当堂练2
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1.吹灭蜡烛后看到的白烟是()A.石蜡固体颗粒B.氧气C.二氧化碳D.水蒸气2.把O2,CO2,N2,Cl2关在一个房子里,(假设房子里无任何气体,且绝对密闭),然后打开房顶的烟囱,谁能够先全身而退()A.O2B.CO2C.N2D.Cl23.实验室做铁丝在氧气中燃烧的实验时,不必要的操作是()A.用砂纸将铁锈擦掉B.在集气瓶内预先装少量的水C.在试验台上垫上石棉网D.在细铁丝的一端系一根火柴梗4.下列描述属于氧气化学性质的是()A.通常状况下,氧气是无色、无味的气体B.通过低温加压,可使氧气液化成淡蓝色的液体C.氧气的密度比空气大,可用向上排空气法收集D.氧气是一种性质比较活泼的气体,能氧化许多物质5.硫、木炭、铁丝三种物质在氧气中燃烧的实验中,关于三个反应叙述不正确的是()A.都是化合反应B.生成物都是气体C.都要发光、发热D.硫和木炭在氧气中实验,瓶内放水的目的不一样6.氧气的用途非常广泛.下列用途中利用了氧气能支持燃烧的性质的是()A.气焊B.潜水C.医疗急救D.动植物呼吸7.下列有关物质在氧气中燃烧现象的描述错误的是()A.镁条在空气中燃烧生成白色氧化镁固体B.铁丝在氧气中燃烧,火星四射,放出热量,生成黑色固体C.蜡烛在氧气中燃烧,发出白光,放出热量,生成能使澄清石灰水面浑浊的气体D.木炭在氧气中燃烧,发出红色火焰,放出热量,生成能使澄清石灰水面浑浊的气体8.下列物质燃烧时,既能发出白光,又有明亮的火焰的是()A.铁丝在氧气中燃烧B.镁带在空气中燃烧C.木炭在氧气中燃烧D.蜡烛在氧气中燃烧9.下列关于“物质﹣﹣在氧气中燃烧的现象﹣﹣所属反应类型”的描述正确的是()A.铁﹣﹣火星四射﹣﹣化合反应B.碳﹣﹣发出红光﹣﹣氧化反应C.硫﹣﹣淡蓝色火焰﹣﹣化合反应D.石蜡﹣﹣发出白光,瓶壁有水雾﹣﹣化合反应10.下列实验现象描述正确的是()A.红磷燃烧产生大量的白烟B.硫在空气中燃烧,产生淡蓝色火焰C.木炭在氧气中燃烧,生成黑色固体D.电解水时正极产生的气体比负极产生的气体体积多11.下列有关燃烧实验现象的描述中,错误的是()A.木炭在氧气中燃烧发出白光B.铁丝在氧气中燃烧火星四射C.硫在氧气中燃烧产生黄色火焰D.氢气在氧气中燃烧产生蓝色火焰12.下列实验现象描述正确的是()A.二氧化碳气体通入紫色石蕊试液,溶液变成无色B.硫在空气中燃烧产生淡蓝色的火焰C.镁带在空气中剧烈燃烧,发出耀眼的白光,生成氧化镁D.铁丝在空气中剧烈燃烧,火星四射,生成黑色的固体13.下列实验现象的描述错误的是()A.铁丝在氧气中燃烧火星四射B.镁在空气中燃烧发出耀眼的白光C.铜在空气中加热表面变黑D.铝在氧气中加热没有明显现象14.下列实验现象描述正确的()A.蜡烛在空气中燃烧发白光,生成水和能使澄清石灰水变浑浊的气体B.木炭在氧气中燃烧发白光,生成水C.细铁丝在氧气中燃烧,火星四射,生成黑色的四氧化三铁D.在空气中加热铜粉,生成黑色固体15.下列现象不属于镁带燃烧产生的现象是()A.发出耀眼的白光B.产生一小股白烟C.放出大量的热D.生成黑色固体16.观察、分析实验现象,可以帮助我们理解科学的本质,下列现象描述正确的是()A.钠在氯气中燃烧,可看到产生大量的白烟B.铁丝在空气中燃烧,可看到火星四溅,最后生成黑色固体C.碳在氧气中剧烈燃烧,产生白色火焰D.铁粉和硫粉混合加热后,可得到黄色固体17.下列关于实验现象的描述,正确的是()A.硫在氧气中燃烧时,发出微弱的淡蓝色火焰B.木炭在氧气中燃烧时,生成能使澄清石灰水变浑浊的二氧化碳C.细铁丝在氧气中燃烧时,火星四溅,生成黑色固体D.红磷在空气中燃烧时,产生大量白色烟雾18.下列说法正确的是()A.工业上分离液态空气法属于分解反应B.自来水可以养鱼是因为水中含有氧元素C.实验室用过氧化氢和高锰酸钾制取氧气是因为两种药品中都含有氧气D.氧气的化学性质比较活泼,能与大多物质发生化学反应19.下列说法是正确的是()A.氯酸钾中含有氧气,加热是即可放出B.空气可以发生分解反应生成氮气和氧气C.为了便于运输,把氧气溶于水制成液氧并贮存于蓝色钢瓶D.实验室制取氧气一定要用到的仪器是集气瓶20.实验室一般不能用分离空气的方法制得氧气,这是因为在实验室很难实现()A.很低的温度和很小的压强B.很高的温度和很小的压强C.很低的温度和很大的压强D.很高的温度和很大的压强二.填空题(共4小题)21.氧气是一种,的气体,它能使燃着的木条.22.氧气(填“溶”或“不溶于”)于水.23.通过改变压力和温度等条件,我们可以得到液态和固态的氧气.(判断对错)24.集气瓶中充满氧气,胶塞处装有一对石墨电极,分别接到电源的正负两极,电极之间连有一段很细的铁丝,实验时,通入20V的直流电,能够看到铁丝剧烈燃烧,对该现象的解释为.三.推断题(共2小题)25.甲同学误把H2O2溶液当作酸与Fe2O3粉末混合,发现有大量气泡产生.他联想到MnO2可作为H2O2分解的催化剂,那么,Fe2O3能否作为H2O2分解的催化剂呢?请你一起参与探究,并填写下列空白.【猜想】Fe2O3能作为H2O2分解的催化剂.【实验验证】甲同学依次设计了三个实验:实验一取一定量的H2O2溶液于试管中,观察到有极少量气泡产生,伸入带火星的木条,没有复燃.说明H2O2溶液常温下缓慢分解.实验二在实验一的试管中加入W g Fe2O3粉末,有大量气泡产生,然后伸入带火星的木条,木条复燃.说明;实验三待反应结束后,将试管里的不溶物滤出,并洗涤、干燥、称量,固体质量仍为W g.说明;【实验结论】甲同学认为,Fe2O3粉末可以作为H2O2分解的催化剂.【反思评价】乙同学认为要证明甲同学的结论正确,仅做这三个实验还不充分,需要再补充一个探究实验.探究.【拓展】下表是丙同学探究影响H2O2分解因素时所记录的部分数据,通过对数据分析,你能得出什么结论?.用足量等体积H2O2溶液制取相同体积O2所需的时间:时间(min)浓度催化剂 30%H2O2溶液 15%H2O2溶液 5%H2O2溶液加入W g MnO2 0.2 0.8 2.0加入W g Fe2O3 7.0 9.0 16.026.(2015秋•平顶山校级期中)有六种途径可以制得氧气,如图所示:(1)写出A、F两种途径的反应的方程式.A:;F:;(2)(填序号)途径发生的是物理变化;(3)为了使A、F两种途径中二氧化锰的作用是.(4)根据“绿色化学”理念,(填序号)途径是实验室制氧气的最佳方法.四.实验探究题(共2小题)27.小明同学采用如图装置用双氧水制取并收集80毫升O2,其中弹簧夹可控制气体在导管中流通或阻断.仔细如图,(甲、丙装置中均为纯水,乙锥形瓶内黑色颗粒为MnO2).请回答:(1)本实验中锥形瓶中放入的二氧化锰具有性质;(2)本实验中气密性的好坏将影响到实验是否能顺利进行,请问乙装置的气密性如何检查?.28.大约有85%化学反应需要催化剂,催化剂研究时是二十一世纪化学研究的重要课题之一.Ⅰ.某中学化学小组查阅资料发现金属氧化物A也能催化氯酸钾的分解,且A 和二氧化锰的最佳催化温度均在500℃左右.于是对A和二氧化锰的催化性能进行了定量对照实验,实验时均以收满500mL氧气为准(其他可能影响实验的因素均可忽略).表一:用MnO2作催化剂实验序号 KClO3的质量/g MnO2的质量/g 反应温度/℃待测数据1 8.0 2.0 5002 8.0 2.0 5003 8.0 2.0 500表二:用A作催化剂实验序号 KClO3的质量/g A的质量/g 反应温度/℃待测数据1 8.0 2.0 5002 8.0 2.0 5003 8.0 2.0 500请回答:上述实验中的待测数据应是;作相同的实验均进行三次的目的是;完成此研究后,他们准备发表一篇研究报告,请你替他们拟一个报告的题目:.。
三年级上册第一单元(时分秒)书写:等级:基础练习:一、填空钟面上,走得最快的是()针,它走1小格是(),走1圈是()秒,也就是()分。
秒针走半圈是()秒。
二、在()里填上合适的时间单位。
大约每天睡9()系红领巾大约需要做熟饭20()大约25()发展练习:三、谁是冠军?50米折返跑成绩表姓名小军小明小刚小亮成绩17秒15秒18秒16秒(1)谁跑得最快?谁跑得最慢?(2)你能给他们排名次吗?第二单元(两位数加减两位数)书写:等级:基础练习:54+28= 76+23= 48+29= 14+73= 74+16= 64+24 33+25= 14+37= 56+23= 23+67= 93-46= 49+15= 52-24= 38+56= 63-35= 69+25= 82-65= 56+27= 61-34= 19+26= 57-38= 发展练习:1.我想买一个游戏机和一个耳机,一共多少钱?2.通过上面的练习,你认为两位数乘两位数应该注意什么?第三单元(测量)书写:等级:基础练习:一、我会填5分米=()厘米30厘米= ()分米40毫米=()厘米2米= ()厘米90厘米=()分米100毫米=()分米6分米=()厘米5米=()厘米二、我会判(1)一条裤子长9分米。
()(2)一张床长5分米。
()(3)小明高14分米。
()(4)一支毛笔长2分米也就是20厘米。
()发展练习:三、我会分析一块黑板长3米,用5分米长的彩旗沿着黑板的长边做一条花边,需要几面这样的彩旗?书写:等级:基础练习:一、竖式计算365+43= 201+594= 297+612= 165+78= 746+268= 162+959=发展练习:二、我会思考小明从大门出发到熊猫馆至少要走多少米?书写:等级:基础练习:一、竖式计算844—21= 353—123= 278—75= 261—52= 980—76= 806—327=发展练习:二、解决问题1.一台电风扇原来卖539元,现在卖480元。
类文阅读-5 七律·长征七律·人民解放军占领南京1.解释词语。
毛泽东钟山风雨起苍黄,百万雄师过大江。
虎踞龙盘今胜昔,天翻地覆慨而慷。
宜将剩勇追穷寇,不可沽名学霸王。
天若有情天亦老,人间正道是沧桑。
天翻地覆:2.诗句中的“霸王”指的是。
3.这首诗的前四句着重于,后四句主要是,颈联是全诗的。
4.这首诗表达了诗人什么样的思想感情?【参考答案】1.形容变化巨大。
2.项羽3.叙事议论主旨和灵魂4.诗人热情歌颂了人民解放军飞渡长江天堑,解放南京,改造黑暗旧社会的光辉史实。
沁园春·长沙毛泽东独立寒秋,湘江北去,橘子洲头。
看万山红遍,层林尽染;漫江碧透,百舸争流。
鹰击长空,鱼翔浅底,万类霜天竞自由。
怅寥廓,问苍茫大地,谁主沉浮?携来百侣曾游,忆往昔峥嵘岁月稠。
恰同学少年,风华正茂;书生意气,挥斥方遒。
指点江山,激扬文字,粪土当年万户侯。
曾记否,到中流击水,浪遏飞舟?1.“沁园春”是,“长沙”是。
2.用“”画出诗句中“看”到的景色。
3.解释诗句。
曾记否,到中流击水,浪遏飞舟?4.这首词主要写了什么?【参考答案】 1.词牌名标题2.万山红遍,层林尽染漫江碧透,百舸争流鹰击长空,鱼翔浅底3.可曾记得那时我们在江水深急的地方游泳,那激起的浪花几乎挡住了疾驰而来的船?4.这首词上阕写景,下阕抒情。
上阕从岳麓山、湘江、天空、水底选取实景,远近结合,动静映照,用文字描绘了一幅湘江秋景图;下阕通过对战友和战斗生活的回忆和追述,以及不惧怕当时的大军阀敢于反抗,表现了在革命运动中也可以激流勇进,完成革命,主宰中华大地。
类文阅读-6 狼牙山五壮士赵一曼在1935 年11 月,赵一曼率领的部队被日伪军包围,她要团长带队突围,自我担任掩护,左手手腕中弹负伤。
她在村里隐蔽养伤被敌人发现,奋起迎战时左大腿骨被子弹打穿,因流血过多昏迷而被捕。
她被押到哈尔滨伪滨江省警务厅受刑后几度昏迷,仍坚贞不屈。
在她生命垂危时,日寇担心死去得不到口供,把她送进哈尔滨市立第一医院监视治疗。
六数圆柱表面积检测题班级姓名1.一个圆柱形茶叶筒的侧面积贴着商标纸,圆柱底面半径5cm,高是20cm。
这张商标纸的面积是多少?2.求下面各圆柱的侧面积。
底面周长1.6米,高0.7米。
底面半径是3.2分米,高5分米。
3.小亚做了一个底面直径8厘米,高13厘米的笔筒,她想给笔筒的侧面和底面贴上彩纸,至少需要多少彩纸?六数圆柱表面积作业班级姓名学号得分1.一台压路机的前轮是圆柱形,轮宽2m,直径1m,转动1周压路的面积是多少平方米?2.广告公司制作了一个底面半径是1m,高2.5m的圆柱形灯箱,可以贴多大面积的海报?3.一个压路机的滚筒横截面的直径是1米,长是1.8米,转一周能压路多少平方米?如果每分钟转8周,半小时能压路多少平方米?(***)月日六数圆柱表面积练习课检测题班级姓名(1)用一张长2.5米, 宽1.5米的铁皮做一个圆柱形烟筒, 这个烟筒的侧面积是多少? (接口处忽略不计)(2)一个圆柱形无盖的水桶,底面的直径是60厘米,高是40厘米,做这样一个水桶,需要多少平方分米的铁皮?(得数保留整数)(3)一个圆柱形铁皮盒,底面半径是2分米,高5分米,在这个盒子的侧面帖上商标纸,需多少平方米的纸?(4)修建一个圆柱形的沼气池,底面直径是3m,深2m,在池的侧面与下底面抹上水泥,抹水泥部分的面积是多少平方米?(5)一顶帽子,上面是圆柱形,用黑布做;帽檐部分是一个圆环,用红布做。
做这顶帽子,哪种颜色的布用得多?六数圆柱表面积练习课作业班级姓名学号得分1、一个圆柱,它的高增加1厘米,它的侧面积就增加50.24平方厘米,这个圆柱的底面半径是多少厘米?2、一根长2米,底面积半径是4厘米的圆柱形木段,把它锯成同样长的4根圆柱形的木段。
表面积比原来增加了多少平方厘米?3、学校走廊上有10根圆柱形柱子,每根柱子底面半径是4分米,高是2.5分米,要油漆这些柱子,每平方米用油漆0.3千克,共需要油漆多少千克?(***)月日六数圆柱表面积练习课检测题二班级姓名(一)填空(1)做一个底面直径是1.5米,高3米的圆柱,它的侧面最大可以张贴()面积的海报。
Unit 1 Period 2当堂训练I. 1.活动调查 2….的结果 3. 积极的 4. as for 5. most students II. 1. high 2. result, activity 3. about 4. ever . 5. timesIII. 1.The result of being late for class is serious.2. Some students exercise once or twice a week.3. A: How often do the students do homework in your school?B: Every student does it every day.4. What should you do to improve your English?5. Who is the best at English in your class?课后作业I. As for, most 2.Some, all 3. No 4. for 5. How oftenII. 1.A 2.B 3.D 4.A 5.B.III. 1.How long was 2.How often does, go 3.How much 4.many books are 5.How tallPeriod 4当堂训练I. 1. eating habits 2.try one’s best to do sth. 3. healthy lifestyle 4. get good grades5. eat less meatII. 1. healthy 2. different 3. hardly 4. to say 5. wantsIII. 1.As for, no, once, twice 2. healthy lifestyle, fruits, vegetables, hardly, junk food, sleep3.A lot of, help, keep in good health4.should try to, less exercise moreIV. 1.B 2.D 3.E 4.C 5.A课后作业I. 1.和…⼀样 2.饮⾷习惯 3.取得好成绩 4.有健康的⽣活习惯 5. 帮助某⼈做某事 II. 1. I’m pretty health. 2.I never drink coffee.3.He sleeps for 9 hours every night.4.Grandpa takes good care of his health.5. Good food helps me to study better.III. vegetables, fruit, can’t stand, milk, junk food, three or four times, coffee, sleep, 9 hours IV. 1. How hard 2.didn’t go 3.How long did, stay 4.How often does, help 5.What helpsUnit 2Period 1当堂训练I. 1.head 2.ear 3.hair 4.eye 5.nose 6.mouth 7. teeth 8.shoulder 9.throat 10.arm11.hand 12. stomach 13.body 14.leg 15. footII. 1.感冒 2.头痛 3.肚⼦痛 4.喉咙痛 5.吃药 6.see the dentist 7. drink more hot water8.have a toothache 9.lie down and rest 10.go to bed early III. matter, feel, say, take, cold, fever, should, times, hope, better 课后作业III. 1.C 2. A 3.B 4.G 5.D Period 3当堂训练I. 1.tired 2. thirsty 3. stressed 4. hungry 5.healthII. 1.When you are tired, you should listen to music.2.I’m very stressed out, and have a lot of headaches.3.I’m not feeling very well at the moment.III. 1.is playing 2. stayed 3. studied 4. am not feelingIV. 1.shouldn’t 2. should 3.may 4. had to 5. should, has to课后作业I. 1.got angry 2.is bad for 3. stressed out 4.had a cold 5.at the momentII. 1. .at the moment 2.a sore tooth 3.shouldn’t, anything 4.can’t,unitl 5.When, start III. 1.should do some conversation practice 2.are not feeling well 3.a balanced diet4. study late every night5.drink hot coffee with milkPeriod 5当堂训练I. 1.mouth 2.fever 3.believe 4.thirsty 5.courseII. 1.eat nothing 2.wrong with you 3.is unhealthy 4.a sore throatIII. 1.As for, some 2.sore back 3.once, twice 4.stay healthy 5.favorite program课后作业I. 1.hot tea with honey 2.not…any more 3.go to see the dentist 4. a balance of yin and yang5.a balanced diet6.on the other hand7.stressed out8.stay healthy9.at the moment10.feel tired 11.feel well 12.other healthy food 13.traditional Chinese medicine14.for example 15. western countries 16. conversation practiceII. 1.help, to 2.asks, to 3.eat less 4.be, make 5.important toIII. One possible version:Lily is my friend. She never exercises. She is always stressed out. She should exercise everyday. She should sleep eight hours every night. She shouldn’t just stay at home or school. She should go out with her friends. She should eat some healthy food. She shouldn’t eat too much junk food. I think it’s important to stay healthy.Unit 3 Period 2当堂训练I. 1.去购物 2. 去游泳 3.去钓鱼 4. 去远⾜旅⾏ 5. 去观光 6. 去散步 7. 去溜冰8. 去划船 9. 骑⾃⾏车旅⾏II. 1. coming 2. are going 3. swimming 4.Are, doing 5.stayingIII. DABIV. 1. famous 2. important 3. traditional 4. way 5.coffeeI. 1.散步 2.帮助我忘记烦恼 3.回到… 4.决定某事 5.考虑 6.go bike riding7. go sightseeing 8. go on vacation 9. plan to do sth. 10. go campingII. 1.for 2.next 3.going 4. long 5.toIII. 1.Are you going 2. Who are, visiting 3.Where are, going 4.What are, doing5.How long areIV. visiting her grandparents; going sightseeing in Beihai Park for five days;going bike riding in the countryside for two days; taking photos in Paris for two weeks Period 4当堂训练I. 1. plan to do sth. 2. forget all the problems 3. finish doing sth.4. in the beautiful countryside5. ask sb. about sth.II. 1. finally 2. return 3.forget 4.tourist 5.rentIII. 1.relax 2.listens 3.tourists 4.watching 5.minutesIV. 1.Where is, going 2.are going 3.How long 4.about going 5.far, from, to课后作业I. 1.What are you doing for vacation? I’m babysitting my sister.2.That sounds great! Who are you going with?3.How long are you staying there? Only four days. I don’t like leaving for too long.4.I’m going hiking in the mountains. What about you?5.Show me your photos when you return school.II. 1.quick 2.take 3.kilometer 4.leaving 5.planingIII. 1.about 2.on 3.to 4.for, on 5.withUnit 4 Period 1当堂训练I. 1.by bus/take the bus 2.by bike/ride the bike 3.on foot 4.by subway/take the subway5.by train/take the trainII. 1.does, rides the bike 2.How does, go to, drives the car, goes to work, car.III. How, but, take, How long, take, by, How far, from.IV. 1.minutes 2.hundred 3.by 4.takes 5.walk.V. 1.drives, to 2.How, do, go课后作业I. 1.How long 2.How old 3.What 4.How 5.How often.II. ABDDCIII. Where, Do, to, No, walk, it/walking, for, me/quite.IV. 1.early 2.bicycle 3.kilometre 4.station/stop 5.far. Period 3I. 1.subway station 2.train station 3.How far 4.where he lives 5.away.II. walk, don’t, ride, Sometimes, by, takes, Why, brokenwalking, health, long, minutes, better, takeIII. What, think of 2.It took him, to work 3.what Jim has for lunch 4.take the课后作业I. ABCABII. 1. How does your father go to work?2. How long does it take you to get from home to school?3. The early bus takes him to his work place.4. The bus ride usually takes about 25 minutes.5. How far is it from his home to school?III. where, bank, from, away, bus, take, stop, side, coming, welcome. Period 5当堂训练I. 1.How does, go 2.of the, go, by train 3.how long it took 4.had better not5.more careful, any other student(the other students)II. 1.far from 2.by bike, on foot 3.How, usually get/go 4.for walking5.Does, leave home at5.not goIII. CEBDA课后作业I. BCABBII. 1.relaxing 2.camping 3.takes 4.left 5.worry.III. 1. tell/show 2.see 3.far 4. About 5.take 6.should/can/need 7.take 8.long 9.get/arrive 10.forUnit 5 Period 2当堂训练I. 1.Can you come to my birthday party 2.When 3.Thursday, October 184.Seven-thirty5.Where6.I’d love toII. 1.going 2.relaxing 3.help 4.too much 5.giving.III. 1.I had a piano lesson last Thursday afternoon.2.You can help your mother do the housework.3.This is card from Ann to Jim.IV.1.Does, have 2.How does Mr Green go to England 3.When, meet.课后作业II. 1.will invite, to 2.Does, do homework 3.didn’t have, last 4.for inviting, to 5.helps, with III. speak, speaking, like,inviting/asking, start/begin, By, Sorry, take, message, pleasure Period 4当堂训练I. 1.free 2.whole 3.quiet 4.weekend 5.concert.II. 1.really 2.to study 3.having 4.waiting es.III. 1.Thank you for your invitation to visit next week.2.Why not/Shall we3.How long, take4.didn’t go, until5.too, to.IV. 1.去掉第⼀个to 2.去掉the 3.cleaning—clean课后作业I. ACDACII. 1.babysitting 2.can’t 3.fourteenth 4.not go 5.Mother’sIII. 1.Would, like 2.talk about 3.When will, beIV. 1.tomorrow 2.sorry 3.bicycle 4.clean 5.lesson.Unit 6Period 1I. smarter, sunnier, thinner, more interesting, more better.II. shorter, taller, longer.III. 1.newer 2.hotter 3.better 4.more interesting 5.easier than.IV. 1.athletic 2.funny 3.outing 4.quieter 5.differentV. 1.calmer most 2.more than 3.more outgoing than.课后作业I. BADBDII. 1.is Lily’s 2.lighter 3.more outgoing 4.good at 5.different fromIII. think, funny, popular, funnier, more popularIV. 1.than mine 2.runs faster than 3.Where are they? 4.as old as 5. How often Period 3当堂训练I. ugh at 2.be popular with 3.be good at 4.be different from 5.my best friend II. 1.subjects ugh 3.writing 4.Both 5.ways III. 1.In some ways 2.good, playing the 3.as thin as 4.three years younger 5.funny, laugh IV. Why, the same, too, else, than 课后作业I. CDCACII. 1.to carry 2.taking 3.to sleep 4.to say 5.to tryIII. make, same, as, clothes, good, grades, popular, important, friendlyIV. better, cheaper, easier, more difficult, bigger, quieter, safer, warmer Period 5当堂训练III. rger 2.Which pen 3.shorter than 4.taller 5.as interesting asIV. 1.rivers 2.another 3.free 4.weekdays 5.Though.课后作业I. CBCBCII. 1.the longest rivers 2.the taller 3.taller, taller 4.The more, the fatter 5.colder, that III. twins, same, taller, calmer, more outgoing.Unit 7Period 2I. 1.relish 2.instructions 3.blender 4.firstII. 1.roll 2.popco r n 3 . s a l t 4 . s a l a d I I I . e a t i n g , m a k e , a p p l e s , b a n a n a s , w a t e r m e l o n s , m u c h , c i n n a m o n , y o g u r t , t e a s p o o n s / p >。
先学后教当堂训练教学模式一、洋思中学教改的成功经验:先学后教,当堂训练所谓“先学”,就是在课堂上,教师先揭示课堂教学目标,提出自学的相关要求,进行学前指导后,学生带着思考题在规定时间内自学相关的内容,完成检测性的练习。
自学的形式灵活多样,可以是看例题、读课文、看注释、做实验、发现疑难做记号、做与例题类似的习题等等.所谓“后教"就是针对学生自学中暴露出来的问题及练习中的错误,教师指导学生研讨解决,教师只作评定、补充、更正,最后让学生当堂完成作业,经过严格训练,形成能力。
“后教"不是教师漫无目的的教,而是在学生充分自学后,教师与学生、学生与学生之间的互动式的学习。
“后教”的环节是:学生在自学过程中,教师通过巡视,准确掌握学生自学的情况,在学生自学结束后,发动学生通过讨论、质疑、交流等方式自行解决自学过程中暴露的问题。
让已学会的学生来教不会的学生,促使学生相互合作、相互帮助,达到“兵”教“兵”的目的.在“后教”这个环节,教师要做到三个明确:(1)明确教的内容.教的内容应该是学生自学后还不能掌握的地方,即自学中暴露出来的主要的倾向性的疑难问题,对学生通过自学已掌握的,一律不教。
(2)明确教的方式。
这个方式就是“兵”教“兵”,会的学生教不会的学生,教师只评定对不对,完整不完整,学生教的“不对"的地方,教师帮助更正,对“不完整的"教师帮助补充。
(3)明确教的要求.不折不扣达到大纲规定的要求,不能就题讲题只找出答案,而要寻找出规律,真正让学生知其所以然,还要提醒学生预防运用时可能出现的毛病,这样就从理论到实践架起一座桥梁,以免学生走弯路.所谓”当堂训练",是在“先学”、“后教”之后进行的,一般不少于15分钟。
训练分必做题、选做题和思考题,训练的内容重在应用刚学到的知识解决实际问题,创造性地“做",不搞死记硬背;训练的形式像竞赛、像考试那样让学生独立地、快节奏地完成,教师不作辅导,学生不得抄袭。
班级:姓名:一、填空1.空气是由()混合而成的。
2.()可以支持燃烧,占空气体积的()3.不支持燃烧的体积是(),大约占空气体积的()4.此外还有少量的()()等其他气体。
二、画一画1. 画出空气组成的分布图三、简答题1.现象:蜡烛熄灭后,集气瓶内会出现什么现象?2.氧气和氮气的用途?(各举2条)班级:姓名:一、填空题1.()是生活中一种常见的现象。
2.纸片燃烧时火焰的颜色(),手部感觉()。
3.物体燃烧后会产生()4.蜡烛燃烧时生成了()和()等新物质。
二、简答题1.预防烧烫伤的方法?2.烧烫伤的应急措施?第三课变色游戏当堂检测班级:姓名:一、填空1.切开的苹果放在空气中,颜色是()2.滴柠檬汁的苹果的颜色()3.将紫甘蓝汁滴入白醋中颜色呈()4.将紫甘蓝汁滴入小苏达中颜色呈()5.紫甘蓝汁里含有()二、选择题1.()切开后放置空气中会变色。
A.土豆B. 西红柿C.黄瓜2.紫甘蓝汁遇见白醋会变成绿色。
()三、简答题1.苹果变色可能与什么因素有关?变色的苹果还能恢复原来的样子吗?班级:姓名:一、填空1.()是一种常见的现象。
2.铁片的颜色是(),铁锈的颜色()3.铁生锈与()、()()有关。
4.铁片是否容易导电(),铁锈是否容易导电()。
(1容易导电、2极不易导电)5.铁比铁锈的韧性()二、选择题1.铁上抹油可以使铁()A生锈 B不生锈2.铁钉在()容易生锈A潮湿的空气中 B 干燥的空气中三、简答题1.怎样预防铁生锈班级:姓名:一、填空题1.我们听到声音需要有()及(),当声音刺激耳朵时,我们就听到声音了。
2.人体对某些()的反应,可以帮助我们应对(),趋向(),()有害的刺激,保护人体。
3.当声音很大时,我们会()二、判断题1.当声音很大时,我们会闭上眼睛。
()2.用硬东西挖耳朵,可以预防中耳炎。
()3.护目镜对人的眼睛有保护的作用。
()三、选择题1.下列选项中,()不是正确保护耳朵的方法。
A远离噪声污染 B合理使用药物C不要用淡色铅笔写字2.下列说法错误的是()A当刺激我们的耳朵是,我们就听到声音了B相同的环境刺激,人体利用不同感官产生的感觉是相同的C如果环境的刺激发生了变化,我们的感觉也会变化班级:姓名:一、填空题1.脑分为()两个半球,成人脑的重量约()克。
外研版(新标准)英语八年级下册当堂同步练习试题M1 Unit 1一、单项选择1. —3D printing could be used to build a house in less than 24 hours. —It________ amazing. It's my first time to get to know this.A. sounds B . smells C. tastes2. —What an interesting story she told us!—Yes, and her voice sounded ________.A. sweetB. smallC. clearlyD. sadly3. He likes eating ________, so he has a sweet tooth.A. sugarB. saltC. pizzaD. pie4. Would you like ________ an animal doctor when you grow up?A. beB. beingC. to beD. are5. This kind of sweaters looks ________ and sells ________.A. beautifully, wellB. beautiful, wellC. beautifully, goodD. beautiful, good6. The soup tastes ________ sour. You'd better not drink it.A. a little ofB. a bitC. a fewD. a bit of7. —What will the weather be like tomorrow?—It ________ be rainy, cloudy or sunny. I'm not sure.A. mustB. shouldC. can'tD. might8. The cake is ________;please help yourself.A. doingB. doneC. to doD. being done9. —________ exciting the speech abou t “Belt and Road” was!—Of course! It was a really great inspiration to the world.A. HowB. WhatC. How aD. What an10. —Would you like to watch the movie Dangal(《摔跤吧!爸爸》)after school?—________. I have to look after my sister.A. Enjoy yourselfB. No problemC. I'm afraid notD. It takes no time二、用所给单词的适当形式填空11. My mother wants me ____________(play) tennis with her thisafternoon.12. —How do you like the egg soup?—Mm, it ________(smell) delicious.13. There ________(be) some pizza and some cookies.14. The young woman's voice sounds ________(sweet). I like her songsvery much.15. I'd like you ____________(share) your ideas about pollution.16. Wow, everything ________(taste) so sweet and delicious!17. Yesterday Lisa passed the driving exam. What a ________(luck) dayshe had!18. The soup is delicious, but it's a bit ________(salt).19. The cake is already ________(do). Come and taste it.20. They like sweet food and drinks, so they all have a sweet________(tooth).三、用方框内单词或短语的适当形式填空21. I ____________ the magazine is Jack's because there's his name onthe cover.22. The baby is so ________ that we all like him.23. My parents think I can learn maths well, so I'm going to have a________.24. The milk tastes a bit ________. You'd better not drink it.25. I'd like an apple ________ and a glass of milk for breakfast.26. Would you like to put some strawberry________ on the bread?27. My aunt is good at making different kinds of ________ and I lovethem very much.28. My mother will stay in Beijing ________ three days.29. Beijing is one of the ________ cities in the world.30. The drink is ready, but the food isn't ________ now.四、句型转换31. The cakes are delicious. (用smell改写句子)The cakes ________ ________.32. Ford likes sweet food and drinks. (改为同义句)Ford ________ a ________ ________.33. Jill stayed in the library for two hours yesterday. (对画线部分提问)________ ________ ________ Jill ________ in the libraryyesterday?34. The cake tastes sweet. (改为否定句)The cake ________ ________ sweet.35. The cloth has a soft feel. (改为感叹句)________ ________ ________ ________ the cloth has!五、口语交际根据上下文内容,填入适当的句子。
《登泰山记》当堂练习1.下列词语中加划线字的注音全对的一组是()A. 山麓(lù)雕砌(qiè)山巅(diān)徂徕(cúlài)B. 悬崖(yá)石磴(dènɡ)须臾(yú)摴蒱(chūpú)C. 戊申(wù)岱祠(cí)姚鼐(lài)绛皓(xiáng hào)D. 膝盖(qī)石罅(xià)佝偻(lóu)若偻(lǚ)2.下列句子中对加划线词的意义解释全对的一组是()①当其南北分者,古长城也(在)②余以乾隆三十九年十二月(在)③稍见云中白若摴蒱数十立者(稍微)④世皆谓之天门云(句末语气助词)⑤及既上,苍山负雪,明烛天南(到,前往)⑥而半山居雾若带然(停留)A.①④⑥B.②③⑤C.①③⑤D.②⑤⑥3.选出没有通假字的一项()A.极天云一线异色,须臾成五采B.石苍黑色,多平方,少圜C.绛皓驳色,而皆若偻D.师者,所以传道受业解惑也4.下列句子中加划线的词语,古今意义不同的一句是()A.郦道元所谓环水也B.而半山居雾若带然C.与子颍坐日观亭,待日出D.石苍黑色,多平方5.下列各句中没有活用词的一项是()A.君子博学而日参省乎己,则知明行无过矣B.及既上,苍山负雪,明烛天南C.亭东自足下皆云漫D.未可明诏大号以绳天下之梅也6.指出下列多义词的词义。
①限:A、越长城之限()B、今所经中岭及山巅崖限当道者()C、牵牛织女遥相望,尔独何辜限河梁()D、皆不可限以时月()E、然则诸侯之地有限()②坐:A.与子颍坐日观亭,待日出()B.项王则受璧,置之坐上()C.来归相怨怒,但坐观罗敷()D.王曰:“何坐?”曰:“坐盗。
”()③阴:A、其阴,济水东流( )B、朝晖夕阴,气象万千( )C、孙膑以刑徒阴见,说齐使( )7.与“蚓无爪牙之利,筋骨之强”句式相同的一项是()A.夫晋,何厌之有?B. 余始循以入C.故今之墓中全乎为五人也D.今所经中岭及山巅崖限当道者8、选出下列有关说法错误的一项( )A.《水经注》是我国最早而又最全面、最系统且具有综合性的地理著作,作者为汉代的郦道元。
小学三年级英语(上册)能跟读出每一个句子。
2. Match and colourA. 给学生一分钟时间抓紧时间连,看看谁完成得快,并找学生校对答案,注意单词的认读,让学生勤张嘴巴,多练习。
B. 快速完成涂色。
Let’s singA. 学生拿出白纸和彩笔,教师按照歌词中出现的顺序念出颜色,请学生根据老师念出颜色的顺序在白纸上画出彩虹。
B. 教师播放歌曲,学生看着自己画的彩虹图学唱。
C.跟着录音唱两遍,由看课本唱逐步过渡到脱离课本自己唱。
四、扩展性活动(Add-activities)做配套练习册Part C,尤其是第二题圈出不同类的单词,和第三题仿照例子选一选,说一说,要让学生起来仿照例子说句子。
注意让学生自己动脑,勤张嘴,明白怎么犯的差错,为什么答案是这个并改正。
五、作业(Homework)1. 整体复习Unit2,要求学生听录音,跟读单词和句子,并在实际生活中自然使用。
2. 将颜色用英语教给家长,并制成彩虹卡片。
突破重点习题:一、选择适合的句子,将其序号填在泡泡框里。
A. This is Miss Green.B. Hello! I’m MikeC. What’s your name? I’m Sarah.D. Good morning.1 2.3. 4.二.情景练习。
( ) 1.早上,你见到你的朋友,你应该怎样问候A.Good morning. B. Good afternoon C. Good bye( ) 2.当你把你的朋友介绍给别的伙伴时,你应该说:A. Nice to meet you.B. This is Miss Green.C. I’m Miss Green ( ) 3. 你想介绍John给妈妈理解,你会说:A. Mum, this is John.B. Goodbye, John.( ) 4. 下午遇见老师,你会这样打招呼:A. Good morning.B. Good afternoon.( )5. 别人对你说Goodbye时,你怎么回答?A. Good morning.B. Bye!三、根据你听到的内容,为下面的图片圈出准确的单词。
15分钟课堂过关训练
Unit 3 What were you doing when the UFO arrived?(A)
Ⅰ.Fill in the blanks with correct forms of these words.
1.She has to look after her brother because her mother is _____(住院).
2.The girl was shopping when she saw the _____ (外星人) got out.
3.When the plane _____ _____(起飞),I felt terrible.
4.In the _____ (过去),there was no school in that village.
5.The girl was really _____ (惊恐) when she saw the snake.
Ⅱ.Choose the right answer.
1.The woman was _____ protected in a private palace.
A.safe
B.safely
C.safety
2.On Mid-autumn Festival,people might leave work to _____ with a family dinner.
A.celebrate
B.represent
C.congratulate
3.People often buy each other mooncakes _____ fruit and nuts.
A.filling with
B.fill with
C.filled with
4.I had to _____ the day _____ because I had a terrible cough yesterday.
A.leave;out
B.take;off
C.go;off
5._____ I was talking on the telephone,David came in.
A.Because
B.While
C.If
Ⅲ.Rewrite the sentences.
1.He was good at maths last year.
He _____ _____ in maths last year.
2.While I was watching TV,the telephone rang.
I _____ watching TV _____ the telephone rang.
3.Linda finished her work and went to bed.
Linda _____ go to bed _____ she finished her work.
4.Jack plays basketball better than the others in his class.
Jack is the _____ basketball _____ in his class.
5.I like fish a little,but I like chicken very much.
I _____ chicken _____ fish.
Ⅳ.Reading comprehension.
A young American doctor was sleeping when suddenly his doorbell began to ring.It was already midnight,but what could the doctor do?He had to get up,put on his coat and go downstairs.
When he opened the door,he saw a man standing with a hat in his hand.“How do you do?”said the man,“Can you come at once to a place out of town?It’s quite far but you have a car and I can show you the way.”
“Certainly,”said the doctor,“I’m quite ready.I can come at once.”After a few minutes the car was standing at the front door,the man got into the doctor’s car,and they drove off.
They drove on for a long time.Then the man said,“Here we are.This is my home.Now I can pay you and you can go back to town.”
“I must see the patient.How can I go back without seeing the patient?”
“There is no patient,”explained the man.“Nobody is ill.I live here,you see,and one must get home from a town,mustn’t he?There are no taxis this time of the night,but a doctor often makes night calls,so excuse me.Here is money.Thank you,doctor.Good night.”
1.The doctor _____ when the doorbell started to ring.
A.was sleeping upstairs
B.was sleeping downstairs
C.was working upstairs
D.was working downstairs
2.The man asked the doctor _____.
A.to go out for a walk
B.to go to a place out of town
C.to see a patient
D.to go to his home
3.They left _____.
A.on foot
B.by bike
C.at once
D.after a few minutes
4.What the man wanted to do was only _____.
A.to fool the doctor
B.to give the doctor money
C.to get home in the doctor’s car
D.to play a joke on the doctor
5.The doctor was _____ when he heard the man’s words.
A.happy
B.angry
C.sad
D.sorry
参考答案
Ⅰ.1.in hospital 2.alien 3.took off 4.past 5.scared
Ⅱ.1~5 BACBB
Ⅲ.1.did well 2.was;when 3.didn’t;until 4.best;player 5.prefer;to Ⅳ.1~5 ABDCB。