初二愉快的暑假答案 数学英语物理.docx

1、初二愉快的暑假答案 数学英语物理数学一、一元一次不等式与反比例函数一、选择题BDDBD CACCD AC二、填空题1. -62. x=1/33. 0,1,24. 15. 246. 四7. a=58. 3/2二、分式与概率一、选择题DABDD BCCCB二、填空题1. -82. -13. 2/54. 0.35. 86. 3/57. x=1且x08. x=69. 1/610. 3000/1.25x - 3000/x = 20三、图形的相似与证明一、选择题DCDBA ABCB二、填空题1. 7/22. 2=C3. (1,4)(3,4)(3,1)4. 45. 如果两个图形是正方形，那么这两个图形是相似

2、形如果两个图形是相似形，那么这两个图形是正方形 假6. 40m 1/2BC 2ED7. 1.58. 12/7或16/7 貌似没有应用题啊。我找到了补发物理一、 填空题1.（1）2500 （2）5*10的-3次方 （3）15 15*10的-6次方2. 1*10的3次方 每1m3的水质量为1*103kg 不变3. 低4. 小 大5. 运动状态 相互 压强 熔化6. 0.45 0.9*103 0.057. 保持车距 系安全带8. 8 竖直向上9. 瓶塞的面积小于瓶底的面积 倒放的受力面积小于正立的受力面积10.将游码移到左端0刻度线 调节平衡螺母 11.减小受力面积 增大压强 增大受力面积 减小压强

3、12.形状 状态13.夸克 质子 原子核 原子14.c a15.作用点16.小 增大压力17.小于 变大 变大 大于18.正立的虚 大于 力的作用是相互的 200019.物体静止或匀速直线运动时，受到的力是平衡力物体做变速运动时，受到的力是非平衡力20.相等 大于 小于（如果不计气球重力就是等于） 物体具有惯性 物体受到的重力大于浮力21.100N 减小22.永不停息的运动之中 原子核 电子 排斥力23.小卡片 远小于 大小 方向 同一直线24.2.2 200 0.4*10325.刹车或减速 惯性26.2 减速 327.二、 选择题28-30 DBC31-35 CBCBC36-40 DCBCC

4、41-45 BABCA46-50 BAAAD51-55 DCBAB三、 解答题56-58 画图略59.雨伞上方的空气流速大，压强小，下方的空气流速小，压强大60.左 质量与体积的比值（最好不要写密度） 30 0.961.手在纸和桌面上滑动，在纸上感到的阻力比在桌子上大滑动摩擦力的大小与接触面粗糙程度有关，接触面越粗糙，滑动摩擦力越大在桌子上推动尺子，尺子会向前滑动一段距离后停止物体具有惯性62.接触面粗糙程度相同时，压力越大，滑动摩擦力越大压力 压力相同时，接触面越粗糙，滑动摩擦力越大2.2 大于 小于63.压力作用效果与受力面积的关系可以清楚地反映压力的作用效果没有 有2个变量64.乙 乙的

5、压强计页面高度差大于甲 同种液体，深度越大，压强越大不能 深度与密度都不同65.66.重力 读出弹簧测力计的示数 测出空桶的重力B错误，在溢水杯中加水，直至液面与杯口相平68.69.观察与思考（1）不能，瓶内的压强大于空气的压强（2）能（3）气球缩小，气漏出来 瓶内的压强大于气球内气体的压强做一做，想一想萝卜中气体的压强小于外界大气压强英语 Exercise 1一、A：1.surprised 2.luckiest 3.unkind 4.pollution 5.wivesB:1.sadly 2.just 3.married 4.railway station二、1.Have seen put t

6、o give2.lost Have seen saw3.Have found looked4.have returned will return5.Have written have wrote6.Have finished will do7.Have cleaned cleaned8.Have spoken9.Have borrowed borrowed10.have found did find三、1.Have heard from2.from time to time3.will take off4.have been in service5.has turned into四、1.has

7、nt been yet2.Have learned3.How long has lived4.have they5.How many times6.How long has worked7.stayed till8.since9.have been for10.because of五、1.has changed a lot2.has changed into a beautiful park3.less noise pollution than4.used to live are used to living5.have been away from6.has worked7.has taug

8、ht since8.have lost my pen have you seen it六、BADBD 七、CBEDA八、(A)trip places over hurry interesting so poor believe(B)1.cling film 2.trip selves in the fridge 3.special areas 4.lower shelver 5.regulary英语 Exercise 2一、1.handsome 2.popular 3.generous 4.admire 5.delicious二、1. was playing 2.is useless3.Wha

9、t were doing4.can do5.so beautiful that6.have married三、1.to have for dinner2.air ticket3.searches4.show to5.clap your hands6.seems7.tour8.so that9.theme park10.arrives in四、CDBBAABCDB五、BBDBCABADA六、A：1.Main Street U.S.A.2.Fantasyland3.Adventure Land4.Tomorrow Land5.Hong Kong DisneylandB:BCCAC英语 Exerci

10、se 3一、1.television2.programs3.marked4.role5.knowledge6.channel7.tourist8.widely9.simple10.control二、1.is spoken2.was built3.was caught4.is grown5.was made6.were planted三、1.cleans2.were printed3.doing4.to search5.interesting四、1.sets of2.did come out3.were searching for4.is used for5.find out五、1.get mu

11、ch knowledge from this game2.was put out quickly3.you have visited are marked in red4.for us to learn English5.When learn to make new friends六、CCDAADBAAC七、1.appeared2.blindness3.invention4.longest5.instead八、FTFFT英语 Exercise 4一、1.charity2.raise3.noise4.support5.hung6.volunteer7.decide8.speech二、DBCBDB

12、三、1.to learn reading and writing2.success performances3.organization to build4.following5.donations四、1.to discuss to2.will be held3.has been arranged well4.will be set up will be designed5.has been invited to join6.how to Why not free time五、EADGB六、BADAC七、1.send2.pretty3.fit4.studies5.take6.learn7.sp

13、orts8.playing9.but10.special英语 Exercise 5一、1.affects2.treatment3.patient4.skills5.teaching6.operations7.grateful8.cure9.afford10.treatment二、1.international2.operating3.medical4.gratefulpany6.blindness7.educate8.operate9.improve10.affect三、1.used to walk2.am used to reading3.be used to4.is used to tak

14、ing5.used to operate四、1.so fast that to keep learning2.such a meaningful work3.so cold that4.Operating on5.such a long time that6.so exciting that7.used to spend a lot of money buying8.make a better world五、BACDBBABAC六、（A）FTFFTT（B）1.young2.take3.old4.some5.clever6.walk7.slowly8.with七、（原题？）1.top2.arou

15、nd3.higher4.seeing5.foreign6.different7.reach8.there9.enjoy10.fun英语 Exercise 6一、1.kilometers2.everything3.bookseller4.lifestyle5.pencil-box6.countryside7.underground8.policewoman9.goldfish10.north-east11.hometown12.schoolbag二、1.spends playing2.at the age of five3.seen to read4.how to solve三、1.took p

16、lace2.is necessary to3.It hard to4.dont hurry up5.died ago四、1.Will go2.wont come3.will be4.yours5.himself6.asleep7.useful8.dressed9.harder10.saying五、1.pay attention to if I join the charity walk2.Please take the computer its necessary3.to drink a lot of water during the walk4.wise a map and a mobile

17、 phone5.Is there anything else to tell me6.bring enough food and water7.pleasant to help8.Its important to9.in Western part of China10.Its necessary for us to六、1.plan2.raise3.ask4.before5.host6.could7.any8.anything9.success10.so七、CBADCBCCBD 八、1.There are too many cars, and most of them has only one

18、person.2.They are so old and slow.3.The drivers never know where they are going.4.They are too crowded and dangerous.5.Write to the city government.九、1.The things there are cheap.2.The hamburgers there are delicious.3.I dont know.（这个文章里还真没有）4.It has big screens and comfortable seats.5.The tickets are cheaper.