短语.A在…里.B在几点.C和…D关于.句意"我的英语老师对我们总是很严格.".be strict with sb对某人要求严格.固定搭配.故选:C.我的英语老师对我们总是很严格.考查动词短语,在日常学习中要积累一些动词短语的固定用法,结合语境,选择合适的搭配.完成试题.18.【答案】B【解析】答案:B.考查疑问词组.句意"--离这儿最近的医院有多远?--呃,步行大约需要十分钟.".how long多久,对一段时间或长度提问.how far多远,对距离提问.how often多久,对频率提问.how much多少钱.根据回答"步行大约需要十分钟.",可知,对距离、路程提问用疑问词组how far多远.选B.--离这儿最近的医院有多远?--呃,步行大约需要十分钟.疑问词组通常用来构成疑问句,要根据回答的具体内容进行选择,注意一些固定搭配,分清疑问词的用法.19.【答案】D【解析】by "通过"是方式介词,by+"交通工具"表示交通方式,by bike "骑自行车",中间不加任何成分.不用冠词,因此答案A、B、C在此题中都不正确.由题干"我骑自行车去博物馆."可知,空格用by ,因此答案应是by.故选:D.我骑自行车去博物馆.本题考查方式介词的辨析,在熟知所供词的含义基础上,根据句意,从而判断出正确答案.20.【答案】B【解析】考查情境对话.A.How do you do?你好!B.He's fine,thanks他很好,谢谢.C.Thank you very much.非常感谢.D.I'm sorry.对不起.根据How is your brother?可知应说他很好,谢谢.故选:B.你弟弟好吗?他很好,谢谢.首先迅速的浏览一遍对话,根据对话的情境,How is your brother?结合选项作答.21.【答案】It could be Mei's hair band【解析】首先结合提示词和标点符合明确所要组合的句子是一个陈述句,组合成的句子的句意是"可能是梅的发带.",句子含有情态动词could,后面跟动词原形.故答案为:It could be Mei's hair band.It could be Mei's hair band.可能是梅的发带.做连词成句这种类型的题,首先确定句子类型,如:陈述句、疑问句或感叹句等,然后根据所给单词,明确主语、谓语等句子成分,在确定句意的前提下结合语法知识组合句子.22.【答案】What kind of movies do you like【解析】首先结合提示词和标点符合明确所要组合的句子是一个特殊疑问句,组合成的句子的句意是"你喜欢什么类型的电影.",句子叙述一件事实,时态用一般现在时,What kind of movies 什么类型的电影.故答案为:What kind of movies do you like?What kind of movies do you like?你喜欢什么类型的电影?做连词成句这种类型的题,首先确定句子类型,如:陈述句、疑问句或感叹句等,然后根据所给单词,明确主语、谓语等句子成分,在确定句意的前提下结合语法知识组合句子.23.【答案】China is famous for tea【解析】首先结合提示词和标点符合明确所要组合的句子是一个陈述句,组合成的句子的句意是"中国以茶叶闻名.",句子叙述一件事实,时态用一般现在时,be famous for表示以…而闻名.故答案为:China is famous for tea.China is famous for tea.中国以茶叶闻名.做连词成句这种类型的题,首先确定句子类型,如:陈述句、疑问句或感叹句等,然后根据所给单词,明确主语、谓语等句子成分,在确定句意的前提下结合语法知识组合句子.24.【答案】He used to wear glasses【解析】首先结合提示词和标点符合明确所要组合的句子是一个陈述句,组合成的句子的句意是"他以前戴眼镜.",句子叙述过去的事情,时态用一般过去时,used to do sth表示过去常常做某事,wear glasses表示戴眼镜.故答案为:He used to wear glasses.He used to wear glasses.他以前戴眼镜.做连词成句这种类型的题,首先确定句子类型,如:陈述句、疑问句或感叹句等,然后根据所给单词,明确主语、谓语等句子成分,在确定句意的前提下结合语法知识组合句子.25.【答案】Tom works harder than me【解析】首先结合提示词和标点符合明确所要组合的句子是一个陈述句,组合成的句子的句意是"汤姆比我工作更努力.",句子叙述一件事实,时态用一般现在时,这里than用于比较级形式.故答案为:Tom works harder than me.Tom works harder than me.汤姆比我工作更努力.做连词成句这种类型的题,首先确定句子类型,如:陈述句、疑问句或感叹句等,然后根据所给单词,明确主语、谓语等句子成分,在确定句意的前提下结合语法知识组合句子.26.【答案】【小题1】A 【小题2】D 【小题3】D 【小题4】C 【小题5】B【小题6】C 【小题7】B 【小题8】A 【小题9】C 【小题10】A【解析】1-5:ADDCB :6-10:CBACA1.A 考查形容词及语境的理解.A.重要的;B.陌生的;C.危险的;D.困难的,根据it is to have a passion in life结合常识可知激情在生命当中是多么的重要,故选择A.2.D 考查连词及语境的理解.A.锻炼;B.步行;C.站立;D.停止,根据后面at a red light红灯时,可知停下来等红灯的时候,故选择D.3.D 考查介词及语境的理解.A但是;B当…时;C所以;D因为;根据 That didn't interest me(3)I had seen many people like him before.我不感兴趣.我以前见过很多像他这样的人.因果关系,故选择D.4.C 考查形容词及语境的理解.A.普通的;B.有礼貌的;C.不同的;D.粗鲁的,根据前文Those people usually looked unhappy and hopeless那些人通常看起来很不高兴和绝望.可知他是不同的,故选择C.5.B 考查形容词及语境的理解.A.紧张的;B.悲伤的;C.疯狂的;D.开心的,根据前文与别人不同,应该He was not sitting down with a(5)expression是没有悲伤的表情,故选择B.6.C 考查名词及语境的理解.A.帽子;B.电话;C.广播;录音机;D.围巾,根据后文was dancing happily to the music.随着音乐开心地跳着舞,可知他手里有收音机,故选择C.7.B 考查形容词及语境的理解.A.充满希望的;B.无家可归的;C.粗心的;D无用的,根据上文 homeless可知是问为什么无家可归,故选择B.8.A 考查动词及语境的理解.A.买;B.制作;C.修理;D.借,根据下句why doesn't he use the money to buy food or clothes?为什么不用钱买食物和衣服,可知答语是他买的,故选择A.9.C 考查固定短语及语境的理解.A.要求;B.等待;C.支付;D.寻找,根据why doesn't he use the money to buy food or clothes?可为什么不用钱买食物和衣服知是支付一些不需要的东西,故选择C.10.A 考查名词及语境的理解.A.开心;B.健康;C.知识;D.友谊,根据I soon realized that (10)is the key to life及对文章内容的理解及句意我很快的意识到开心是生命的钥匙,可知选择A.这篇短文主要讲述了激情在人生命当中的重要性这篇短文主要讲述了激情在人生命当中的重要性.通过看见无家可归的人最后领悟到生命中最重要的是什么.考查完型填空.根据所给的短文对意思有所了解,然后根据短文的大体意思,选择每个符合题意的答案,使短文更通顺.36.【答案】【小题1】D 【小题2】A 【小题3】B 【小题4】A【解析】1.D.细节理解题.根据第一段She eats much food every day and her favorite foods are hamburgers and ice cream她最喜欢的食物是汉堡包和冰淇淋.可知,Mary最喜欢的食物应该是"汉堡包和冰淇淋".故选D.2.A.细节理解题.根据第二段"Mary,you need to lose weight(减肥),"her friend Linda says to her."Mary,你需要减肥,"她的朋友Linda对她说.可知,Linda是Mary的朋友.故选A.3.B.细节理解题.根据第三段One day Mary meets one of her father's friends William.He is a doctor有一天Mary遇到了她父亲的一个朋友William,他是一名医生.可知,William是医生.故选B.4.A.细节理解题.根据最后一段"I don't want to die.I want to be healthy,"says Mary."It's time for me to lose weight now.""我不想死,我想保持健康,"玛丽说,"现在是我减肥的时候了."可知,Mary想减肥是因为她想保持健康.故选A.这是一篇人物故事类阅读,主要介绍Mary最喜欢的食物是汉堡包和冰淇淋.她不喜欢水果和蔬菜,也不运动,现在她很胖.父亲和朋友都劝她减肥,她都不在意,直到医生说你太胖了可能会死去,她才下定决心减肥.阅读题型,段落与段落之间逻辑关系以及对篇章的整体理解.看不懂的词跳过,根据上下文猜意思,掌握一些常识.根据问题,找到关键语句,选择正确答案.40.【答案】【小题1】A 【小题2】A 【小题3】B【解析】1:A 细节理解题.根据第一段so she rented (租用) an expensive flat in the centre of the city, bought some beautiful furniture (家具) and hired a man to paint the rooms in new colors.于是她租了一栋昂贵的公寓,并请来一个粉刷工为她粉刷墙壁,可知雇了一个人是为了把房间涂上新颜色,故选择A.2:A 推理判断题.根据第二段She hoped that this would make him work better and more willingly for her."她希望这样能使他更好的工作并更愿意为她工作."可知,是为了是他更高兴.故选A.3:B 推理判断题.根据第二段At the bottom of it were the words "Four hours watching Miss Hall sing and dance,3 dollars," She had to pay the painter 3 dollars for the two tickets.最下面是"看Hall小姐唱歌跳舞四个小时,三美元",她得付油漆工三美元买两张票可知,他拿到票就去看演唱会了.故选B.本文介绍一个非常成功漂亮的女演员与一个粉刷匠的故事.本文是一篇人物故事类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.43.【答案】【小题1】B 【小题2】A 【小题3】B 【小题4】D 【小题5】C 【解析】1:B.细节理解题.根据文章Many of us run for our health很多人跑步为了健康.故选B.2:A.细节理解题.根据文章Doctors tell us,"Eat less,don"t smoke,and exercise more."医生告诉我们要少吃,不要抽烟,多多锻炼.故选A.3:B.词义猜测题.根据文章It also helps most people lose weight.跑步也能帮助很多人减轻体重.故选B.。
2013-2014学年第一学期九年级英语期末考试2014. 01注意事项:1. 本试题分两部分。
考试时间为120分钟。
试卷满分为110分。
2. 所有答案必须写在答题卷各题目指定区域内相应位置上。
答案写在试卷其它部分无效。
第Ⅰ卷客观题(共70分)一、听力测试(本大题共20小题,每小题各1分,共20分)二、单项选择在A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
(本大题共14小题,每小题1分,共14分)21. I don’t make ________ clear when and where the parents’ meeting will be held.A. thisB. thatC. thoseD. it22. ________ Mary ________ Jack is listening to the report carefully, because they are both interested init very much.A. Neither; norB. Either; orC. Both; andD. Not only; but also23. — Do you have any plans for the winter holiday?— Since you are crazy about music, why not go to some ________ concerts?A. livelyB. liveC. aliveD. living24. The cost of living in Chengdu is among the lowest in China, ________ the quality of life is probablyone of the highest.A. sinceB. whenC. asD. while25. — What do you think of the young lady?— She is hard-working. She ________ all her effort into her work before she got ill.A. has putB. putC. had putD. would put26. Boris has brain. In fact, I don’t think that anyone in the class has ________ IQ.A. a highB. a higherC. the higherD. the highest27. Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerous.A. mustn’tB. ought not toC. needn’tD. don’t have to28. — I’m new in Wuxi.— Take a map of Wuxi with you. You’ll find it of great ________ in helping you to get round Wuxi.A. priceB. costC. interestD. importance29. Having ________ exercise every day will do great good to your health.A. a lotB. a number ofC. too muchD. plenty of30. He made a mistake, but then he took action to change the situation ________ it got worse.A. untilB. whenC. beforeD. because31. The radio says that a terrible traffic accident happened sometime ________ 8 a.m. ________ 10 a.m.this morning.A. between; andB. from; toC. between; toD. from; and32. You had better ________ some time every day for sports so that you can keep yourself energetic.A. spendB. takeC. spareD. give33. Our headmaster isn’t in his office. I can’t find him anywhere. Did you notice him ______ the office?A. to enterB. enterC. to leaveD. leave34. — How was your interview with the boss?— ________. He seemed interested in my experience, but he didn’t ask for my recommendation letter.A. PerfectB. I’m not sureC. That’s rightD. Couldn’t be better三、完形填空先通读下面的短文,掌握其大意,然后在每小题所给的四个选项中,选出可以填入空白处的最佳选项。
河北省秦皇岛市九年级上学期语文期末考试试卷姓名:________ 班级:________ 成绩:________一、选择题 (共3题;共6分)1. (2分) (2017七上·商城期中) 下列词语中没有错别字的一项是()A . 目不转睛高不可攀浮想联翩宽弘大量B . 各得其所人迹罕至肃然起敬高入云宵C . 恍然大悟鸦雀无声小心翼翼心惊肉跳D . 欣欣向荣人声鼎沸坚强不曲花团锦簇2. (2分)(2019·广东模拟) 下列对病句的修改不正确的一项是()A . 湛江作为宜居城市,少了其他一些大城市的喧嚣和拥挤。
合理的城市规划,给市民以舒适和便利,让人们内心感到由衷喜悦和惬意。
(删去“内心”或“由衷”)B . 为了防止今后再发生类似恶性事故,有关部门进一步提高了安全生产措施。
(“提高”改为“完善”)C . 袁隆平为研究杂交水稻技术而不畏艰险、执著追求的精神和品质是值得我们学习的榜样。
(把“不畏艰险”和“执著追求”对调)D . 面对叙利亚小难民艾兰伏尸海滩的照片,使欧欧洲一些国家终于松,允许更多难民入境。
(删去“面对”或“使”)3. (2分)下面对作者描述不正确的一项是()A . 普希金,俄罗斯文学的开创者,他的《假如生活欺骗了你》既是对小沃尔夫的安慰,又是自己人生的座右铭,全诗洋溢着一种乐观向上的生活情调。
B . 莫泊桑,法国十九世纪后半期批判现实主义作家,《项链》一文塑造了一位爱慕虚荣,“一夜欢乐换来十年艰辛”的人物形象——玛蒂尔德。
C . 茹志鹃,生于1925年,卒于1998年,当代著名女作家,她的《百合花》塑造了一位热心好客的新媳妇的形象。
D . 欧阳修,唐宋八大家之一,曾是苏轼的老师,《醉翁亭记》描写了醉翁亭周围环境及太守与客人游览醉翁亭的经过,表现了与民同乐的思想。
二、综合性学习 (共2题;共5分)4. (4分)(2012·宁波) 下面是摘自网络的一段文字,根据要求完成题目。
2013—2014学年度上学期期末质量检测九年级英语试卷(分值:120分 答卷时间:120分钟)一、听力部分(共20分)Ⅰ. 听句子, 选出该句的最佳应答语。
(5分)分)( ) 1. A. I want to be a singer.B. I like swimming.C. I’d love to go to the park. ( ) 2. A. I would call the police.B. I often help the poor people.C. I’m going to be a famous doctor. ( ) 3. A. Yes, I used to wear glasses. B. No, I had short hair. C. No, I had a nice hat. ( ) 4. A. My sister is twelve.B. She has a cool watch.C. The one in red. ( ) 5. A. She went there by bus. B. She had a blue car.C. Her grandparents stayed at home. Ⅱ. 听对话及问题,选择最佳答案。
(5分)分) () 6. Why is the radio so lond? A. Because the boy likes loud music.B. Because the boy is holding a party.C. Because there’s something wrong with it. () 7. What is the money for? A. For a book. B. For a ticket. C. For a watch. () 8. Where is the hotel? A. Behind the bank. B. Across from the bank. C. Next to the bank. () 9. Where will Tom go on business? A. To Canada. B. To America. C. To Australia. ()10. What does the girl want to do? A. To play football. B. To do her homework. C. To go to the cinema. Ⅲ. 图片理解图片理解看图听描述,选择与你所听到的描述内容相符合的图片。
九年级上册秦皇岛数学期末试卷测试卷(含答案解析)一、选择题1.有一组数据5,3,5,6,7,这组数据的众数为( ) A .3 B .6 C .5D .72.一元二次方程x 2=-3x 的解是( )A .x =0B .x =3C .x 1=0,x 2=3D .x 1=0,x 2=-33.已知点O 是△ABC 的外心,作正方形OCDE ,下列说法:①点O 是△AEB 的外心;②点O 是△ADC 的外心;③点O 是△BCE 的外心;④点O 是△ADB 的外心.其中一定不成立的说法是( ) A .②④B .①③C .②③④D .①③④4.在一个不透明的口袋中装有3个红球和2个白球,它们除颜色不同外,其余均相同.把它们搅匀后从中任意摸出1个球,则摸到红球的概率是( ) A .14B .34C .15D .355.二次函数2y ax bx c =++(a ,b ,c 为常数,且0a ≠)中的x 与y 的部分对应值如下表:以下结论:①二次函数2y ax bx c =++有最小值为4-; ②当1x <时,y 随x 的增大而增大;③二次函数2y ax bx c =++的图象与x 轴只有一个交点;④当13x 时,0y <.其中正确的结论有( )个A .1B .2C .3D .46.点P 1(﹣1,1y ),P 2(3,2y ),P 3(5,3y )均在二次函数22y x x c =-++的图象上,则1y ,2y ,3y 的大小关系是( ) A .321y y y >>B .312y y y >=C .123y y y >>D .123y y y =>7.如图,在⊙O 中,AB 为直径,圆周角∠ACD=20°,则∠BAD 等于( )A .20°B .40°C .70°D .80°8.小明同学发现自己一本书的宽与长之比是黄金比约为0.618.已知这本书的长为20cm ,则它的宽约为( ) A .12.36cmB .13.6cmC .32.386cmD .7.64cm9.如图,AB ,AM ,BN 分别是⊙O 的切线,切点分别为 P ,M ,N .若 MN ∥AB ,∠A =60°,AB =6,则⊙O 的半径是( )A .32B .3C .323 D .310.若关于x 的一元二次方程x 2﹣2x +a ﹣1=0没有实数根,则a 的取值范围是( ) A .a <2B .a >2C .a <﹣2D .a >﹣211.受益于电子商务发展和法治环境改普等多重因素,“快递业”成为我国经济发展的一匹“黑马”,2018年我国快递业务量为600亿件,预计2020年快递量将达到950亿件,若设快递平均每年增长率为x ,则下列方程中,正确的是( ) A .600(1+x )=950 B .600(1+2x )=950 C .600(1+x )2=950 D .950(1﹣x )2=600 12.若二次函数y =x 2+4x +n 的图象与x 轴只有一个公共点,则实数n 的值是( )A .1B .3C .4D .6二、填空题13.如图,已知Rt ABC ∆中,90ACB ∠=︒,8AC =,6BC =,将ABC ∆绕点C 顺时针旋转得到MCN ∆,点D 、E 分别为AB 、MN 的中点,若点E 刚好落在边BC 上,则sin DEC ∠=______.14.在一块边长为30 cm 的正方形飞镖游戏板上,有一个半径为10 cm 的圆形阴影区域,则飞镖落在阴影区域内的概率为__________.15.设1x ,2x 是关于x 的一元二次方程240x x +-=的两根,则1212x x x x ++=______. 16.如图,四边形ABCD 内接于⊙O ,AB 是⊙O 的直径,过点C 作⊙O 的切线交AB 的延长线于点P ,若∠P =40°,则∠ADC =____°.17.如图,在Rt △ABC 中,BC AC ⊥,CD 是AB 边上的高,已知AB =25,BC =15,则BD =__________.18.如图,已知正方ABCD 内一动点E 到A 、B 、C 三点的距离之和的最小值为13+,则这个正方形的边长为_____________19.如图,在矩形ABCD 中,AB=2,BC=4,点E 、F 分别在BC 、CD 上,若AE=5,∠EAF=45°,则AF 的长为_____.20.两个相似三角形的面积比为9:16,其中较大的三角形的周长为64cm ,则较小的三角形的周长为__________cm .21.△ABC 是等边三角形,点O 是三条高的交点.若△ABC 以点O 为旋转中心旋转后能与原来的图形重合,则△ABC 旋转的最小角度是____________.22.如图,AB 是⊙O 的直径,弦BC=2cm ,F 是弦BC 的中点,∠ABC=60°.若动点E 以2cm/s 的速度从A 点出发沿着A ⇒B ⇒A 方向运动,设运动时间为t (s )(0≤t <3),连接EF ,当t 为_____s 时,△BEF 是直角三角形.23.若函数y =(m +1)x 2﹣x +m (m +1)的图象经过原点,则m 的值为_____. 24.如图,在△ABC 中,AC :BC :AB =3:4:5,⊙O 沿着△ABC 的内部边缘滚动一圈,若⊙O 的半径为1,且圆心O 运动的路径长为18,则△ABC 的周长为_____.三、解答题25.如图,Rt △FHG 中,∠H=90°,FH ∥x 轴,=0.6GHFH,则称Rt △FHG 为准黄金直角三角形(G 在F 的右上方).已知二次函数21y ax bx c =++的图像与x 轴交于A 、B 两点,与y轴交于点E (0,3-),顶点为C (1,4-),点D 为二次函数22(1)0.64(0)y a x m m m =--+->图像的顶点.(1)求二次函数y 1的函数关系式;(2)若准黄金直角三角形的顶点F 与点A 重合、G 落在二次函数y 1的图像上,求点G 的坐标及△FHG 的面积;(3)设一次函数y=mx+m 与函数y 1、y 2的图像对称轴右侧曲线分别交于点P 、Q. 且P 、Q 两点分别与准黄金直角三角形的顶点F 、G 重合,求m 的值并判断以C 、D 、Q 、P 为顶点的四边形形状,请说明理由.26.下表是某地连续5天的天气情况(单位:C ︒):日期 1月1日 1月2日 1月3日 1月4日 1月5日 最高气温 5 7 6 8 4 最低气温-2-213(1)1月1日当天的日温差为______C ︒(2)利用方差判断该地这5天的日最高气温波动大还是日最低气温波动大.27.如图,已知抛物线经过原点O ,顶点为A(1,1),且与直线-2y x =交于B ,C 两点. (1)求抛物线的解析式及点C 的坐标; (2)求△ABC 的面积;(3)若点N 为x 轴上的一个动点,过点N 作MN ⊥x 轴与抛物线交于点M ,则是否存在以O ,M ,N 为顶点的三角形与△ABC 相似?若存在,请求出点N 的坐标;若不存在,请说明理由.28.如图,在平面直角坐标系中,一次函数13y x =-的图像与x 轴交于点A .二次函数22y x bx c =-++的图像经过点A ,与y 轴交于点C ,与一次函数13y x =-的图像交于另一点()2,B m -.(1)求二次函数的表达式;(2)当12y y >时,直接写出x 的取值范围;(3)平移AOC ∆,使点A 的对应点D 落在二次函数第四象限的图像上,点C 的对应点E 落在直线AB 上,求此时点D 的坐标. 29.解方程: (1)x 2+4x ﹣21=0(2)x2﹣7x﹣2=030.如图,已知抛物线y1=﹣12x2+32x+2与x轴交于A、B两点,与y轴交于点C,直线l是抛物线的对称轴,一次函数y2=kx+b经过B、C两点,连接AC.(1)△ABC是三角形;(2)设点P是直线l上的一个动点,当△PAC的周长最小时,求点P的坐标;(3)结合图象,写出满足y1>y2时,x的取值范围.31.如图,在平面直角坐标系中,二次函数y=x2+bx+c的图象与x轴相交于点A、B,与y 轴相交于点C,B点的坐标为(6,0),点M为抛物线上的一个动点.(1)若该二次函数图象的对称轴为直线x=4时:①求二次函数的表达式;②当点M位于x轴下方抛物线图象上时,过点M作x轴的垂线,交BC于点Q,求线段MQ的最大值;(2)过点M作BC的平行线,交抛物线于点N,设点M、N的横坐标为m、n.在点M运动的过程中,试问m+n的值是否会发生改变?若改变,请说明理由;若不变,请求出m+n 的值.32.中国古代有着辉煌的数学成就,《周髀算经》,《九章算术》,《海岛算经》,《孙子算经》等是我国古代数学的重要文献.(1)小聪想从这4部数学名著中随机选择1部阅读,则他选中《九章算术》的概率为;(2)某中学拟从这4部数学名著中选择2部作为“数学文化”校本课程学习内容,求恰好选中《九章算术》和《孙子算经》的概率.【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【分析】根据众数的概念求解.【详解】这组数据中5出现的次数最多,出现了2次,则众数为5.故选:C.【点睛】本题考查了众数的概念:一组数据中出现次数最多的数据叫做众数.2.D解析:D【解析】【分析】先移项,然后利用因式分解法求解.【详解】解:(1)x2=-3x,x2+3x=0,x(x+3)=0,解得:x1=0,x2=-3.故选:D.【点睛】本题考查了解一元二次方程-因式分解法,熟练掌握因式分解的方法是解题的关键.3.A解析:A【解析】【分析】根据三角形的外心得出OA=OC=OB,根据正方形的性质得出OA=OC<OD,求出OA=OB=OC=OE≠OD,再逐个判断即可.【详解】解:如图,连接OB、OD、OA,∵O 为锐角三角形ABC 的外心, ∴OA =OC =OB , ∵四边形OCDE 为正方形, ∴OA =OC <OD , ∴OA =OB =OC =OE ≠OD ,∴OA =OC ≠OD ,即O 不是△ADC 的外心, OA =OE =OB ,即O 是△AEB 的外心, OB =OC =OE ,即O 是△BCE 的外心, OB =OA ≠OD ,即O 不是△ABD 的外心, 故选:A . 【点睛】本题考查了正方形的性质和三角形的外心.熟记三角形的外心到三个顶点的距离相等是解决此题的关键.4.D解析:D 【解析】 【分析】根据题意即从5个球中摸出一个球,概率为35. 【详解】 摸到红球的概率=33235=+, 故选:D. 【点睛】此题考查事件的简单概率的求法,正确理解题意,明确可能发生的总次数及所求事件发生的次数是求概率的关键.5.B解析:B 【解析】 【分析】根据表中数据,可获取相关信息:抛物线的顶点坐标为(1,-4),开口向上,与x 轴的两个交点坐标是(-1,0)和(3,0),据此即可得到答案. 【详解】①由表格给出的数据可知(0,-3)和(2,-3)是一对对称点,所以抛物线的对称轴为202+=1,即顶点的横坐标为x=1,所以当x=1时,函数取得最小值-4,故此选项正确; ②由表格和①可知当x <1时,函数y 随x 的增大而减少;故此选项错误;③由表格和①可知顶点坐标为(1,-4),开口向上,∴二次函数2y ax bx c =++的图象与x 轴有两个交点,一个是(-1,0),另一个是(3,0);故此选项错误;④函数图象在x 轴下方y<0,由表格和③可知,二次函数2y ax bx c =++的图象与x 轴的两个交点坐标是(-1,0)和(3,0),∴当13x 时,y<0;故此选项正确;综上:①④两项正确, 故选:B . 【点睛】本题综合性的考查了二次函数的性质,解题的关键是能根据二次函数的对称性判断:纵坐标相同两个点的是一对对称点.6.D解析:D 【解析】试题分析:∵22y x x c =-++,∴对称轴为x=1,P 2(3,2y ),P 3(5,3y )在对称轴的右侧,y 随x 的增大而减小,∵3<5,∴23y y >,根据二次函数图象的对称性可知,P 1(﹣1,1y )与(3,2y )关于对称轴对称,故123y y y =>,故选D . 考点:二次函数图象上点的坐标特征.7.C解析:C 【解析】 【分析】连接OD ,根据∠AOD =2∠ACD ,求出∠AOD ,利用等腰三角形的性质即可解决问题. 【详解】 连接OD .∵∠ACD =20°,∴∠AOD =2∠ACD =40°. ∵OA =OD ,∴∠BAD =∠ADO =12(180°﹣40°)=70°. 故选C .【点睛】本题考查了圆周角定理、等腰三角形的性质等知识,解题的关键是灵活运用所学知识解决问题,学会添加常用辅助线,属于中考常考题型.8.A解析:A 【解析】 【分析】根据黄金分割的比值约为0.618列式进行计算即可得解. 【详解】解:∵书的宽与长之比为黄金比,书的长为20cm , ∴书的宽约为20×0.618=12.36cm . 故选:A . 【点睛】本题考查了黄金比例的应用,掌握黄金比例的比值是解题的关键.9.D解析:D 【解析】 【分析】根据题意可判断四边形ABNM 为梯形,再由切线的性质可推出∠ABN=60°,从而判定△APO ≌△BPO ,可得AP=BP=3,在直角△APO 中,利用三角函数可解出半径的值. 【详解】解:连接OP ,OM ,OA ,OB ,ON ∵AB ,AM ,BN 分别和⊙O 相切, ∴∠AMO=90°,∠APO=90°, ∵MN ∥AB ,∠A =60°, ∴∠AMN=120°,∠OAB=30°, ∴∠OMN=∠ONM=30°, ∵∠BNO=90°, ∴∠ABN=60°, ∴∠ABO=30°, 在△APO 和△BPO 中,OAP OBP APO BPO OP OP ∠=∠⎧⎪∠=∠⎨⎪=⎩, △APO ≌△BPO (AAS ), ∴AP=12AB=3, ∴tan ∠OAP=tan30°=OP AP∴. 故选D.【点睛】本题考查了切线的性质,切线长定理,解直角三角形,全等三角形的判定和性质,关键是说明点P 是AB 中点,难度不大.10.B解析:B【解析】【分析】根据题意得根的判别式0<,即可得出关于a 的一元一次不等式,解之即可得出结论.【详解】∵1a =,2b =-,1c a =-,由题意可知:()()22424110b ac a =-=--⨯⨯-<⊿,∴a >2,故选:B .【点睛】本题考查了一元二次方程20ax bx c ++=(a ≠0)的根的判别式24b ac =-⊿:当0>,方程有两个不相等的实数根;当0=,方程有两个相等的实数根;当0<,方程没有实数根. 11.C解析:C【解析】【分析】设快递量平均每年增长率为x ,根据我国2018年及2020年的快递业务量,即可得出关于x 的一元二次方程,此题得解.【详解】设快递量平均每年增长率为x ,依题意,得:600(1+x )2=950.故选:C .【点睛】本题考查了由实际问题抽象出一元二次方程,找准等量关系,正确列出一元二次方程是解题的关键.12.C解析:C【解析】【分析】二次函数y =x 2+4x +n 的图象与x 轴只有一个公共点,则240b ac =-=⊿,据此即可求得.【详解】∵1a =,4b =,c n =,根据题意得:2244410b ac n =-=⨯⨯=⊿﹣,解得:n =4,故选:C .【点睛】本题考查了抛物线与x 轴的交点,二次函数2y ax bx c =++(a ,b ,c 是常数,a ≠0)的交点与一元二次方程20ax bx c ++=根之间的关系.24b ac =-⊿决定抛物线与x 轴的交点个数.⊿>0时,抛物线与x 轴有2个交点;0=⊿时,抛物线与x 轴有1个交点;⊿<0时,抛物线与x 轴没有交点.二、填空题13.【解析】【分析】根据旋转性质及直角三角形斜边中线等于斜边一半,求出CD=CE=5,再根据勾股定理求DE 长,的值即为等腰△CDE 底角的正弦值,根据等腰三角形三线合一构建直角三角形求解.【详解】【解析】【分析】根据旋转性质及直角三角形斜边中线等于斜边一半,求出CD=CE=5,再根据勾股定理求DE 长,sin DEC ∠的值即为等腰△CDE 底角的正弦值,根据等腰三角形三线合一构建直角三角形求解.【详解】如图,过D 点作DM ⊥BC ,垂足为M ,过C 作CN ⊥DE ,垂足为N ,在Rt △ACB 中,AC=8,BC=6,由勾股定理得,AB=10,∵D 为AB 的中点,∴CD=152AB = , 由旋转可得,∠MCN=90°,MN=10,∵E为MN的中点,∴CE=15 2MN,∵DM⊥BC,DC=DB,∴CM=BM=13 2BC=,∴EM=CE-CM=5-3=2,∵DM=14 2AC,∴由勾股定理得,DE=25,∵CD=CE=5,CN⊥DE,∴DN=EN=5 ,∴由勾股定理得,CN=25,∴sin∠DEC=255 CNCE.25.【点睛】本题考查旋转性质,直角三角形的性质和等腰三角形的性质,能够用等腰三角形三线合一的性质构建直角三角形解决问题是解答此题的关键.14.【解析】【分析】分别计算半径为10cm的圆的面积和边长为30cm的正方形ABCD的面积,然后计算即可求出飞镖落在圆内的概率;【详解】解:(1)∵半径为10cm的圆的面积=π•102=100解析:9π【解析】【分析】分别计算半径为10cm的圆的面积和边长为30cm的正方形ABCD的面积,然后计算SS半圆正方形即可求出飞镖落在圆内的概率;【详解】解:(1)∵半径为10cm 的圆的面积=π•102=100πcm 2,边长为30cm 的正方形ABCD 的面积=302=900cm 2,∴P (飞镖落在圆内)=100==9009S S ππ半圆正方形,故答案为:9π. 【点睛】本题考查了几何概率,掌握概率=相应的面积与总面积之比是解题的关键.15.-5.【解析】【分析】根据一元二次方程根与系数的关系即可求解.【详解】∵,是关于的一元二次方程的两根,∴,∴,故答案为:.【点睛】本题考查了一元二次方程根与系数的关系,如果,是方解析:-5.【解析】【分析】根据一元二次方程根与系数的关系即可求解.【详解】∵1x ,2x 是关于x 的一元二次方程240x x +-=的两根,∴121214x x x x +=-=-,, ∴()1212145x x x x ++=-+-=-,故答案为:5-.【点睛】本题考查了一元二次方程根与系数的关系,如果1x ,2x 是方程20x px q ++=的两根,那么12x x p +=﹣,12x x q =. 16.115°【解析】【分析】根据过C 点的切线与AB 的延长线交于P 点,∠P=40°,可以求得∠OCP 和∠OBC的度数,又根据圆内接四边形对角互补,可以求得∠D的度数,本题得以解决.【详解】解:连解析:115°【解析】【分析】根据过C点的切线与AB的延长线交于P点,∠P=40°,可以求得∠OCP和∠OBC的度数,又根据圆内接四边形对角互补,可以求得∠D的度数,本题得以解决.【详解】解:连接OC,如右图所示,由题意可得,∠OCP=90°,∠P=40°,∴∠COB=50°,∵OC=OB,∴∠OCB=∠OBC=65°,∵四边形ABCD是圆内接四边形,∴∠D+∠ABC=180°,∴∠D=115°,故答案为:115°.【点睛】本题考查切线的性质、圆内接四边形,解题的关键是明确题意,找出所求问题需要的条件.17.9【解析】【分析】利用两角对应相等两三角形相似证△BCD∽△BAC,根据相似三角形对应边成比例得比例式,代入数值求解即可.【详解】解:∵,,∴∠ACB=∠CDB=90°,∵∠B=∠B,解析:9【解析】【分析】利用两角对应相等两三角形相似证△BCD ∽△BAC ,根据相似三角形对应边成比例得比例式,代入数值求解即可.【详解】解:∵BC AC ⊥,CD AB ⊥,∴∠ACB=∠CDB=90°,∵∠B=∠B,∴△BCD ∽△BAC, ∴BC BD AB BC = , ∴152515BD =, ∴BD=9.故答案为:9.【点睛】本题考查利用相似三角形的性质求线段长,证明两三角形相似注意题中隐含条件,如公共角,对顶角等,利用相似的性质得出比例式求解是解答此题的关键.18.【解析】【分析】将△ABE 绕点A 旋转60°至△AGF 的位置,根据旋转的性质可证△AEF 和△ABG 为等边三角形,即可证明EF=AE,GF=BE,所以根据两点之间线段最短EA+EB+EC=GF+E【解析】【分析】将△ABE 绕点A 旋转60°至△AGF 的位置,根据旋转的性质可证△AEF 和△ABG 为等边三角形,即可证明EF=AE,GF=BE,所以根据两点之间线段最短EA+EB+EC=GF+EF+EC≥GC ,表示Rt △GMC 的三边,根据勾股定理即可求出正方形的边长.【详解】解:如图,将△ABE 绕点A 旋转60°至△AGF 的位置,连接EF,GC,BG ,过点G 作BC 的垂线交CB 的延长线于点M.设正方形的边长为2m ,∵四边形ABCD 为正方形,∴AB=BC=2m,∠ABC=∠ABM=90°,∵△ABE 绕点A 旋转60°至△AGF ,∴,,60,AG AB AF AE BAG EAF BE GF ==∠=∠=︒=,∴△AEF 和△ABG 为等边三角形,∴AE=EF,∠ABG=60°,∴EA+EB+EC=GF+EF+EC≥GC ,∴GC=13∵∠GBM=90°-∠ABG =30°,∴在Rt △BGM 中,GM=m ,3m ,Rt △GMC 中,勾股可得222GC GM CM =+, 即:222(32)(13)m m m ++=+, 解得:2m =, ∴边长为22m =2.【点睛】 本题考查正方形的性质,旋转的性质,等边三角形的性质和判定,含30°角的直角三角形,两点之间线段最短,勾股定理.能根据旋转作图,得出EA+EB+EC=GF+EF+EC≥GC 是解决此题的关键.19.【解析】分析:取AB 的中点M ,连接ME ,在AD 上截取ND=DF ,设DF=DN=x ,则NF=x ,再利用矩形的性质和已知条件证明△AME ∽△FNA ,利用相似三角形的性质:对应边的比值相等可求出x 的 410 【解析】分析:取AB的中点M,连接ME,在AD上截取ND=DF,设DF=DN=x,则NF=2x,再利用矩形的性质和已知条件证明△AME∽△FNA,利用相似三角形的性质:对应边的比值相等可求出x的值,在直角三角形ADF中利用勾股定理即可求出AF的长.详解:取AB的中点M,连接ME,在AD上截取ND=DF,设DF=DN=x,∵四边形ABCD是矩形,∴∠D=∠BAD=∠B=90°,AD=BC=4,∴2x,AN=4﹣x,∵AB=2,∴AM=BM=1,∵5AB=2,∴BE=1,∴222BM BE+=∵∠EAF=45°,∴∠MAE+∠NAF=45°,∵∠MAE+∠AEM=45°,∴∠MEA=∠NAF,∴△AME∽△FNA,∴AM ME FN AN=,242xx=-,解得:x=4 3∴22410AD DF+=410.点睛:本题考查了矩形的性质、相似三角形的判断和性质以及勾股定理的运用,正确添加辅助线构造相似三角形是解题的关键,20.48【解析】【分析】根据面积之比得出相似比,然后利用周长之比等于相似比即可得出答案.【详解】∵两个相似三角形的面积比为∴两个相似三角形的相似比为∴两个相似三角形的周长也比为∵较大的三解析:48【解析】【分析】根据面积之比得出相似比,然后利用周长之比等于相似比即可得出答案.【详解】∵两个相似三角形的面积比为9:16∴两个相似三角形的相似比为3:4∴两个相似三角形的周长也比为3:4∵较大的三角形的周长为64cm∴较小的三角形的周长为643484cm ⨯=故答案为:48.【点睛】本题主要考查相似三角形的性质,掌握相似三角形的性质是解题的关键.21.120°.【解析】试题分析:若△ABC以O为旋转中心,旋转后能与原来的图形重合,根据旋转变化的性质,可得△ABC旋转的最小角度为180°﹣60°=120°.故答案为120°.考点:旋转对称图形解析:120°.【解析】试题分析:若△ABC以O为旋转中心,旋转后能与原来的图形重合,根据旋转变化的性质,可得△ABC旋转的最小角度为180°﹣60°=120°.故答案为120°.考点:旋转对称图形.22.1或1.75或2.25s【解析】试题分析:∵AB是⊙O的直径,∴∠C=90°.∵∠ABC=60°,∴∠A=30°.又BC=3cm,∴AB=6cm.则当0≤t<3时,即点E从A到B再到解析:1或1.75或2.25s【解析】试题分析:∵AB是⊙O的直径,∴∠C=90°.∵∠ABC=60°,∴∠A=30°.又BC=3cm,∴AB=6cm.则当0≤t<3时,即点E从A到B再到O(此时和O不重合).若△BEF是直角三角形,则当∠BFE=90°时,根据垂径定理,知点E与点O重合,即t=1;当∠BEF=90°时,则BE=BF=34,此时点E走过的路程是214或274,则运动时间是74s或94s.故答案是t=1或74或94.考点:圆周角定理.23.0或﹣1【解析】【分析】根据题意把原点(0,0)代入解析式,得出关于m的方程,然后解方程即可.【详解】∵函数经过原点,∴m(m+1)=0,∴m=0或m=﹣1,故答案为0或﹣1.【点解析:0或﹣1【解析】【分析】根据题意把原点(0,0)代入解析式,得出关于m的方程,然后解方程即可.【详解】∵函数经过原点,∴m(m+1)=0,∴m=0或m=﹣1,故答案为0或﹣1.【点睛】本题考查二次函数图象上点的坐标特征,解题的关键是知道函数图象上的点满足函数解析式.24.30【解析】【分析】如图,首先利用勾股定理判定△ABC 是直角三角形,由题意得圆心O 所能达到的区域是△DEG,且与△ABC 三边相切,设切点分别为G 、H 、P 、Q 、M 、N ,连接DH 、DG 、EP 、EQ解析:30【解析】【分析】如图,首先利用勾股定理判定△ABC 是直角三角形,由题意得圆心O 所能达到的区域是△DEG ,且与△ABC 三边相切,设切点分别为G 、H 、P 、Q 、M 、N ,连接DH 、DG 、EP 、EQ 、FM 、FN ,根据切线性质可得:AG =AH ,PC =CQ ,BN =BM ,DG 、EP 分别垂直于AC ,EQ 、FN 分别垂直于BC ,FM 、DH 分别垂直于AB ,继而则有矩形DEPG 、矩形EQNF 、矩形DFMH ,从而可知DE =GP ,EF =QN ,DF =HM ,DE ∥GP ,DF ∥HM ,EF ∥QN ,∠PEF =90°,根据题意可知四边形CPEQ 是边长为1的正方形,根据相似三角形的判定可得△DEF ∽△ACB ,根据相似三角形的性质可知:DE ∶EF ∶FD =AC ∶CB ∶BA =3∶4∶5,进而根据圆心O 运动的路径长列出方程,求解算出DE 、EF 、FD 的长,根据矩形的性质可得:GP 、QN 、MH 的长,根据切线长定理可设:AG =AH =x ,BN =BM =y ,根据线段的和差表示出AC 、BC 、AB 的长,进而根据AC ∶CB ∶BA =3∶4∶5列出比例式,继而求出x 、y 的值,进而即可求解△ABC 的周长.【详解】∵AC ∶CB ∶BA =3∶4∶5,设AC =3a ,CB =4a ,BA =5a (a >0)∴()()()222222=345AC CB a a a BA ++==∴△ABC 是直角三角形,设⊙O 沿着△ABC 的内部边缘滚动一圈,如图所示,连接DE 、EF 、DF ,设切点分别为G 、H 、P 、Q 、M 、N ,连接DH 、DG 、EP 、EQ 、FM 、FN ,根据切线性质可得:AG =AH ,PC =CQ ,BN =BMDG 、EP 分别垂直于AC ,EQ 、FN 分别垂直于BC ,FM 、DH 分别垂直于AB ,∴DG ∥EP ,EQ ∥FN ,FM ∥DH ,∵⊙O 的半径为1∴DG =DH =PE =QE =FN =FM =1,则有矩形DEPG 、矩形EQNF 、矩形DFMH ,∴DE =GP ,EF =QN ,DF =HM ,DE ∥GP ,DF ∥HM ,EF ∥QN,∠PEF =90°又∵∠CPE=∠CQE=90°, PE=QE=1∴四边形CPEQ是正方形,∴PC=PE=EQ=CQ=1,∵⊙O的半径为1,且圆心O运动的路径长为18,∴DE+EF+DF=18,∵DE∥AC,DF∥AB,EF∥BC,∴∠DEF=∠ACB,∠DFE=∠ABC,∴△DEF∽△ABC,∴DE:EF:DF=AC:BC:AB=3:4:5,设DE=3k(k>0),则EF=4k,DF=5k,∵DE+EF+DF=18,∴3k+4k+5k=18,解得k=32,∴DE=3k=92,EF=4k=6,DF=5k=152,根据切线长定理,设AG=AH=x,BN=BM=y,则AC=AG+GP+CP=x+92+1=x+5.5,BC=CQ+QN+BN=1+6+y=y+7,AB=AH+HM+BM=x+152+y=x+y+7.5,∵AC:BC:AB=3:4:5,∴(x+5.5):(y+7):(x+y+7.5)=3:4:5,解得x=2,y=3,∴AC=7.5,BC=10,AB=12.5,∴AC+BC+AB=30.所以△ABC的周长为30.故答案为30.【点睛】本题是一道动图形问题,考查切线的性质定理、相似三角形的判定与性质、矩形的判定与性质、解直角三角形等知识点,解题的关键是确定圆心O的轨迹,学会作辅助线构造相似三角形,综合运用上述知识点.三、解答题25.(1)y=(x-1)2-4;(2)点G 坐标为(3.6,2.76),S △FHG =6.348;(3)m=0.6,四边形CDPQ 为平行四边形,理由见解析.【解析】【分析】(1)利用顶点式求解即可,(2)将G 点代入函数解析式求出坐标,利用坐标的特点即可求出面积,(3)作出图象,延长QH ,交x 轴于点R ,由平行线的性质得证明△AQR ∽△PHQ,设Q[n,0.6(n+1)],代入y=mx+m 中,即可证明四边形CDPQ 为平行四边形.【详解】(1)设二次函数的解析式是y=a(x-h)2+k,(a≠0),由题可知该抛物线与y 轴交于点E (0,3-),顶点为C (1,4-),∴y=a(x-1)2-4,代入E (0,3-),解得a=1,2(1)4y x =--(223y x x =--)(2)设G[a,0.6(a+1)],代入函数关系式,得,2(1)40.6(1)a a --=+,解得a 1=3.6,a 2=-1(舍去),所以点G 坐标为(3.6,2.76).S △FHG =6.348(3)y=mx+m=m (x+1),当x=-1时,y=0,所以直线y=mx+m延长QH ,交x 轴于点R ,由平行线的性质得,QR ⊥x 轴.因为FH ∥x 轴,所以∠QPH=∠QAR,因为∠PHQ=∠ARQ=90°,所以△AQR ∽△PQH, 所以QR QH AR PH= =0.6, 设Q[n,0.6(n+1)],代入y=mx+m 中,mn+m=0.6(n+1),m (n+1)=0.6(n+1),因为n+1≠0,所以m=0.6..因为y 2=(x-1-m )2+0.6m-4,所以点D 由点C 向右平移m 个单位,再向上平移0.6m 个单位所得,过D 作y 轴的平行线,交x 轴与K,再作CT ⊥KD,交KD 延长线与T,所以KD QRSK AR==0.6,所以tan∠KSD=tan∠QAR,所以∠KSD=∠QAR,所以AQ∥CS,即CD∥PQ.因为AQ∥CS,由抛物线平移的性质可得,CT=PH,DT=QH,所以PQ=CD,所以四边形CDPQ为平行四边形.【点睛】本题考查了待定系数法求解二次函数解析式,二次函数的图象和性质,一次函数与二次函数的交点问题,相似三角形的判定和性质,综合性强,难度较大,掌握待定系数法是求解(1)的关键,求出G点坐标是求解(2)的关键,证明三角形的相似并理解题目中准黄金直角三角形的概念是求解(3)的关键.26.(1)7;(2)日最低气温波动大.【解析】【分析】(1)根据温差=最高温度-最低温度,再根据有理数的减法进行计算即可得出答案(2)利用方差公式直接求出最高气温与最低气温的方差,再进行比较即可.【详解】解:(1)5-(-2)=5+2=7所以1月1日当天的日温差为7℃(2)最高气温的平均数:5768465x++++==高最高气温的方差为:()()()()()222222567666864625S-+-+-+-+-==高同理得出,最低气温的平均数:0x =低最低气温的方差为:23.6S =低∵22S S <低高∴日最低气温波动大.【点睛】本题考查的知识点是求数据的平均数与方差,熟记方差公式是解题的关键.27.(1)y=﹣(x ﹣1)2+1,C(﹣1,﹣3);(2)3;(3)存在满足条件的N 点,其坐标为(53,0)或(73,0)或(﹣1,0)或(5,0) 【解析】【分析】 (1)可设顶点式,把原点坐标代入可求得抛物线解析式,联立直线与抛物线解析式,可求得C 点坐标;(2)设直线AC 的解析式为y =kx +b ,与x 轴交于D ,得到y =2x−1,求得BD 于是得到结论;(3)设出N 点坐标,可表示出M 点坐标,从而可表示出MN 、ON 的长度,当△MON 和△ABC 相似时,利用三角形相似的性质可得MN ON AB BC =或MN ON BC AB=,可求得N 点的坐标.【详解】(1)∵顶点坐标为(1,1),∴设抛物线解析式为y=a (x ﹣1)2+1,又抛物线过原点,∴0=a (0﹣1)2+1,解得a=﹣1,∴抛物线解析式为y=﹣(x ﹣1)2+1,即y=﹣x 2+2x ,联立抛物线和直线解析式可得22-2y x x y x ⎧=+⎨=⎩﹣, 解得20x y =⎧⎨=⎩或13x y =-⎧⎨=-⎩,∴B (2,0),C (﹣1,﹣3); (2)设直线AC 的解析式为y=kx+b ,与x 轴交于D ,把A (1,1),C (﹣1,﹣3)的坐标代入得13k b k b=+⎧⎨-=-+⎩, 解得:21k b =⎧⎨=-⎩, ∴y=2x ﹣1,当y=0,即2x ﹣1=0,解得:x=12,∴D (12,0), ∴BD=2﹣12=32,∴△ABC 的面积=S △ABD +S △BCD =12×32×1+12×32×3=3; (3)假设存在满足条件的点N ,设N (x ,0),则M (x ,﹣x 2+2x ),∴ON=|x|,MN=|﹣x 2+2x|,由(2)知,,,∵MN ⊥x 轴于点N ,∴∠ABC=∠MNO=90°,∴当△ABC 和△MNO 相似时,有MN ON AB BC =或MN ON BC AB=, ①当MN ON AB BC =时,∴=|x||﹣x+2|=13|x|, ∵当x=0时M 、O 、N 不能构成三角形,∴x≠0,∴|﹣x+2|=13,∴﹣x+2=±13,解得x=53或x=73,此时N 点坐标为(53,0)或(73,0); ②当或MN ON BC AB =时,∴=,即|x||﹣x+2|=3|x|, ∴|﹣x+2|=3,∴﹣x+2=±3,解得x=5或x=﹣1,此时N 点坐标为(﹣1,0)或(5,0),综上可知存在满足条件的N 点,其坐标为(53,0)或(73,0)或(﹣1,0)或(5,0).【点睛】本题为二次函数的综合应用,涉及知识点有待定系数法、图象的交点问题、直角三角形的判定、勾股定理及逆定理、相似三角形的性质及分类讨论等.在(1)中注意顶点式的运用,在(3)中设出N 、M 的坐标,利用相似三角形的性质得到关于坐标的方程是解题的关键,注意相似三角形点的对应.本题考查知识点较多,综合性较强,难度适中.28.(1)2y x 2x 3=-++;(2)2x <-或3x >;(3)()4,5D -.【解析】【分析】(1)先求出A,B 的坐标,再代入二次函数即可求解;(2)根据函数图像即可求解;(3)先求出C 点坐标,再根据平移的性质得到3EF FD ==,设点(),3E a a -,则()3,6D a a +-,把D 点代入二次函数即可求解.【详解】解:(1)令0y =,得3x =,∴()3,0A .把()2,B m -代入3y x =-,解得()2,5B --. 把()3,0A ,()2,5B --代入2y x bx c =-++,得093542b c b c =-++⎧⎨-=--+⎩,∴23b c =⎧⎨=⎩, ∴二次函数的表达式为2y x 2x 3=-++.(2)由图像可知,当12y y >时,2x <-或3x >.(3)令0x =,则3y =,∴()0,3C .∵平移,∴AOC DFE ∆≅∆,∴3EF FD ==.设点(),3E a a -,则()3,6D a a +-,∴()()263233a a a -=-++++,∴11a =,26a =-(舍去). ∴()4,5D -.【点睛】此题主要考查二次函数的图像与性质,解题的关键是熟知待定系数法的运用.29.(1)x 1=3,x 2=﹣7;(2)x 1=72+x 2=72- 【解析】【分析】(1)根据因式分解法解方程即可;(2)根据公式法解方程即可.【详解】解:(1)x 2+4x ﹣21=0(x ﹣3)(x+7)=0解得x 1=3,x 2=﹣7;(2)x 2﹣7x ﹣2=0∵△=49+8=57∴x解得x 1=72+x 2=72-. 【点睛】本题考查了解一元二次方程,其方法有直接开平方法、公式法、配方法、因式分解法,根据一元二次方程特点选择合适的方法是解题的关键.30.(1)直角;(2)P (32,54);(3)0<x <4. 【解析】【分析】(1)求出点A 、B 、C 的坐标分别为:(-1,0)、(4,0)、(0,2),则AB 2=25,AC 2=5,BC 2=20,即可求解;。
2013-2014学年上期九年级期末考试英语试题(时间:120 分钟满分:120 分)第一部分选择题(共80分)一、听力(共二节,计25分)第一节(共9小题;每小题1分,满分9分)听下面9段对话。
每段对话后面有一个小题,从题后所给的A、B、C三个选项中选出最佳选项。
听完每段对话后,你将有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
( ) 1. A. See a movie. B. Go on vacation. C. Do homework.( ) 2. A. Give away some food. B. Clean up the park. C. Give away some money. ( ) 3. A. She asks the man her age. B. She didn’t have a pen.C. She had a car at that time. ( ) 4. A. Ran to school. B. By bus. C. By car.( ) 5. A. Somewhere warm. B. Somewhere hot. C. Somewhere cold.( ) 6. A. Loud music. B. Rock music. C. Quiet music.( ) 7. A. A restaurant. B. A bookstore. C. A museum.( ) 8. A. Korea. B. Table manners. C. Customs in Korea.( ) 9. A. It makes her sleepy. B. It makes her sad. C. It makes her happy.第二节(共16小题;每小题1分,满分16分)听下面5段对话或独白。
每段对话或独白后面有几个小题,从题后所给的A、B、C三个选项中选出最佳选项。
河北省秦皇岛文华教育2013届九年级物理上学期期末考试试题新人教版一、选择题(每题4分,共40分)1.把两块纯净的铅压紧,它们就会合成一块,而把两块光滑的玻璃紧贴在一起,却不会合成一块的原因是( )A.玻璃分子间不存在引力B.玻璃分子间距离太大,分子间几乎没有作用力了C.玻璃太硬,斥力大于引力D.以上说法都不对2.比热容是物质的一种特性,对此话的理解错误的是( )A.物质的比热容与物质吸收的热量成正比,与物体的质量和温度变化成反比B.比热容与物质的形状、位置、温度无关C.物质吸收热量后温度升高,它的比热容不发生变化D.冰水混合物中的水、沸水中的水比热容是相同的3.实验证明:丝绸、塑料棒、毛皮三种物质的原子核对电子的束缚本领是由强到弱的,现有甲、乙两根相同的塑料棒,让甲与丝绸摩擦,让乙与毛皮摩擦,结果是( )A.两棒均带正电B.两棒均带负电C.甲棒带正电、乙棒带负电D.甲棒带负电、乙棒带正电4.两盏灯和一个开关,用导线把它们和电源连接起来,下面说法正确的是( )A.若闭合开关,两灯全亮,断开开关两灯全熄灭,这两盏灯一定是串联B.若闭合开关,两灯全亮,断开开关两灯全熄灭,这两盏灯一定是并联C.若断开开关一灯亮,一灯不亮,那么这两盏灯一定是并联D.条件不足无法判断5.关于燃料的热值,以下说法中正确的是( )A.燃料的热值与燃料的质量及燃烧情况无关B.容易燃烧的燃料,热值一定大C.煤的热值大于干木柴的热值,燃烧煤放出的热量比燃烧干木柴放出的热量一定多D.为了提高锅炉的效率,一定要用热值高的燃料6.小刚拆开了家庭电路中常用的白炽灯泡和灯头,如图1所示,则以下灯泡和灯头上的各部件中全部属于绝缘体的是( )A.灯头后盖、螺旋B.玻璃泡、锡块C.螺旋、金属片D.灯头后盖、玻璃泡图17.下列关于分子动理论的说法中,错误的是( )A.物质是由分子组成的B.一切物体的分子都在不停地做无规则运动C .斥力随分子间距的增大而减小,引力随分子间距的增大而增大D .当分子间距大于分子直径的10倍时,分子间作用力可以忽略不计8.图2是一种探究改变电路中电流大小的电路.滑动变阻器的最大阻值R =20 Ω,电源电压U 保持不变,R 0为定值电阻.当滑片位于最左端时,电流表示数为0.3 A ,则把滑片向右移动到C 点时(R BC =R /5),通过R 0的电流大小可能是( )A .0.28 AB .0.33 AC .0.11 AD .无法确定图2 图39.如图3所示电路,闭合开关S ,两灯均正常发光,下列说法中正确的是( )A .通过a 点的电流等于通过c 点的电流B .通过a 点的电流大于通过c 点的电流C .电压表测的是c 点的电压D .电压表测的是电源电压 10.有分别标有“4 V 8 W”和“8 V 32 W”字样的两盏灯L1和L 2,把它们与“4 A 10 Ω”的滑动变阻器串联后接在12 V 的电源上,如图4所示,当变阻器的滑片P 从b 向a 滑动时,若电阻不随温度而改变,则下列说法不正确的是( ) A .两灯都变亮,且一样亮B .两灯都变亮,因L 2额定功率大,所以比L 1更亮 图4C .两灯都变亮,且L 1首先正常发光D .两灯变亮,且L 1可能先被烧毁 二、填空题(每题4分,共28分)11.如图5所示为某内燃机工作过程中某一冲程的工作示意图.从图上可判断这种内燃机是________机,正在进行的是________冲程.12.甲、乙两物体质量之比是1∶2,当它们降低相同温度时,放出的热量之比是2∶1,则甲、乙两物体的比热容之比c 甲∶c 乙=________.温度均为10 ℃的甲、乙两物体,质量之比为3∶1,比热容之比为2∶1,当它们吸收相等的热量后,甲温度升高到30 ℃,则乙物体温度升高到________℃. 图5 13.以下谚语说明了什么样的物理现象?(1)酒香不怕巷子深.__________________________.(2)“夜盖棉被日穿纱,围着火炉吃西瓜”描述沙漠地区昼夜温差大.________________________________________________________.图6 图7 14.如图6所示,已知两只灯泡L 1和L 2是串联,则在a 、b 、c 三个电表中(电流表或电压表),a 是________表,b 是________表,c 是________表.15.如图7所示为“欧姆定律”一节中“研究电流与电阻关系”的实验电路图.(1)为了达到研究的目的,实验过程必须保持________不变.(2)当开关S闭合后,电压表的示数是2 V,电流表的示数是0.4 A,现在将阻值换成10 Ω的电阻接入电路来进行研究,则下一步进行的操作是________________________.16.人们把________定向移动的方向规定为电流的方向,金属导体中的电流方向跟________移动的方向相反,这是因为在金属中能够自由移动的电荷是________.如图8所示,用导线把一个小灯泡和开关连接起来,要使灯泡发光,必须在ab两端接入________,还需要________.图8 图917.如图9是某电池外壳上的说明,由说明可知该电池的电压是________V,根据学过的物理知识可以判断出“500 mAh”中的“mAh”是物理量________的单位,电池中含有汞(Hg)、镉(Cd)等多种重金属,电池外壳锈蚀腐烂后会污染环境,危害公众健康.说明中左边打“×”的图案表示普通垃圾箱,它告诉我们_____________________________________________(注:RECHARGEABLE可充电池,STANDARD CHARCE标准充电)三、实验探究题(共22分)18.(9分)下表列出了由实验测定的几种物质的比热容.认真阅读上表,你一定能有所发现,请填出其中任意三条.(1)______ __________________;(2)______________________;(3)____________________.19.(13分)学校学生宿舍走廊的路灯,灯泡容易损坏,经常需要更换.电工小段在原来电灯的位置,接入了两盏与原来一样的白炽灯.同学们注意到灯很长一段时间没有坏,而且这两盏灯的亮度比原来用一盏灯时要暗,由此:(1)同学们猜想这两盏灯的连接方式是图10所示甲、乙两图图10中的一种,你认为正确的是________图,你判断的依据是____________________.(2)现在电池组、小灯泡、开关、导线等器材(器材数量不限),请你利用这些器材来模拟检验你的判断.在实验中,你主要观察______.画出模拟的电路图:(3)电工小段这样做______(填“能”或“不能”)省电.理由:________________________________________________________________________.四、计算题(共30分)20.(12分)电闪雷鸣是由带电云放电引起的.如果带电云与地面上的物体间发生放电,则地面上的物体就会被雷电击中 (雷击).若某次雷击放电过程中,带电云与地面某建筑物间的电压约为109 V,放电电流约为100 A,放电时间约为0.3 s,求:(1)此次放电释放的电能大约是多少?(2)若此次放电所释放的电能全部转化为水的内能,可使多少吨水的温度由20 ℃升高到100 ℃?21.(18分)小明的爸爸从国外带回一只旅行电热壶,右表是其译成中文的说明书.(1)小明说这个壶在中国家庭电路中不能直接使用,请你解释其原因.(2)小明说可以将此壶与一只电阻串联后使用,请你帮他计算出该电阻的阻值.(3)此壶正常工作时,在标准大气压下,将一壶20 ℃的水烧开至少需要多长时间?(不计热损失)答案1.B 2.A 3.C 4.C 5.A 6.D 7.C 8.B 9.A 10.B11.柴油做功12.4∶113013.(1)分子做无规则运动(2)沙漠地区多砂石,砂石的比热容小14.电压电流电压15.(1)电压(2)向左移动滑片P,直至电压表示数为2 V16.正电荷自由电子负电荷电源闭合开关17.1.2 V 电荷量废旧电池不要随意丢弃(或不要当普通垃圾扔掉,应进行分类回收等) 18.(1)比热容是物质的一种特性,每种物质都有自己的比热容.(2)水的比热容最大.(3)个别同种物质,在不同状态下(如冰、水),比热容不同.(4)个别不同物质,它们的比热容相同(如冰,煤油).(5)液态物质的比热容一般比固态物质的比热容大.(6)在注意一般规律的同时,应注意个别特殊情况(水银的比热容比多数固态物质的比热容小).(以上任选三条即可)19.(1)甲灯变暗(或灯很长时间没有坏)(2)灯泡的亮度电路图如图所示第19题图(3)能 两灯串联,总电阻变大,电源电压一定时,根据P =U 2R,实际功率变小,消耗的电能减少,所以能省电20.(1)根据公式W =UIt 得,放电所释放的能量W =UIt =109 V×100 A×0.3 s=3×1010J.(2)Q 吸=W =3×1010J.根据公式Q 吸=cm (t -t 0)得: 水的质量m =Q 吸c (t -t 0)=3×1010J4.2×103J/(kg·℃)×(100 ℃-20 ℃)≈8.93×104kg =89.3 t21.(1)旅行电热壶的额定电压是110 V ,小于中国家庭用电电压220 V. (2)由于电阻R 1与电热壶串联,根据串联电路的特点可知电阻R 1两端的电压与热水壶两端的电压相等,则串联的电阻的阻值R 1=R =U 2P =(110 V)2550 W=22 Ω.(3)水的质量m =ρ水V =1.0×103kg/m 3×10-3m 3=1 kg ,水吸收的热量Q =c 水m 水(t -t 0)=4.2×103 J/(kg ·℃)×1 kg ×(100-20) ℃=3.36×105J ,消耗的电能W =Q ,烧开水所需的时间t =W P =3.36×105 J 550 W=610.9 s.。
2013学年第一学期九年级(期末)质量检测英语试题温馨提示:1. 试卷满分95分, 考试时间90分钟, 共6大题, 61小题;2. 所有答案都写在答卷纸上,写在试卷上无效;3. 带★号的生词可以在试卷后面的小词典中查找。
细心审题,谨慎答题,相信你能表现得最好!试卷I一、单项填空(本题共10小题,每小题1分,满分10 分)请从A、B、C、D四个选项中选出可以填入空白处的最佳选项。
1. Doing exercise for _________ hour every day is good for our health.A. /B. aC. theD. an2.—I’m a little nervous to give an English speech this afternoon.—Come on ! Believe in ________ and you can do it.A. myselfB. yourselfC. himselfD. herself3. —When was this car made? It looks so old.—It was made _______1890.A. inB. onC. atD. since4. — Hello, Betty! Where are you now?— I ________ on the Great Wall of China and talking to you.A. standB. am standingC. stoodD. was standing5. —What will the weather be like tomorrow?—It__________ be rainy, cloudy or sunny, I’m not sure.A. mustB. mayC. shallD. should6. My dream hometown is an amazing place without any ________.A. populationB. trafficC. pollutionD. advertisements7. —What about going by plane?—Good idea! I feel really_______ because it’s the first time for me to take a plane!A. worriedB. sadC. strangeD. excited8. —Li An can always ________ some special ways to make his movies win prizes in theworld.—Yea. He is an unusual and creative director.. A. look up B. turn up C. come up with D. give up9. —The light in his room is still on. Do you know _______?—In order to get ready for the coming exam.A. why he stays up so lateB. if he works hardC. what he is doingD. when he will stop working10. —I think we should give a hand to the elderly when they fall onto the ground.— ___________. Everyone needs help when they are in trouble.A. Sorry, I can’tB. Never mindC. I don’t agreeD. I agree二、完型填空(本题有15小题,每小题1分,共15分)请从A、B、C、D四个选项中选出可以填入空白处的最佳选项It is getting colder by the day. When I was putting out my autumn clothes, a brown woolen* sweater caught my eye and reminded 11 of this time last year.It was on a cold morning that my mother came into my bedroom with the sweater. She said it was rather cold outside and asked me to wear it to school.“I spent the whole12 weaving* the sweater,”she told me.The sweater was so unfashionable and 13 that Iwas not pleased with it. After mom went out to work, I14 the ugly sweater to a corner. I would rather catch acold than wear it. I thought my classmates would laugh atme. I 15 a thin uniform and went to school.Before I walked into the classroom, I heard Lana’svoice: “Look at my overcoat. My father bought it in Hong Kong.”Connie said: “My scarf is16 , too”I looked through the window and was surprised to see all the girls in colorful winter clothes17 me. They showed their clothes to each other and laughed 18 . Suddenly, I felt inferior* to them. 19 wasn’t my family as rich as theirs? I wanted to wear beautiful clothes, too.A strong cold wind blew and I sneezed. During class I felt terrible. The 20 said I had caught a cold. “ You should wear thick clothes today, ” she said. I suddenly thought of my mom. She said the same thing to me 21 I didn’t listen.As soon as I got home I fell asleep on the sofa. I 22 of a woman weaving. She was my mother! She spent the whole night making a sweater for me. But I neither thanked her nor wore it. When I opened my _______, my mother was smiling at me. Her eyes were full of worry and care. I held her in my arms. “Sorry, mom, I should 24 have complained about that sweater. ”Two days later, I wore the warm and comfortable woolen sweater to school. Some of my classmates laughed at me. But I didn’t 25 . I know mom’s love is more important than money.11. A. me B. him C. her D. you12. A. morning B. afternoon C. night D. day13. A. comfortable B. beautiful C. ugly D. thin14. A. threw B. gave C. stored D. showed15. A. put up B. put on C. put off D. put away16. A. cheap B. expensive C. usual D. soft17. A. with B. without C. except D. against18.A. sadly B. quietly C. luckily D. happily19. A. How B. Why C. When D. Where20. A. doctor B. reporter C. actor D. player21. A. and B. but C. so D. or22. A. heard B. talked C. thought D. dreamed23. A. books B. doors C. windows D. eyes24. A. always B. usually C. sometimes D. never25 .A. care B. agree C. refuse D. realize三、阅读理解(本题有15小题,每小题2分,共30分)阅读下面短文,请从每题所给的A、B、C、D四个选项中选出最佳选项。
秦皇岛文华教育九年级上学期期末考试语文试卷(带解析) 考试时间:120分钟 考试总分:100分第1题:“错别字收救队”走街串巷,收集了不少错别字,下面句子中各有一个错别字,你能指出并改正吗?(2分) 绿草茵茵,踏之河忍(某生活区绿地宣传牌) 公用电话,全国直播(某公用电话亭) 错别字:__________________________ 改正:__________________________ 【答案】:河改为何 ;播改为拨。
【解析】: 试题分析:此题考查学生的词语辨析能力,需要学生在平时多读课文,多积累词语,多查工具书,注意易错字.注意生活中的错别字,广告中的错别字。
考点:识记并正确书写现代汉语普通话常用字的字音。
能力层级为识记A 第2题:下列语句中加点的词语使用不恰当的一项是( )(2分) A .这是一个__千载难逢__的好机会,你得好好抓住它。
B .只要我们有临危不惧,__临渴掘井__的精神,就没有克服不了的困难。
C .那一幕幕__不堪回首__的往事,在我幼小的心中留下了深刻的印象。
D .每一只年轻斑羚的成功飞渡,都意味着有一只老斑羚得__粉身碎骨__。
【答案】:B 【解析】: 试题分析:临渴掘井:感到渴了才掘井,比喻平时没有准备,事到临头才想办法。
与句子所表达意思不符。
考点:正确使用词语(包括熟语)。
能力层级为表达运用E 。
第3题:阅读下面的文段,按要求回答后面的问题。
(11分)姓名:________________ 班级:________________ 学号:________________ --------------------密----------------------------------封 ----------------------------------------------线----------------------纳米卫星纳米的概念,是由美国科学家于1995年首先提出的。
(考试时间:150分钟)说明:1.本次考试满分为130分,由三部分试题组成。
2.用钢笔或者圆珠笔工整作答。
一、积累·运用(31分)1.马上就要和朝夕相处的同学分别了,请在下面的方格内,用你最得意的字体为好朋友写下美好的祝福(20字以内)(4分)2.“错别字收救队”走街串巷,收集了不少错别字,下面句子中各有一个错别字,你能指出并改正吗?(2分)绿草茵茵,踏之河忍(某生活区绿地宣传牌)公用电话,全国直播(某公用电话亭)错别字:改正:3.下列语句中加点的词语使用不恰当的一项是()(2分)A.这是一个千载难逢....的好机会,你得好好抓住它。
B.只要我们有临危不惧,临渴掘井....的精神,就没有克服不了的困难。
C.那一幕幕不堪回首....的往事,在我幼小的心中留下了深刻的印象。
D.每一只年轻斑羚的成功飞渡,都意味着有一只老斑羚得粉身碎骨....。
4.高尔基说:“书籍是人类进步的阶梯”。
初中阶段你读了不少文学名著吧?请你从下列名著中任选一部,谈谈阅读这部小说感受最深刻的一点,并简要介绍你印象最深的一个情节。
(4分)《钢铁是怎样炼成的》《格列佛游记》《安徒生童话》名著:《》①感受:。
②情节:。
5.请你参加下面的语文综合性学习活动,按要求完成后面的题目(6分)2005年10月17日文坛巨匠巴金静静地走了。
他101年的生命历程,穿越了整个二十世纪,是中国现代文学历史使命的见证者。
他留下的丰厚的文学作品引领着我们步入文学的殿堂,去感受文学的魅力。
某某中学初三(6)班要举办一次专题纪念活动,同学们都积极筹备、参与。
①请你为这次纪念活动确定一个主题(2分)。
②围绕你所确定的主题,设计一个简要的活动方案。
(2分)。
③巴金一生以“讲真话”、“把心交给读者“作为自己的创作原则,请你对此发表一段简要的即席演讲。
(2分)。
6.名句积累(4分,每小题1分)①长风破浪会有时,。
②北宋著名文学家范仲淹在《岳阳楼记》中表现自己先忧后乐的拳拳心语的千古名句是:__________ ______,________ _______。
考查范围:语法知识、词汇知识、词义辨析—暂存、语篇范围一、单选题1. ---This is useful machine which was made in ________thirteenth centuryA.a, the B.an , the C./, the D.the , /2. The teacher came in, ______ a smile ______ his face.A.with; on B.on; with C.with; in D.and; on3. ----He’s never seen to eat so much food,______________?----No, he always eats a little.A.is he B.isn’t he C.has he D.hasn’t he4. ---How long has the meeting _______?--- Just a minute. I will check the time.A.begun B.started C.been on D.been begun5. .---I want to know if your son will go to the zoo. If your son does, so __________.--- Well, he is glad to be there.A.does B.he does C.will mine D.does mine6. _____interesting work it is to teach children!A.How B.What C.What an D.How an7. They are talking about the movie __they watched yesterdayA./B.whose C.what D.whom8. We have to ____the sports meeting till next Friday because of the bad weatherA.put up B.put away C.put on D.put off9. More and more people have realized that we won’t have cleaner water to drink unless something _______soon.A.is done B.was done C.will be done D.to be done10. Who saw it ______ at that time?A.happen B.happened C.happens D.to happen11. Mother told her son _______do that _______A.don’t, any longer B.to not, no longerC.not to, any more D.doesn’t, no more12. It`s not easy _______ Chinese students _______English well.A.of, to learn B.for, learningC.of, learning D.for, to learn13. ____Lily ___Lucy can go with you , because one of them has to stay here to look after their motherA.Either ; or B.Neither ; nor C.Both ; and D.Not only ; but also14. I wish I ____fly to the moon one dayA.can B.could C.am D.was二、完型填空15. It was very late when we came out of the cinema. We knew the last train would leave____:15 , so we ran as____as we could to the station. It was just aft er 11: 15 when we____the station, but the trains often leave a little____and there was a train standing at Platform 1(第一站台) , so we got in. We____for hal f an hour, then we got____. We found the ticket collector and asked him____the train was going to leave.“Tomorrow morning at six o clock,” he told us.There were____taxis outside the station____we walked home. It____us nearly two hours. The next morning we felt very tired.【小题1】A.in B.for C.at D.on【小题2】A.fast B.faster C.fastest D.fastly【小题3】A.reached to B.got C.arrived in D.arrived at【小题4】A.later B.early C.earlier D.late【小题5】A.wait B.are waiting C.waited D.waits【小题6】A.out B.in C.off D.on【小题7】A.how B.when C.why D.that【小题8】A.no B.not C.none D.nothing【小题9】A.but B.or C.so D.and【小题10】A.spent B.cost C.paid D.took三、阅读单选16. A passenger told an air hostess that he needed a cup of water to take his medicine when the plane just took off. she told him that she would bring him the water in ten minutes. thirty minutes later, when the passenger’s ring for service sounded, the air hostess flew in a hurry. she was kept so busy that she forgot to give him the water. As a result, the passenger was held up(延迟) to take his medicine. she hurried over to him with a cup of water, but he refused it.In the following hours on the flight, each time the air hostess passed the passenger she would ask him with a smile whether he needed help or not. but the pa ssenger never paid attention to her. when he was going to get off the plane, the passenger asked the air hostess to hand him the passengers’ brochure(小册子). she was very sad. she knew that he would write down sharp words, but with a smile she handed it to him. off the plane, she opened the brochure, and br oke a smile, for the passenger wrote, “on the flight, you asked me whether I need help or not for twelve times in all. how can I refuse your twelve____smile s?” That’s right! who can refuse twelve sincere smiles from a person?【小题1】What did the passenger need when the plane just took off ?A.brochure to write somethingB.A cup of water to take his medicineC.The air hostess to make an apologizeD.To get off the plane at once【小题2】Why did the air hostess forget to give him the water ?A.ecause the passenger was angryB.Because the passenger was very cruelC.Because she was very busyD.Because she was not friendly to the passenger【小题3】Why was the air hostess very sad ?A.She thought the passenger would write down bad wordsB.She thought she couldn`t give the passenger any helpC.She thought the passenger would tell her managerD.She thought she should say sorry to the passenger again【小题4】The Chinese meaning of the word “sincere”is ________A.自豪的B.婉转的C.真诚的D.委屈的【小题5】Do you think which is the best title for the passage ?A.The air hostess B.A cup of water C.Twelve smiles D.On the plane17. In today’s world many people seem to be hungry for money. Money does have its most useful effect on the poor. But once a person has a rich life, a lot more money doesn`t mean more happiness.If money were everything, all millionaires(百万富翁) would have real love, true friendship, good health and a long life. However, this is not always true .Bu t can love be bought ?I`m afraid not . Love means to give , not to take . To every person , health and long life are probably the most precious things . Well , c an health and a long life be bought with money ? The answer is “No”.Of all the longest living people in the world, few of them are millionaires. True friendship can’t be bought, either. In a word, where money is dreamed too much, it can cause brothers to quarrel, marriage to end, lovers to hate, and strangers to fight. No matter how much money you have, it is still not enough to ma ke a happy person if you have no one to laugh with, no one to cry for. 根据材料内容选择最佳答案,并将其标号填入题前括号内。
2013—2014学年度第一学期期末学情分析九年级英语试卷(考试时间100分钟试卷满分120分)注意:请将各题答案填涂(写)在答题卡相应位置。
一、听力(共20小题;每小题1分,满分20分)A)听对话回答问题,选择正确的选项。
听两遍。
1. What is the girl looking for?A B C2. Which sport does he like best?A B C3. How will he go to Beijing next month?A B C4. What was the boy doing?A B C5. What festival are they going to celebrate?A. Christmas.B. Halloween.C. Thanksgiving Day.6. What is the woman going to buy?A. A coat.B. A book.C. A ticket.7. What is Mike’s ideal job?A. A policeman.B. A post man.C. A driver.8. What is the man’s trouble?A. He can’t fall asleep at night.B. He doesn’t get enough exercise.C. He coughs much at night.9. What are the children doing?A. Playing football.B. Playing volleyball.C. Playing basketball.10. How many cars are there in the picture?A. Fifteen.B. Forty.C. Fifty.B)听对话和短文回答问题,选择正确的选项。
听两遍。
听第一段对话,回答第11-12小题。
题号一二三四五六七总分一、听力理解。
(20小题,每小题1分,共20分)第一节听下面5段对话,每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳答案,并将其标号填入题前括号内。
每段对话读两遍。
()1. What’s the boy’s favorite subject ?A. EnglishB. ChineseC. Music( ) 2. How often should the woman take the medicine.?A. Three times a dayB. Three times a weekC. Twice a day( )3. Why did M r Smith go to Beijing?A.To visit a factoryB. To give a talkC. To have a holiday( ) 4. Who should the man ask for help?A. Mr WhiteB. CindyC. Mr Green( ) 5. What will the man buy for his mother?A. A cakeB. A ringC. A watch第二节听下面几段对话和独白。
每段对话或独白后有几个小题,从题A、B、C三个选项中选出最佳答案,并将其标号填入题前括号内。
每段对话或独白读两遍。
听下面一段对话,回答第6至第7两个小题。
( ) 6. What does George think of the sports club?A. It’s boringB. It’s interestingC. It’s exciting( ) 7. What club does George want to join?A. The sports clubB. The music clubC. The art club听下面一段对话,回答第8至第10小题。
河北省秦皇岛文华教育2013--2014学年度第一学期期末学情诊测试题
九年级数学
题号一二三总分
得分
一、选择题(30分)
1.为了考查某地区初中毕业生的数学毕业会考情况,从中抽查了200名考生的数学成绩,在这个问题中,下面说法错误的是()
A、总体是被抽查的200名学生
B、个体是每一个考生的数学成绩
C、样本是200名考生的数学成绩
D、样本容量是200
2、抛物线y=x2-mx+m2的图象经过(0,2),则m为()
A、0
B、2
C、-2
D、±2
3、如图,平面直角坐标系中,两条抛物线有相同的对称轴,则下列关系正确的是()
A、m=n,k>h
B、m=n,k<h
C、m>n,k=h
D、m<n,k=h
4、如图,D是△ABC内一点,BD⊥CD,AD=6,BD=4,CD=3,E、F、G、H分别是AB、AC、CD、BD的中点,则四边形EFGH的周长是()
A、7
B、9
C、10
D、11
5、如图,⊙O是△ABC的外接圆,∠BAC=60°,若⊙O的半径OC为2,则弦BC的长为()
A、1
B、3
C、2
D、23
6、如图,已知圆锥的高为8,底面圆的直径为12,则此圆锥的侧面积是()
A、24π
B、30π
C、48π
D、60π
7、如图所示的二次函数y=ax2+bx+c的图象中,刘星同学观察得出了下面四条信息:(1)b2-4ac>0;(2)c>1;(3)2a-b<0;(4)a+b+c<0. 你认为其中错误的有()
A、2个
B、3个
C、4个
D、1个
8、如图,在ABCD中,已知AD=8cm,AB=6cm,DE平分∠ADC交BC于点E,则BE等于()
A、2cm
B、4cm
C、6cm
D、8cm
9、如图,矩形ABCD中,AB=3,BC=5。
过对角线交点O作OE⊥AC交AD于E,则AE的长是()
A、1.6
B、2.5
C、3
D、3.4
10、有一张矩形纸片ABCD,其中AD=4cm,上面有一个以AD为直径的圆,正好与对边BC相切,如图甲,将它沿DE折叠,使A点落在BC上,如图乙。
这时,半圆还露在外面的部分(阴影部分)的面积是()
A、(π-23)cm2
B、(π
2+3)cm2C、(
4π
3-3)cm2D、(
2π
3+3)cm2
二、填空题。
(每题3分,共24分)
11、若函数y=(m+2)x+2x-3的图象是抛物线,则m的值为___________,该抛物线开口向______。
12、将二次函数y=1
2
(x-2)2+2的图象向左平移3个单位,再向下平移4个单位,可以得
到二次函数______________________的图象。
13、为了估计湖中有多少条鱼,先从湖中捕捉50条鱼做记号,然后放回湖里,经过一段时间,等带记号的鱼完全混于鱼群中之后,再捕捞第二次鱼共200条,有10条做了记号,则估计湖里有__________条鱼。
14、如图,⊙O的半径为2,C是函数y=1
2
x2的图象,C是函数y=-
1
2
x2的图象,则阴影
部分的面积是__________。
15、如图,已知∠1=∠2=∠3=62°,则∠4=__________。
16、如图,在Rt△ABC中,∠C=90°,CA=CB=4,分别以A、B、C为圆心,以1
2 AC
为半径画弧,三条弧与边AB所围成的阴影部分的面积是__________。
17、如图,以点P为圆心的圆弧与x轴交于A,B两点,点P的坐标为(4,2),点A的坐标为(2,0),则点B的坐标为__________。
18、如图,⊙A、⊙B的圆心A、B在直线l上,两圆的半径都为1cm,开始时圆心距AB =4cm,现⊙A、⊙B同时沿直线l以每秒2cm的速度相向移动,则当两圆相切时,⊙A运
动的时间为__________秒。
三、解答题。
(共66分)
19、(10分)某菜农搭建了一个横截面为抛物线型的大棚,建立如图所示的平面直角坐标系
后,抛物线的表达式为y=-1
2
x2+2。
⑴若菜农的身高为1.60米,他在不弯腰的情况下,横向活动的范围是几米?
⑵大棚的宽度是多少?⑶大棚的最高点离地面几米?
20、(10分)如图是我市某校八年级学生为灾区捐款情况抽样调查的条形图和扇形统计图。
⑴求该样本的容量;⑵在扇形统计图中,求该样本中捐款15元的人数所占的圆心角度数;
⑶若该校八年级学生有800人,据此样本求八年级捐款总数。
21、(10分)如图所示,在△ABC中,AB=AC,D是BC的中点,连结AD,在AD的延
长线上取一点E,连结BE,CE。
⑴△ABE≌△ACE;⑵当AE与AD满足什么数量关系时,四边形ABEC是菱形?并说明理由。
22、(12分)2011年上半年,某种农产品受不良炒作的影响,价格一路上扬,8月初国家实施调控措施后,该农产品的价格开始回落,其中,1月份至7月份,该农产品的月平均价格y(元/千克)与月份x呈一次函数关系;7月份至12月份,月平均价格y(元/千克)与月份x呈二次函数关系;已知1月、7月、9月和12月这四个月的月平均价格分别为8元/千克、26元/千克,14元/千克,11元/千克。
⑴分别求出当1≤x≤7和7≤x≤12时,y关于x的函数关系式;
⑵2011年的12个月中,这种农产品的月平均价格哪个月最低?最低为多少?
⑶若以12个月份的月平均价格的平均数为年平均价格,月平均价格高于年平均价格的月份有哪些?
23、(12分)如图,AB是⊙O的直径,BC⊥AB于点B,连结OC交⊙O于点E,弦AD∥OC,弦DF⊥AB于点G。
⑴求证:点E是BD的中点;⑵求证:CD是⊙O的切线。
⑶若sin∠BAD=4
5
,⊙O的半径
为5,求DF的长。
24、(12分)如图,矩形AOCB中,点O为原点,点A的坐标为(0,8),点C的坐标为
(6,0)。
抛物线y=-4
9
x+bx+c经过A,C两点,与AB交于点D。
⑴求抛物线的函数表达式;
⑵点P为线段BC上一个动点(不与点C重合),点Q为线段AC上一个动点,AQ=CP,连接QP,设CP=m,△CPQ的面积为S。
①求S关于m的函数表达式,并求出m为何值时,S取得最大值;
②当S最大时,在抛物线y=-4
9
x+bx+c的对称轴l上若存在点F,使△FDQ为直角三
角形,请直接写出所有符合条件的点F的坐标;若不存在,请说明理由。
九年级数学参考答案一、选择题。
ADADDD DDADC 二、填空题。
⑾2,上⑿y=1
2
x+x-
3
2
⒀1000 ⒁2π⒂118°
⒃8-2π⒄(6,0) ⒅1
2
或
3
2
三、解答题。
19、⑴4
5
5米;⑵4米⑶2米
20、⑴50人;⑵108°⑶15200元
21、证明:⑴利用SAS证明全等⑵AE=2AD时是菱形
22、⑴y=3x+5 y=x2-22x+131
⑵当1≤x≤7时,y=3x+5有最小值y=8;
当7≤x≤12时,y=x2-22x+131有最小值y=10;
综上所述,平均价格最低是1月,最低为8元/千克。
⑶y=46
3
=15.3,当x=3时,y=14<15.3
∴4,5,6,7,8这五个月的月平均价格高于年平均价格。
23、⑴利用∠DAB=∠BOC证DE=BE
⑵连OD证OD⊥DC
⑶DF=2DG=24、⑴y=-4
9
x2+
4
3
x+8
48 5
⑵①S=1
2
CP²QE=-
3
10
m2+3m=-
3
10
(m-5)2+
15
2
∴当m=5时,S取最大值。
②F(3
2
,8),F(
3
2
,4),F(
3
2
,6+
7
2
),F(
3
2
,6-
7
2
)。