第一篇:2011初二暑假作業(yè)答案--英語
練習(xí)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.練習(xí)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 練習(xí)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 練習(xí)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.練習(xí)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 練習(xí)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 練習(xí)七
outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD 練習(xí)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.練習(xí)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 練習(xí)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 練習(xí)十一
was left;is double-clicked;is produced;is put;to keep;BBBCA 練習(xí)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 下題 略
練習(xí)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.練習(xí)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 練習(xí)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 練習(xí)十六
B 去掉a;C to;C success;C because of;A hope to BBCBACAABC 練習(xí)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 練習(xí)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 練習(xí)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 練習(xí)二十
連線不太好發(fā),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
練習(xí)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
練習(xí)二十二 CBEADF careless;the longest;itself;elderly;tree planting;unable;further;busier;
BBCBCCCBBD 練習(xí)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
練習(xí)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:初二暑假作業(yè)本分英語答案
southern 三
英語
練習(xí)一
一
present since doctor pollution open 二
DABACBBADB 三
has taught married swim
came;has been have lived;was 練習(xí)二
一
changes seen actually marry
二
enjoyed;ourselves won''t;until have;been;married has;kept great;changes 三
AADBDABB 練習(xí)三
一
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 練習(xí)四
一
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.練習(xí)五
一
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 練習(xí)六
一
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 練習(xí)七
一
opposite;morning;called;office;surprised;tickets;by;cinema;themselves;taken 二
CACADBACBA 練習(xí)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 練習(xí)九
一
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 練習(xí)十
一
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 練習(xí)十一
一
was left
has been double click
has been produced
is;put
to keep
二
BCDBB
練習(xí)十二
一
第三篇:初二年級英語暑假作業(yè)答案
初二年級英語暑假作業(yè)答案
第1版暑假作業(yè)(一)A篇1-5BCBAD B篇1-5BAADC C篇1-5CEADB 第2版暑假作業(yè)(二)詞匯運用
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 句型演練
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版暑假作業(yè)(三)語法篇
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版暑假作業(yè)(五)A篇1-5DACCB B篇1-5BDCAC C篇1.aretogether2.problems3.caringfor 4.howtoshare5.believe 第6版暑假作業(yè)(六)詞匯運用
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 句型演練
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 為大家推薦的初二年級英語暑假作業(yè)答案,還滿意嗎?相信大家都會仔細(xì)閱讀,加油哦!
2016學(xué)年初二英語暑假作業(yè)練習(xí)題
八年級英語暑假作業(yè)答案精編
第四篇:初二暑假作業(yè)答案
初二暑假作業(yè)答案
暑假作業(yè)一 運動和聲
一.導(dǎo)學(xué)點撥
1、自然科學(xué)
2、哥白尼
3、伽利略
4、牛頓
5、校準(zhǔn)測量工具,改進測量方法,選用精度高的測量工具,多次測量取平均值
6、參照物
7、速度,v
8、v=s/t,m/s
9、振動,停止
10、介質(zhì),真空中,介質(zhì)
11、障礙物,回聲
12、音調(diào),響度,音色
13、頻率,幅度,遠近,品質(zhì)與特性
14、在聲源處減弱,在傳播過程中減弱,在人耳處減弱 15、20Hz-20000Hz,超聲波洗牙等 二.必做作業(yè)
1、A
2、A
3、B
4、B
5、C
6、A
7、C
8、產(chǎn)生
傳播
9、反射,空氣10、3.10 三.選作作業(yè):(1)0(2)不變(3)A(4)320
2、B
暑假作業(yè)二 多彩的光
一.導(dǎo)學(xué)點撥
1、同種均勻介質(zhì)
3×108m/s
2、略
3、鏡面反射,漫反射
4、正,虛,相等,相等,垂直
5、光的反射
6、斜射,改變
7、紅-綠-藍
8、透過,反射,黑,白
9、凸透鏡,會聚,凹透鏡,發(fā)散
10、焦點,焦距
11、凸透鏡,2倍焦距,倒立,縮小
12、倒立,放大
13、凹透鏡,凸透鏡,平面鏡
14、凹透鏡,凸透鏡
15、倒立,縮小,實像 二.必做作業(yè)
1、C
2、A
3、C
4、C
5、B
6、B
7、月亮
8、折射,反射,折射,直線傳播 9~
12、略
13、同一高度,光屏上的像,a,b,c
暑假作業(yè)三 質(zhì)量和密度
一.導(dǎo)學(xué)點撥
1、物質(zhì)的多少 m
2、基本屬性
形狀 狀態(tài) 所處空間位置
3、kg g、mg等4、1500 350
5、kg g
6、天平
7、水平
游碼平衡螺母 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.必做作業(yè)
1、C
2、C
3、硫酸,酒精,水
4、(1)托盤天平,量筒,空燒杯,盛有鹽水的燒杯
3(2)A-D-C-B(3)ρ=(m1-m2)/V 5、179.4g,80,2.24×10,偏小
6、質(zhì)量 杠桿的平衡條件 391.60 中-后-前
37、空心,10cm,64g 三.選做作業(yè):用刻度尺測出OE的長度L,表達式:ρ油=ρ物(L0-L)/L0
暑假作業(yè)四 熟悉而陌生的力
一.導(dǎo)學(xué)點撥
1、一個物體對另一個物體的作用
2、大小,方向,作用點
3、相互的,形狀,運動狀態(tài)
4、彈簧測力計,彈性限度內(nèi)彈簧形變量與所受拉力成正比
5、零刻線,量程,N
6、G
7、質(zhì)量,G/m,地球上物體所受重力與質(zhì)量的比值
8、豎直向下
9、作用點
10、相反
11、壓力,粗糙 二.必做作業(yè)
1、C
2、D
3、C
4、B
5、C
6、相反,勻速直線,平衡力,1.6,1.6
7、(1)天平,彈簧測力計(2)物體所受重力的大小跟它的質(zhì)量成正比,其比值恒定,為9.8N/kg(3)武漢和上海,緯度差異,質(zhì)量
8、(1)同意,質(zhì)量增大為原來的幾倍重力也增大為原來的幾倍,(2)0-5;0.2; 2;(3)如圖所示;(4)正比;(5)不能.
暑假作業(yè)五 力與運動
一.導(dǎo)學(xué)點撥
1、外力、勻速直線運動、靜止、一切物體
2、實驗事實、推理、實驗
3、共同作用、合力、力的合成4、這兩個力的大小之和、方向
5、這兩個力的大小之差、較大的力
6、勻速直線運動、靜止?fàn)顟B(tài)、平衡、平衡、同一物體、同一直線、方向相反、大小相同 二.必做作業(yè)
1、形變、運動狀態(tài)的改變
2、相互的、慣性
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、旋轉(zhuǎn)一個角度、作用在同一物體上、避免卡片自身重力影響實驗
暑假作業(yè)六 壓強
一、導(dǎo)學(xué)點撥
1、垂直作用于物體表面上的力、垂直于物體表面
2、壓力、受力面積
3、壓力與受力面積上的比、p=F/S、帕斯卡(帕,Pa)
4、減小受力面積、增大壓力、增大受力面積、減小壓力 二.必做作業(yè)
1、受力面積
2、壓強
3、減小、增大4、6x104、2.5x105、變大5、2:
3、4:9
6、D
7、B
8、C
9、D
10、C
11、受力物體的形變程度、手里物體不同、等于、選擇容易形變的相同受力物體
12、受力面積一定,壓力越大,壓力作用效果越明顯、甲丙、沒有控制壓力一定13、600、0.02m2、3.2 x104 14、2 x104 N、2t
暑假作業(yè)七 液體壓強、大氣壓強與流體壓強
一、導(dǎo)學(xué)點撥
1.(1)各個方向、密度、增大
(2)同一深度各個方向的壓強相等
球?qū)嶒灐⑼欣锊鹄?/p>
3.1.013x105、760 4.小
2.馬德堡半二.必做作業(yè)
1.A 2.A 3.C 4.B 5.C 6.A 7.C 8.A 9.A 10.C 11.C 12.壓強、增大13.連通器、壓強減小 14.PA>PB>PC 15.低、大于 16、400
17、小、相平、深度、大、不變、相等 19.4.8N 2.5 x103
暑假作業(yè)八 浮力 一.導(dǎo)學(xué)點撥
1.豎直向上、浮力、豎直向上、氣、液
2.等于、重力、G排、m排g、****、液體密度、物體排開液體體積、深度
3.>、>、=、>、=、=、<、< 4.液體密度、浮沉條件、漂浮、等于、小、大、小
5.自身重力 二.必做作業(yè)
1.D 2.B 3.A 4.B 5.D 6.B 7.A 8.D 9.A 10.C
11、增大物體排開液體體積、2 12.>、= 13.變小、變大 14.10、上浮、6 15.1、下沉、密度 16.不變 17.<、<、=、<、<、< 18.80、下沉
319.(1)2400N(2)0.3m
暑假作業(yè)九 杠桿、滑輪
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,石頭前移或手后移
14、C
15、D
16、B
17、D 18、1000,500 暑假作業(yè)十 功和功率、機械效率
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)貨物的重力2000N;(2)叉車對貨物做功的功率400W.20、75%
暑假作業(yè)十一 機械能
1、動,勢,彈性勢,機械能
2、機械能,重力勢能
3、減小,減小
4、彈性勢能,動能
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)小球推動木塊移動的距離;(2)使小球從同一高度靜止滑下;
(3)結(jié)論是:質(zhì)量相同時,速度越大,動能越大;速度相同時,質(zhì)量越大,動能越大;
18、速度不同;根據(jù)機械能守恒,從近地點到遠地點衛(wèi)星的勢能增大,動能減小,所以速度減小
暑假作業(yè)12 小粒子與大宇宙
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、擴散;加快
16、分子在不停的做無規(guī)則運動
17、分子的運動,光的反射
18、(1)1(2)0.7,下(3)1000(4)分子引力
19、(1)猜想:溫度越高,分子運動越快
(2)實驗:取相同體積的冷水和熱水,分別滴入相同體積的墨水,觀察哪杯液體擴散更快。
暑假作業(yè)十三 溫度與溫度計、熔化與凝固
一、導(dǎo)學(xué)點撥
第一節(jié):1:固態(tài)液態(tài)氣態(tài),固體液體氣體,物態(tài)變化
2、(1)冷熱程度,t,攝氏度,℃(2)0℃,100℃(3)37℃,37攝氏度(4)﹣218℃(讀作:零下218攝氏度或者負(fù)218攝氏度),2500℃,6000℃
3、(1)熱脹冷縮(2)量程,分度值(3)浸沒,容器底,容器壁,穩(wěn)定,相平
4、略
第二節(jié):
1、(1)液,固,熔化(2)熔化,凝固(3)C
2、(1)晶體:金屬、冰、食鹽、石墨;非晶體:石蠟、塑料、玻璃(2)不變,熔點,升高,吸(3)有無固定熔點(4)略(5)凝固,熔化,溫度不變
二、必做作業(yè):
1、3,液泡沒浸沒,視線未水平
2、熔化吸熱,凝固放熱
3、C
4、A
5、D 6、80.5,80.5,晶體,固態(tài)、液態(tài)、熔化,4,吸,凝固,固液共存
暑假作業(yè)十四 汽化與液化、升華與凝華、全球變暖與水資源危機
一、導(dǎo)學(xué)點撥
第三節(jié):
1、液態(tài)、氣態(tài)、氣態(tài)、液態(tài),略(參見課本)
2、(1)做功,熱傳遞(2)表面,內(nèi)部,吸熱,不變,費電,100,78,越高
3、不是,蒸發(fā),任何,表面,溫度越高,質(zhì)量越大,表面空氣流速越快,吸熱,降低,略
4、略(參見課本)
第四節(jié):1(1)固態(tài),氣態(tài),氣態(tài),液態(tài),略(2)吸熱,放熱
2、升華,凝華,升華
3、熔化汽化升華,凝固液化,凝華
二、必做作業(yè)
1、汽化,液化、凝固,液化
2、汽化吸熱,水蒸氣液化放熱
3、C
4、ABC
5、C
6、溫度,99,不變;吸收,損失
7、升華,凝華,液化,熔化
暑假作業(yè)十五 物體的內(nèi)能
一、導(dǎo)學(xué)點撥
1、(1)分子,永不停息地做無規(guī)則運動,動能,引力,斥力,勢能(2)動能,勢能,焦耳,J(3)溫度,不為0
2、做功,熱傳遞(1)增加,機械能,內(nèi)能,減小,內(nèi)能,機械能(2)低溫,略(參見課本)
3、(1)內(nèi)能,J(2)熱量,降低,減小,熱量,升高,增加,轉(zhuǎn)移,能量
二、必做作業(yè)
1、所有分子,無規(guī)則,勢能,無規(guī)則,引力,斥力,內(nèi)能
2、內(nèi)能,內(nèi)能
3、增大,熱傳遞
4、內(nèi)能,升高,熱傳遞
5、熱量,溫度,內(nèi)能
6、C
7、C
8、D
9、D
暑假作業(yè)十六 物質(zhì)的比熱容
一、導(dǎo)學(xué)點撥
31、沒題
2、(1)熱量,比熱容,c,J/(kg·℃),焦每千克攝氏度,特性,4.2×10 J/(kg·℃),略(仿寫不可能不會吧?)(2)物質(zhì)種類、質(zhì)量、溫度變化量,比熱容,質(zhì)量,物體的初溫,物體的末溫,cm(t2-t1),cm(t1-t2)(3)水
3、冷卻發(fā)動機,取暖,保護秧苗防止凍傷,計算題略
二、必做作業(yè)
41~6:DBADCB 7、4.2×10,熱傳遞,小于
8、質(zhì)量,質(zhì)量相同的水和沒有,升高相同的7溫度,水吸收的熱量更多 9、3.7×10J 暑假作業(yè)十七 內(nèi)燃機 熱機效率
一、導(dǎo)學(xué)點撥
1.機械
內(nèi)燃 氣缸內(nèi)
吸氣 壓縮 做功
排氣
壓縮
做功 2.排氣
3.化學(xué) ;化學(xué);內(nèi)
4.噪音 ;廢氣
5.3.4×107
完全燃燒1Kg的木炭放出的熱量是3.4×107J
6.用來做有用功的 ;燃料完全燃燒 ;25%;1.65×107
二、必做作業(yè)
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.內(nèi); 機械; 內(nèi);16.壓縮; 做功;
17.內(nèi); 比熱容; 小;
18、(1)6.3 ×107 J
(2)2.04×108J
(3)31%
19、1.008×109 J 16 m3
暑假作業(yè)十八 電是什么
一.導(dǎo)學(xué)點撥
1、吸引輕小物體;摩擦起電;接觸帶電
2、(1)同種;異種 ;兩種(2)同種
3、絲綢 ;玻璃棒;毛皮;橡膠棒
4、排斥 ;吸引
5、同種電荷相互排斥
6、轉(zhuǎn)移
二、必做作業(yè)
1.C; 2.ABC; 3.B; 4.C 5.C 6.C 6.異; 摩擦起電;
7.同種; 摩擦起電; 電子;
8.正; 排斥;9.正; 負(fù); 負(fù);
10.吸附在塑料梳子上; 帶了電; 吸引輕小物體;11.負(fù); 正; 12.吸引輕小物體; 紅外線; 漫; 氣體流速大,壓強小;13.電; 力可以改變物體的運動狀態(tài); 大于;
14.正; 排斥;
15.同種電荷相互排斥
小球和豎直方向夾角與什么因素有關(guān)?
暑假作業(yè)十九 讓電燈發(fā)光
作業(yè)17內(nèi)燃機 熱機效率 答案 作業(yè)18 電是什么 作業(yè)19 讓電燈發(fā)光 一.導(dǎo)學(xué)點撥
1、電荷;定向;有電源 ;電路是通路;正;正極;負(fù)極 自由電子;相反
2、(1電能
其它形式
電
3、電源
開關(guān)
用電器
導(dǎo)線;正
負(fù)
;沒有;
電源
沒有
電源 ;電源
通
二、必做作業(yè)
1.B; 2.C; 3.C; 4.A; 5.A;
6、B
7、B
8、C
9、C
10、石墨能導(dǎo)電,使電源短路
11、相反
12、D
13、燈絲斷了
電池沒電了 開關(guān)開路……
暑假作業(yè)二十 連接串聯(lián)電路與并聯(lián)電路
一.導(dǎo)學(xué)點撥
2、逐個順次;正;一條;負(fù) 串
3、并列 ;多;能;整個;本條支路;互不
二.必做作業(yè)
1、正;定向;正;負(fù)
2、電源
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初二語文暑假作業(yè)答案
2015初二語文暑假作業(yè)答案
3.2010年4月,國家出臺了國策十條,要努力改善百姓居住條件。杜甫的《茅屋為秋風(fēng)所破歌》中的“______________________,_______________________!”就表現(xiàn)了這種美好愿望。(2分)4.下列句子沒有語病的一項是()(2分)A.在當(dāng)前的國際競爭中,我們所需要的,一是勇氣,二是智慧。
B.國家出臺嚴(yán)厲的“國八條”樓市調(diào) 控措施,是因為樓價問題突出的原因。
C.我們要善于運用材料、積累材料、整理材料,才能寫好作文。
D.長城連綿萬里,雄偉壯觀,是我國勞動人民智慧和汗水的結(jié)晶,是祖國的天然屏障。
5.下列標(biāo)點符號使用有錯誤的一項是()(2分)A.自聯(lián)軍空襲利比亞以來,已造成許多平民傷亡。人們不禁懷疑,是保護平民,還是另有所圖? B.我這個人到了陌生的地方就容易暈頭轉(zhuǎn)向,不知道哪是東,哪是西。
C.為了援助災(zāi)區(qū),人們連夜送去了棉衣、毛毯、藥品、食物、與大量建材。
D.雙匯集團被曝收購“瘦肉精”豬肉以來,其宣傳的“十八道檢驗,十八個放心”遭到質(zhì)疑。
6.將下段文字后的幾個句子填入文段空缺處,正確的排序是____________(2分)這是怎樣親近、怎樣金碧輝煌的明月啊!______________________我陶醉在這金色的夢中了,①她的金色的柔光滟滟地瀉在廣袤的大地上,遠近的房屋、樹梢、山影、水痕,全都泛出了淺金色的光芒。
②她又是那么圓,圓得似乎要凸出來、蹦出來了。
③她低低的掛在澄凈如洗的空中,離我那么近,仿佛一伸手便可以摘下。
④我狂喜地望著這神奇的月色,仿佛走進了金色的夢境,一切都閃閃爍爍、蓬蓬勃勃的。
⑤一陣微風(fēng)吹過,四野的金光便閃閃滾動起 來!
如果你是魚兒,那快樂就是一汪清涼清涼的水;如果你是小草,那快樂就是一束暖暖香香的陽光;如果你是_______________________,那快樂就是_______________________。
8.下列對課文內(nèi)容理解不正確的一項是()(2分)A.《敬畏自然》從總體上理性地思考人與自然的關(guān)系,提倡一種新的理念:敬畏自然,就是敬畏我們自己。B.散文《云南的歌會》描寫了三種不同場合聽到的民歌演唱,演唱方式和內(nèi)容都不相同,由衷地表達了作者的贊賞之情。
C.《小石潭記》中,柳宗元雖然在對小石潭自然風(fēng)景的描繪中,沒有融會自己的身世遭遇、思想感情,但是,在文章的議論部分卻寄喻自己的不幸遭遇,傾注怨憤抑郁的心情。
D.《岳陽樓記》超越了單純寫山水樓觀的狹小境界,將自然界的晦明變化、風(fēng)雨陰晴和“遷客騷人”的“覽物之情”結(jié)合起來寫,從而將全文的重心放到了政治理想方面,擴展了文章的境界。
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