2011初二暑假作业答案--英语

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第一篇:2011初二暑假作业答案--英语

练习一

present;since;doctor;pollution;open;D;A;B;A;C;B;B;AD;B;was taught;married;swim;came;have been;have lived;was.练习二

changes;seen;in fact;marry;southern;had fun;won't until;have been married;has kept;different from A A D B D A B B 练习三

possible;service;althgough;attraction;present;have;since;How many;When buy;Have carried;been;hasn't;sad;去掉but;yet;next to;has been opened;any longer;how to get;It's to read;It is came;but came;have known;are fond of 练习四

CBACCB;not arrived;yet;How long;heard;Has ever been;Has changed;yet;I have lived here since I was born.It's pleasant to play Chinese chess with my classmates.Although Tom was ill,he went to school.Where is Marry? She has gone to the cinema;Have you been to Beijing?Yes I have.I used to play computer games,now I don't do it.练习五

a theme park;fast food;wave to us;get married;during the summer holiday;move at high speed;feel excited;the whole day;go sight-seeing;wait for an hour;stop taking photos;have gone to Shanghai;have been to Shanghai;on the second day;

careful;carefully;helpful;helpfully;hopeful;hopefully;wonderful;wonderfully;noisy;noisily;healthy;healthily;lucky;luckily;shiny;shinily;impolite;impossible;unkind;unpleasant;cheerless;harmful;different;present;cross;lovely;present;pleasant;of course;go back;performance;sailing;development;closing;education;feeling;discussing;meaning 练习六

have seen;saw;were doing;was helping;do;was watching;knocking;were knocking;were making;didn't stop;to read;were dancing;not to take;were clapping;was marching;

The souvenirs are so expensive that I can't buy it.He is rich enough to travel around the world What were you doing when he arrived?

Daniel was swimming in the lake at noon yesterday;

useless;delightful;as;frightened;Italy;happily;meaning;exciting;screamed 练习七

outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD 练习八

has been away from Shanghai for two days.can't stop taking photos with them because they look very cute.have been in HongKong for a week have gone to Hongkong twice has gone to Hongkong been away for two days

is quite different from that in Beijing never forget the meaningful experience did you come back from HongKong

arrived here the day before yesterday, I have been back for two days.练习九

information;change;enjoy;screen;soon;short;repair;is designed by;e-dog for;wasn't evening;has been for;important;used;to go;sold;more;libraries;made;will replace;pleasure;to buy 练习十

ABBBDCDA

funny;printer;designed;looking;written;correctly;educational;knowledge;passed;

at the same time;come out;send e-mails;get a point;order a set on the Internet;coulds with different colours;play a role;have a dream;many places of interest;be sold out;search for information;a remote control;word-processing;a ten-year-old boy;play a role of;fall asleep;be used widely;double-click on the icon;

What do you usually use the computer do The computer is designed for students

Can I help you? I'd like to buy a personal computer She will help you when necessary 练习十一

was left;is double-clicked;is produced;is put;to keep;BBBCA 练习十二

levels;character;uses;village;jump;goal;ask;knowledge;needs;designed;written;starting;has worked;is caught;are marked;typing;was broken;was lost;is made;is used;be clicked 下题 略

练习十三

searched for;wasn't found;so that can't take;was made to move;has taught for;some photos was for;

The words he said sounded exciting;

This kind of newspaper comes out once a day.I played a role of a English teacher in my dream.The new educational CD-ROMs are sold out.The CD-ROM can be used to test your English vocabulary.reading;who;richest;about;how;have;on;take;interested;lesson;treasure;covered;set;vocabularies;producer.练习十四 most exciting;months;donating;organization;duties;introducing;decision;was held;to organize;to come;called;

Why don't you join;chose he to be the host of the charity show;

to work for the Project Hope;There is no time to wait;at the right time;must practise more;seemed to happen so quickly;advertise on the Internet;make lots of noise;Spring Bud project 练习十五

because of the heavy rain;didn't start working;What was;How did Ricky feel in the charity show;It is fun to 注 A:because B because of ABABABAB BFAGD 练习十六

B 去掉a;C to;C success;C because of;A hope to BBCBACAABC 练习十七

voluntary;international;rest;advertisement;education;kindness;operations;people;donations;collection

entrance;audience;seats;curtain;light;stage;microphone;performer;clapped;exit

cases of blindness;train the local doctors and nurses;a flying eye hospital;keep on working;be grateful to sb;perform operations;affect sixty per cent of students;have some pocket money left;be proud to dosth.;trat and cure eye problems;be able to buy the medicine;get education;raise money for charities;donate money to 练习十八

international charities;help poor people;take action to do sth.;mind others;be in hosipital;voluntary doctors;pocket money;organize events to raise money;set up UNICEF;spend money on

advertisement;operation;development;education;kindness;sickness;flying;teaching;organization;tratment;BBADCCCBCCBCBADA 练习十九

BCADE;

charity;eye;cured;prevented;operated;operations;see;local;skills;knowledge;support

It was started on 11 September,1961

It works to save the earth and its environment Volunteers and donations.To stop air pollution,protect the earth forests and save all plants and animals.In China,it works to save the panda from dying out.In South America, it works to save the Amazon Rainforest ABCCA 练习二十

连线不太好发,省去吧

performing an operation;pocket money;operated on;medical tratment;used to;were grateful to;Is used to;a flying eye hospital;had a big lunch;cases of blindness;

too weak to;used to get;isn't used to;Did use to watch;used to be;is used;isn't cheap enough BCDAC BCABA CCBCA

练习二十一

agreement;gladness;collection;illness;prevention;advertisement;development;decision;kindness;gentleness;sadness;sickness;education;organizagtion;improvement;usefulness;movement;happiness;

has cured illness;poor areas for medical tratment;is performing operation on;proud have helped;you keep doing;grateful to because of donations;used to drink;Used to;have lived am used to;used to live;are used to living;operating;attacks;patient;improving;blind;care;indeed;education;international;medical;

B be;C going;C blindness B not;A are;B drink

练习二十二 CBEADF careless;the longest;itself;elderly;tree planting;unable;further;busier;

BBCBCCCBBD 练习二十三

join;tough;trail;aim;experience;happen;develop fund-raising spirit;improve;excellent;violin;Februally;experience;especially;record;singing;writing;is held;join;to raise;has been built;to slove;was singing;called;playing;

去掉it;去掉been;across----cross;finished---been over;because of;helping;drinks;drinking;bringing;but去掉

练习二十四

don't;will;It difficult to;more any other;How can help;will be recorded;with;For;without;on;in;of;By;to

It's wrong to look down on poor people.It is a good season for us to enjoy the beautiful view.It's necessary to be careful when you cross the road.Don't miss the chance you should help each other;It's important for children to have support from parents

第二篇:初二暑假作业本分英语答案

southern 三

英语

练习一

present since doctor pollution open 二

DABACBBADB 三

has taught married swim

came;has been have lived;was 练习二

changes seen actually marry

enjoyed;ourselves won''t;until have;been;married has;kept great;changes 三

AADBDABB 练习三

present service although attraction present 二

have;since How;many When;buy Have;carried

got改成been

didn''t go改成hasn''t gone sadly改成sad but去掉

already改成yet 四

next;to has;been;open any;longer how;to;get It''s;to;read It;is;came but;came have;known borrowed;from 练习四

CBACCB 二

not;arrived;yet

How;long;been How;long;heard Has;ever;been Has;changed;yet 三

I have lived here since I was born.It''s very pleasant to play Chinese chess with my classmates.Although Tom was ill,he still went to school.Where''s Mary?She has gone to the cinema.Have you ever been to Beijing?Yes,I have.I used to play computer games,but now I don''t play it.练习五

a theme park fast food wave to us get married during

the

summber hoilday move at

high

speed feel excited

the whole day go to visit wait for an hour stop taking

photos have

gone

to

Shanghai

have been to

Shanghai on the second day 二

careful;carefully helpful;helpfully hopeful;hopefully wonderful;wonderfully noisy;noisily healthy;healthily

lucky;luckily shiny;shinily 三

(1)

impolite;impossible;rude;unpleasant;

sad;harmful;different;present(2)

although;lovely;present;joyful;sure;go back(3)

performance;sailing;development;closed;

education;feeling;discussed;meaning 练习六

have seen;saw were;doing was helping;do was watching;knocking were making;stopped;to read Were;dancing not to take

were

clapping;were marching 二

The souvenirs are so expensive that we

can''t

buy

them.He is too rich to travel around the world.What were you doing when he arrived? Daniel

was

swimming in the lake

at

noon

yesterday.三

useless delightful as

fat Italy hard meaning exciting screamed 练习七

opposite;morning;called;office;surprised;tickets;by;cinema;themselves;taken 二

CACADBACBA 练习八

一 has been away from

Shanghai

for two days 2 couldn''t stop taking

photos with them because they look good and cute 3 have been in Hong Kong for a week have been to Hong Kong twice 5 has gone to Hong Kong has been away for two days 6 is quite different from that in Beijing 7 never forget this meaningful experience 8 did you come back from Hong Kong

arrived the day

before yesterdsy,I have been here for two days 练习九

information change

enjoy screen soon restart 二

was;designed;by e-dog;for wasn''t;evening has;been;for 三

important;useful;to

go;sold;more;libraries;made;replac

e;pleasure;to buy 练习十

ADBCDBDA 二

interesting printer designed looking written correctly educational;knowledge passed 三

at the same time come out send and receive e-mails get a point order a package online

different clouds play the role have a dream many places of interest be sold out search for information the remotor control word processing a ten-year-old boy play the role of fall asleep be used widely double-click on the icon What do you usually use computer for This computer is especially designed for

students What

do

you

want to buy I want to buy a personal

computer She will help you when necessary 练习十一

was left

has been double click

has been produced

is;put

to keep

BCDBB

练习十二

第三篇:初二年级英语暑假作业答案

初二年级英语暑假作业答案

第1版暑假作业(一)A篇1-5BCBAD B篇1-5BAADC C篇1-5CEADB 第2版暑假作业(二)词汇运用

I.1.around2.show3.together4.article5.bad-tempered II.1-5ACDBC III.1.wallet2.imagine3.storm4.excuse5.waves 6.smile7.strange8.vehicle9.smell10.note

IV.1.death2.colourful3.popularity4.costs5.amazed

6.charities7.funny8.succeeded9.exactly10.expression V.1.line2.instead3.history4.repaired5.pale 6.topic7.trick8.end9.Though10.jacket VI.1.Forexample2.aroundtheworld3.inorderof 4.goeswrong5.laughat 句型演练

I.1.Iforgotwhattobuyatthesupermarket.2.Youmustallowyourmindtohaveenoughrest.3.AgoodwayofimprovingEnglishistoworkhard.4.Howcanwemakeourmemorybetter? 5.HowmanycartoonsweremadebyMrHillintotal? II.1.fullof 2.comeat6o’clock 3.unhappy;wrongwith 4.stopped/kept;fromgoing 5.boringtowatch 6.paintthewallblue 7.areconnectedby 8.gets;intotrouble 9.payattentionto 10.onscreen 第3版暑假作业(三)语法篇

I.1.longer2.toclean3.tolisten4.plays5.are 6.tostop7.wontfeel8.open9.mend10.terribly II.1-5DDBAC6-10BCDBA III.1.likeeating2.agreat/bigsuccess3.alwaysasking 4.angrywith5.complainabout;stopsworking

6.tofinish;towork7.tokeep;quiet8.wasshown;the1950s 9.tolaughat10.introublewith IV.1.memory2.old3.their 4.toprotect5.hearabout 6.recently7.like8.iscaused9.questions10.first I.1-5DAACB6-10BDABC II.1.in2.nice3.become4.alone5.looked 6.if7.stood8.how9.surprised10.agreed III.(A)1.wrong2.pass3.how4.for5.learnfrom(B)1.that2.what3.seeing/watching4.name 5.Have6.plays7.stars8.his9.lend 10.for(C)1-5DFABE IV.Onepossibleversion:

Manyteenagersaregettingfatterandfatternowadays.Beingtoofatisnotgoodforthem.Therefore,moreandmoreteenagerswanttoloseweight.Hereissomeadviceforthem.First,theyneedtochangetheireatinghabits.Forexample,theycanhavesomesoupbeforemealsbecausethiscanmakethemfeelfulleasily.Itsalsoimportanttoeatslowly.Thefastertheyeat,themoretheywanttoeat.Second,theyshoulddomoreexercise,suchasrunningandswimming.Finally,theyshouldkeepitupandnevergiveup.第5版暑假作业(五)A篇1-5DACCB B篇1-5BDCAC C篇1.aretogether2.problems3.caringfor 4.howtoshare5.believe 第6版暑假作业(六)词汇运用

I.1.improve2.lifeless3.flood4.prefer5.atmosphere II.1-5CCADB III.1.pollution2.confident3.Steam4.state5.cause 6.climate7.sightseeing8.solve9.sunlight10.view

IV.1.educational2.doesntturn3.arrival4.tosupport5.speaking 6.thought7.deeply8.protection9.toread10.more V.1.information2.habit3.member4.host5.aim 6.exchange7.passport8.result9.square 10.environment VI.1.putout2.learntabout3.sincethen 4.intheformof5.takeaction 句型演练

I.1.MrWustartshisdaybytakingacoldshower.2.Wedidntgofishingbecauseofthewind.3.Shedoeseyeexercisessothatshecanprotecthereyes.4.Thestudentexchangegivesyouachancetolearnanewlanguage.5.Millieissuchaclevergirlthatsheisgoodatallsubjects.II.1.tookmany/alotofphotos2.torise3.assoonaspossible 4.strongenoughtostop5.keep/stop;fromgetting 6.keepsintouch7.alltheway8.aswellas 9.somany;that10.lookingforwardtoworking 为大家推荐的初二年级英语暑假作业答案,还满意吗?相信大家都会仔细阅读,加油哦!

2016学年初二英语暑假作业练习题

八年级英语暑假作业答案精编

第四篇:初二暑假作业答案

初二暑假作业答案

暑假作业一 运动和声

一.导学点拨

1、自然科学

2、哥白尼

3、伽利略

4、牛顿

5、校准测量工具,改进测量方法,选用精度高的测量工具,多次测量取平均值

6、参照物

7、速度,v

8、v=s/t,m/s

9、振动,停止

10、介质,真空中,介质

11、障碍物,回声

12、音调,响度,音色

13、频率,幅度,远近,品质与特性

14、在声源处减弱,在传播过程中减弱,在人耳处减弱 15、20Hz-20000Hz,超声波洗牙等 二.必做作业

1、A

2、A

3、B

4、B

5、C

6、A

7、C

8、产生

传播

9、反射,空气10、3.10 三.选作作业:(1)0(2)不变(3)A(4)320

2、B

暑假作业二 多彩的光

一.导学点拨

1、同种均匀介质

3×108m/s

2、略

3、镜面反射,漫反射

4、正,虚,相等,相等,垂直

5、光的反射

6、斜射,改变

7、红-绿-蓝

8、透过,反射,黑,白

9、凸透镜,会聚,凹透镜,发散

10、焦点,焦距

11、凸透镜,2倍焦距,倒立,缩小

12、倒立,放大

13、凹透镜,凸透镜,平面镜

14、凹透镜,凸透镜

15、倒立,缩小,实像 二.必做作业

1、C

2、A

3、C

4、C

5、B

6、B

7、月亮

8、折射,反射,折射,直线传播 9~

12、略

13、同一高度,光屏上的像,a,b,c

暑假作业三 质量和密度

一.导学点拨

1、物质的多少 m

2、基本属性

形状 状态 所处空间位置

3、kg g、mg等4、1500 350

5、kg g

6、天平

7、水平

游码平衡螺母 左

8、密度

9、kg/m3 g/cm3 10、7.9 11、5

0.8×103kg/m312、20×103kg/m3 13、3:2 3:2 二.必做作业

1、C

2、C

3、硫酸,酒精,水

4、(1)托盘天平,量筒,空烧杯,盛有盐水的烧杯

3(2)A-D-C-B(3)ρ=(m1-m2)/V 5、179.4g,80,2.24×10,偏小

6、质量 杠杆的平衡条件 391.60 中-后-前

37、空心,10cm,64g 三.选做作业:用刻度尺测出OE的长度L,表达式:ρ油=ρ物(L0-L)/L0

暑假作业四 熟悉而陌生的力

一.导学点拨

1、一个物体对另一个物体的作用

2、大小,方向,作用点

3、相互的,形状,运动状态

4、弹簧测力计,弹性限度内弹簧形变量与所受拉力成正比

5、零刻线,量程,N

6、G

7、质量,G/m,地球上物体所受重力与质量的比值

8、竖直向下

9、作用点

10、相反

11、压力,粗糙 二.必做作业

1、C

2、D

3、C

4、B

5、C

6、相反,匀速直线,平衡力,1.6,1.6

7、(1)天平,弹簧测力计(2)物体所受重力的大小跟它的质量成正比,其比值恒定,为9.8N/kg(3)武汉和上海,纬度差异,质量

8、(1)同意,质量增大为原来的几倍重力也增大为原来的几倍,(2)0-5;0.2; 2;(3)如图所示;(4)正比;(5)不能.

暑假作业五 力与运动

一.导学点拨

1、外力、匀速直线运动、静止、一切物体

2、实验事实、推理、实验

3、共同作用、合力、力的合成4、这两个力的大小之和、方向

5、这两个力的大小之差、较大的力

6、匀速直线运动、静止状态、平衡、平衡、同一物体、同一直线、方向相反、大小相同 二.必做作业

1、形变、运动状态的改变

2、相互的、惯性

3、大4、10、10

5、加速、不是

6、B

7、C

8、C

9、D

10、B

11、D

12、C

13、A

14、C

15、A

16、A

17、C

18、相等、旋转一个角度、作用在同一物体上、避免卡片自身重力影响实验

暑假作业六 压强

一、导学点拨

1、垂直作用于物体表面上的力、垂直于物体表面

2、压力、受力面积

3、压力与受力面积上的比、p=F/S、帕斯卡(帕,Pa)

4、减小受力面积、增大压力、增大受力面积、减小压力 二.必做作业

1、受力面积

2、压强

3、减小、增大4、6x104、2.5x105、变大5、2:

3、4:9

6、D

7、B

8、C

9、D

10、C

11、受力物体的形变程度、手里物体不同、等于、选择容易形变的相同受力物体

12、受力面积一定,压力越大,压力作用效果越明显、甲丙、没有控制压力一定13、600、0.02m2、3.2 x104 14、2 x104 N、2t

暑假作业七 液体压强、大气压强与流体压强

一、导学点拨

1.(1)各个方向、密度、增大

(2)同一深度各个方向的压强相等

球实验、托里拆利

3.1.013x105、760 4.小

2.马德堡半二.必做作业

1.A 2.A 3.C 4.B 5.C 6.A 7.C 8.A 9.A 10.C 11.C 12.压强、增大13.连通器、压强减小 14.PA>PB>PC 15.低、大于 16、400

17、小、相平、深度、大、不变、相等 19.4.8N 2.5 x103

暑假作业八 浮力 一.导学点拨

1.竖直向上、浮力、竖直向上、气、液

2.等于、重力、G排、m排g、****、液体密度、物体排开液体体积、深度

3.>、>、=、>、=、=、<、< 4.液体密度、浮沉条件、漂浮、等于、小、大、小

5.自身重力 二.必做作业

1.D 2.B 3.A 4.B 5.D 6.B 7.A 8.D 9.A 10.C

11、增大物体排开液体体积、2 12.>、= 13.变小、变大 14.10、上浮、6 15.1、下沉、密度 16.不变 17.<、<、=、<、<、< 18.80、下沉

319.(1)2400N(2)0.3m

暑假作业九 杠杆、滑轮

1、D

2、B

3、A

4、A、1:4

5、= 6、730N,0.6

7、C

8、B 9、150

10、略

11、C

12、省力,20 13、240,石头前移或手后移

14、C

15、D

16、B

17、D 18、1000,500 暑假作业十 功和功率、机械效率

1、A

2、C

3、D

4、A

5、A

6、C

7、C

8、B

9、D

10、D

11、B

12、D

513、C

14、B

15、甲 2.1×10

16、C

17、C 18、10,1,0

19、(1)货物的重力2000N;(2)叉车对货物做功的功率400W.20、75%

暑假作业十一 机械能

1、动,势,弹性势,机械能

2、机械能,重力势能

3、减小,减小

4、弹性势能,动能

5、D

6、A

7、D

8、B

9、A

10、B

11、C

12、B

13、A

14、A

15、D

16、D

17、(1)小球推动木块移动的距离;(2)使小球从同一高度静止滑下;

(3)结论是:质量相同时,速度越大,动能越大;速度相同时,质量越大,动能越大;

18、速度不同;根据机械能守恒,从近地点到远地点卫星的势能增大,动能减小,所以速度减小

暑假作业12 小粒子与大宇宙

1、B

2、D

3、D

4、D

5、A

6、D

7、C

8、A

9、C

10、B

11、B

12、D

13、D

14、小于;空隙

15、扩散;加快

16、分子在不停的做无规则运动

17、分子的运动,光的反射

18、(1)1(2)0.7,下(3)1000(4)分子引力

19、(1)猜想:温度越高,分子运动越快

(2)实验:取相同体积的冷水和热水,分别滴入相同体积的墨水,观察哪杯液体扩散更快。

暑假作业十三 温度与温度计、熔化与凝固

一、导学点拨

第一节:1:固态液态气态,固体液体气体,物态变化

2、(1)冷热程度,t,摄氏度,℃(2)0℃,100℃(3)37℃,37摄氏度(4)﹣218℃(读作:零下218摄氏度或者负218摄氏度),2500℃,6000℃

3、(1)热胀冷缩(2)量程,分度值(3)浸没,容器底,容器壁,稳定,相平

4、略

第二节:

1、(1)液,固,熔化(2)熔化,凝固(3)C

2、(1)晶体:金属、冰、食盐、石墨;非晶体:石蜡、塑料、玻璃(2)不变,熔点,升高,吸(3)有无固定熔点(4)略(5)凝固,熔化,温度不变

二、必做作业:

1、3,液泡没浸没,视线未水平

2、熔化吸热,凝固放热

3、C

4、A

5、D 6、80.5,80.5,晶体,固态、液态、熔化,4,吸,凝固,固液共存

暑假作业十四 汽化与液化、升华与凝华、全球变暖与水资源危机

一、导学点拨

第三节:

1、液态、气态、气态、液态,略(参见课本)

2、(1)做功,热传递(2)表面,内部,吸热,不变,费电,100,78,越高

3、不是,蒸发,任何,表面,温度越高,质量越大,表面空气流速越快,吸热,降低,略

4、略(参见课本)

第四节:1(1)固态,气态,气态,液态,略(2)吸热,放热

2、升华,凝华,升华

3、熔化汽化升华,凝固液化,凝华

二、必做作业

1、汽化,液化、凝固,液化

2、汽化吸热,水蒸气液化放热

3、C

4、ABC

5、C

6、温度,99,不变;吸收,损失

7、升华,凝华,液化,熔化

暑假作业十五 物体的内能

一、导学点拨

1、(1)分子,永不停息地做无规则运动,动能,引力,斥力,势能(2)动能,势能,焦耳,J(3)温度,不为0

2、做功,热传递(1)增加,机械能,内能,减小,内能,机械能(2)低温,略(参见课本)

3、(1)内能,J(2)热量,降低,减小,热量,升高,增加,转移,能量

二、必做作业

1、所有分子,无规则,势能,无规则,引力,斥力,内能

2、内能,内能

3、增大,热传递

4、内能,升高,热传递

5、热量,温度,内能

6、C

7、C

8、D

9、D

暑假作业十六 物质的比热容

一、导学点拨

31、没题

2、(1)热量,比热容,c,J/(kg·℃),焦每千克摄氏度,特性,4.2×10 J/(kg·℃),略(仿写不可能不会吧?)(2)物质种类、质量、温度变化量,比热容,质量,物体的初温,物体的末温,cm(t2-t1),cm(t1-t2)(3)水

3、冷却发动机,取暖,保护秧苗防止冻伤,计算题略

二、必做作业

41~6:DBADCB 7、4.2×10,热传递,小于

8、质量,质量相同的水和没有,升高相同的7温度,水吸收的热量更多 9、3.7×10J 暑假作业十七 内燃机 热机效率

一、导学点拨

1.机械

内燃 气缸内

吸气 压缩 做功

排气

压缩

做功 2.排气

3.化学 ;化学;内

4.噪音 ;废气

5.3.4×107

完全燃烧1Kg的木炭放出的热量是3.4×107J

6.用来做有用功的 ;燃料完全燃烧 ;25%;1.65×107

二、必做作业

1.A; 2.D; 3.C; 4.A; 5.D; 6.C; 7.C; 8.B; 9.ACD;10.C;

11.D;

12.C;

13.C;

14.B

15.内; 机械; 内;16.压缩; 做功;

17.内; 比热容; 小;

18、(1)6.3 ×107 J

(2)2.04×108J

(3)31%

19、1.008×109 J 16 m3

暑假作业十八 电是什么

一.导学点拨

1、吸引轻小物体;摩擦起电;接触带电

2、(1)同种;异种 ;两种(2)同种

3、丝绸 ;玻璃棒;毛皮;橡胶棒

4、排斥 ;吸引

5、同种电荷相互排斥

6、转移

二、必做作业

1.C; 2.ABC; 3.B; 4.C 5.C 6.C 6.异; 摩擦起电;

7.同种; 摩擦起电; 电子;

8.正; 排斥;9.正; 负; 负;

10.吸附在塑料梳子上; 带了电; 吸引轻小物体;11.负; 正; 12.吸引轻小物体; 红外线; 漫; 气体流速大,压强小;13.电; 力可以改变物体的运动状态; 大于;

14.正; 排斥;

15.同种电荷相互排斥

小球和竖直方向夹角与什么因素有关?

暑假作业十九 让电灯发光

作业17内燃机 热机效率 答案 作业18 电是什么 作业19 让电灯发光 一.导学点拨

1、电荷;定向;有电源 ;电路是通路;正;正极;负极 自由电子;相反

2、(1电能

其它形式

3、电源

开关

用电器

导线;正

;没有;

电源

没有

电源 ;电源

二、必做作业

1.B; 2.C; 3.C; 4.A; 5.A;

6、B

7、B

8、C

9、C

10、石墨能导电,使电源短路

11、相反

12、D

13、灯丝断了

电池没电了 开关开路……

暑假作业二十 连接串联电路与并联电路

一.导学点拨

2、逐个顺次;正;一条;负 串

3、并列 ;多;能;整个;本条支路;互不

二.必做作业

1、正;定向;正;负

2、电源

通路

3、圈M(☺)

4、L2

L3;串; L1

L2; 并

5、S2 ; S1 S3; L1

L2;S2 S3

6、D

7、A

8、B

9、略

10、A

11、并;并;串。

第五篇:2015初二语文暑假作业答案

2015初二语文暑假作业答案

3.2010年4月,国家出台了国策十条,要努力改善百姓居住条件。杜甫的《茅屋为秋风所破歌》中的“______________________,_______________________!”就表现了这种美好愿望。(2分)4.下列句子没有语病的一项是()(2分)A.在当前的国际竞争中,我们所需要的,一是勇气,二是智慧。

B.国家出台严厉的“国八条”楼市调 控措施,是因为楼价问题突出的原因。

C.我们要善于运用材料、积累材料、整理材料,才能写好作文。

D.长城连绵万里,雄伟壮观,是我国劳动人民智慧和汗水的结晶,是祖国的天然屏障。

5.下列标点符号使用有错误的一项是()(2分)A.自联军空袭利比亚以来,已造成许多平民伤亡。人们不禁怀疑,是保护平民,还是另有所图? B.我这个人到了陌生的地方就容易晕头转向,不知道哪是东,哪是西。

C.为了援助灾区,人们连夜送去了棉衣、毛毯、药品、食物、与大量建材。

D.双汇集团被曝收购“瘦肉精”猪肉以来,其宣传的“十八道检验,十八个放心”遭到质疑。

6.将下段文字后的几个句子填入文段空缺处,正确的排序是____________(2分)这是怎样亲近、怎样金碧辉煌的明月啊!______________________我陶醉在这金色的梦中了,①她的金色的柔光滟滟地泻在广袤的大地上,远近的房屋、树梢、山影、水痕,全都泛出了浅金色的光芒。

②她又是那么圆,圆得似乎要凸出来、蹦出来了。

③她低低的挂在澄净如洗的空中,离我那么近,仿佛一伸手便可以摘下。

④我狂喜地望着这神奇的月色,仿佛走进了金色的梦境,一切都闪闪烁烁、蓬蓬勃勃的。

⑤一阵微风吹过,四野的金光便闪闪滚动起 来!

如果你是鱼儿,那快乐就是一汪清凉清凉的水;如果你是小草,那快乐就是一束暖暖香香的阳光;如果你是_______________________,那快乐就是_______________________。

8.下列对课文内容理解不正确的一项是()(2分)A.《敬畏自然》从总体上理性地思考人与自然的关系,提倡一种新的理念:敬畏自然,就是敬畏我们自己。B.散文《云南的歌会》描写了三种不同场合听到的民歌演唱,演唱方式和内容都不相同,由衷地表达了作者的赞赏之情。

C.《小石潭记》中,柳宗元虽然在对小石潭自然风景的描绘中,没有融会自己的身世遭遇、思想感情,但是,在文章的议论部分却寄喻自己的不幸遭遇,倾注怨愤抑郁的心情。

D.《岳阳楼记》超越了单纯写山水楼观的狭小境界,将自然界的晦明变化、风雨阴晴和“迁客骚人”的“览物之情”结合起来写,从而将全文的重心放到了政治理想方面,扩展了文章的境界。

以上就是为大家提供的初二语文暑假作业答案,大家仔细阅读了吗?加油哦!

暑期作业语文八年级下册(阅读)

初二年级下册语文暑期作业练习

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