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2010初二暑假作业答案

2010初二暑假作业答案
1. provide 2, alive 3, founded 4. container 5.produce 6. bored 7.wet 8. lay 9.explaination 10. move 11. skiing 12 culture 13.offer 14. fresh 15. distry 16. burned 17. mail 18. plastic 19. insect

  20. relax 21. encourage 22 speaker 23. foolish 24. froms 25. throught 26。Accept 27. sence 28.balance 29. book 30. polite 31. harmful 32. capital 33. pass 34.exist 35. abroad 36.communicate 37.warn 38. end 39. fierce 40. join 41. same 42. dead 43. when 44. describe 45. lying 46. book 47. bored 48. foolish 49. polite 50. suggestion 51. French 52. cycling 53.doing 54. breathing 55. unhealthy 56. natural 57.based 58. star 59. founded 60.roofs 61. one another 62. am keen on 63. unsafely 64. is from 65. provide 66.sight 67. describe 68. lay 69. reception 70.movement 71.explaination 72. connected 73. terriby 74. successful 75. lively 76. seems like 77.belong to 78.fire engines 79.Thank goodiness 80.showed up 81. At last 82.feel like 83. stone deaf 84. go off 85. in a way 86.-95.(略) 96. Why nto 97. How aout 98.lookout 99.is well-known for 100. one another 101. bought to her 102. was dead 103. enjoy themseles 104.Are belong to 105. At last got to 106. plan to do 107. offer to us 108.不会109.was based on 110. as fat as 111. reduce sound pollution make 112.What’a wrong with 113.That seems like 114. hear barking 115 What ia look like .

  选择题。DCAAAACCBD

  十.1.Can can 2. Can can 3. mustn’t 4.May may

  十一。DBAEC

  七年级英语暑假作业(二)

  一.11.studied 12. went 13. visit eat 14. flew goes 15. took 16. families 17. sheep 18. monkeys 19.glasses 20. sandwiches 21. a box of 22. a bag of 23. a jar of 24. a loaf of 25. a carton of 26. us 27.yourself 28. yours 29. our theirs 30. your hers 31. enjoy themselves 32. Are those they are 33. Whose this It mine 34. by himself 35。 the old one

  情景对话专练。1-10: DJCIFAHEGB 11-20 : FIKAECDBHJ 16-20 CADFB

  21-45(略)。   present

  since

  doctor

  pollution

  open

  DABAC BBADB

  has taught

  married

  swim

  came have been

  have lived was

  练习二

  changes

  seen

  in fact

  marry

  southern

  enjoyed ourselves

  won’t until

  have been married

  has kept

  different from

  AADBD ABB

  练习三

  possible

  service

  although

  attraction

  present

  have since

  How many

  When buy

  Have carried

  got → been

  didn’t → hasn’t

  sadly → sad

  but → /

  already → yet

  next to

  has been opened

  any more

  how to get

  It’s to read

  There are came

  but came

  have known

  are interested in

  练习四

  CBACD B

  not arrived yet

  How long been

  How long heard

  Has ever been

  Has changed yet

  I have lived here since I was born

  It’s happy to play Chinese chess with my classmates

  Though Tom was ill, he went to school

  Where’s Mary? She has gone to the cinema

  Have you ever been to Beijing? Yes. I have been there

  I used to play computer games, but now I’m not

  练习五

  a theme park

  fast-food

  wave to us

  get married

  during the summer holiday

  at a high speed

  feel exciting

  a whole day

  go touring

  wait for an hour

  stop taking photos

  have/has gone to Shanghai

  have/has been to Shanghai

  on the second day

  careful carefully

  helpful helpfully

  hopeful hopefully

  wonderful wonderfully

  noisy noisily

  healthy healthily

  lucky luckily

  shiny 不知道

  impolite

  impossible

  unkind

  unpleasant

  cheerless

  harmful

  different

  present

  although

  lovely

  present

  pleasant

  sure

  go back

  performer

  sail

  development

  closer

  education

  feeling

  discusser

  meaning

  练习六

  have seen saw

  were doing was helping do

  was watching knocking

  made stop to read

  Was dancing

  not to take

  were clapping were marching

  The souvenirs are so expensive that I can’t buy them

  He has enough money to travel around the world

  What were you doing when he arrived

  Daniel was swimming in the lake at noon yesterday

  unnecessary

  delightful

  as

  fat

  Italy

  happy

  meaning

  excited shouted

  练习七

  out

  morning

  called

  office

  surprised

  tickets

  back

  cinema

  themselves

  thieved

  CDCAC BACBA

  练习八

  has been away from Shanghai for two days

  couldn’t stop taking photos with them, because they looked very cute

  have been in Hong Kong for a week

  have been to Hong Kong twice

  has already gone to Hong Kong been away for two days

  is quite different from it in Beijing

  never forget this meaningful experience

  did you come back from Hong Kong arrived the day before yesterday,I have already been back for two days

  作文略

  练习九

  information

  change

  enjoy

  screen

  online

  start

  restart

  is designed by

  e-dog for

  wasn’t night

  has lived for

  important

  used

  to go

  sold

  more

  libraries

  made

  will replace

  pleasant

  to buy

  练习十

  ABBCD ADA

  funny

  printer

  designed

  looking

  written

  correctly

  educational knowledge

  passed

  at the same time

  come out

  send e-mails

  get scores

  order a package on the Internet

  different clouds

  play the role of

  have a dream

  many places of interest

  be sold out

  search for information

  a remote control

  word processing

  a ten-year-old boy

  play the role of

  fall asleep

  use widely

  double click on the icon of

  What do you usually used computer for

  The computers are designed for the students

  What do you want to buy I want to buy a personal computer

  She will help you if necessary

  练习十一

  was left

  is double clicked

  was produced

  is put

  keep

  BCDBA

  练习十二

  levels

  character

  uses

  village

  jump

  goal

  ask

  knowledge

  need

  designed

  written

  start

  has worked

  is caught

  are marked

  typing

  was broken

  was lost

  was made

  is used

  be clicked

  Party things: cake chocolate Coke iced tea orange juice biscuit sweet chip

  Stationary: pen ruler desk

  Electrical appliances: computer air-conditioner e-dictionary television radio

  暑假作业数学答案

  练习一

  BAABA B

  =-0.5 =0.5

  a-b -2 a^3-a^2b

  19:13

  60x^2 y^2

  Y=x - a分之3

  练习二

  DCCDA

  12

  3。068×10^7

  -3.48×10^-5

  2

  10

  3 7

  练习三

  X≥1且≠2

  (-1,2)

  Y=12+2x

  -2<x<-0.5

  三

  DCCCA

  练习四

  BBCCA A

  y=x+5

  -2

  4

  3

  练习五

  BDCBA

  反 正

  -5

  5

  -2<x<0 和 x>1

  y= -x分之1

  初二暑假作业答案

  练习六

  CCDAD

  BF=CF ∠B=∠C

  3

  120°

  8cm

  36°

  练习七

  ADCBB

  ∠ABC=∠DCB

  3 △DCF≌△BAE △CFO△≌EAO △CDO≌△ABO

  根号2

  90°

  AD 45°

  练习八

  CCCDB

  对角线相等

  对角线互相垂直

  对角线互相垂直且相等

  AD BC

  平行四边形

  AB=CD

  练习九

  CCABB

  互相垂直平分 互相垂直 相等

  正方 正方

  AF=FD

  练习十

  90° 18° 252°

  16 15.5

  略

  6 12 40

  20 20% 71~80

  CAACA

  练习十一

  2.83

  7

  2(x平均数) S^2

  4.4

  7 7 3 1.2 乙

  BBCDD

  练习十二

  ≠±1 2

  -x^5 y分之1

  (-1,6)

  Y=-x分之1

  x≥3且x≠-0.5

  >2 三

  m<3分之2

  95°

  10

  12

  3.16

  10

  67.5°

  DBDBD BCCCB

  练习十三

  x^2 -4分之x^2+4x+9

  2

  -5

  -7

  Y=6x-2

  二四 增大

  1<m<2

  有两个锐角互余的三角形是直角三角形 真

  8

  8

  圆心角

  6

  6

  AB=AC

  ACDAB BB

  练习十四

  2

  3.1×10^-4 4.56×10^4

  (-2分之3, 2分之5 )

  根号2

  -a分之2b

  X=2

  根号2

  107°

  ∠B=∠E

  30cm

  3

  CDDAB DDC

  练习十五

  >-2

  x+y分之x^2 +y^2

  85

  -6

  -3分之4 3分之5

  m<0.5

  减小

  3

  26cm

  40°

  ADBAC CCCDC

  练习十六

  ACCCB 1或1.5

  3分之5或 -1

  -1或2

  1 (-4)

  2x^2 +5x+2

  第一天

  一

  1.匀速直线 3m/s 2.1200 1200 竖直向上 1200 3. 小于 等于 大于 4. 0.98 0.98

  5.后 摩擦力 向前运动 惯性 6. (1)运动员跳远时要助跑一段距离 (2)汽车驾驶员要系安全带

  7.(1)速度 (2)摩擦力 速度不便一直运动下去 牛顿第一(惯性) 8. 70 在箱子下面装上滑轮

  9.(1)力的作用是相互的 (2)力可以改变物体的运动状态

  二

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

  三

  (1)物理现象:弹簧片被压顽 物理知识:力可以改变物体的形态

  (2)物理现象:被弹簧片打击后的木片飞出去 物理知识:力可以改变物体的运动状态

  第二天

  一

  1.静止 匀速运动 静止 匀速运动 2.惯性 原来的状态 力 3.右 4.大于 等于

  5.惯性 重力 阻力 运动状态 6.增大 不变 7. 5 水平向右 10 . 10 右 加速直线

  8. 磁性黑板的摩擦力 9. 0 10

  二

  1.D 2. D 3.C 4.C 5. B 6.C 7.A 8.B 9.D 10.B 11.C

  三

  1.略 2.(1)A,E,H C,F B,G (2) 前 (3)略

  3.光滑 相等 木块翻转 大小相等,方向相反,作用在同一直线

  第三天

  一

  1.维持物体运动 改变物体运动状态 2.49000牛 49000牛 3.重力 改变物体运动状态

  4.匀速直线运动 0 5. 20 20 减小 6.大于 784牛 7.相等 8.改变物体运动方向 9.摩擦

  重 非平衡力 10.右 惯性 静止 11.等于 小于 大于

  二

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

  三

  略

  四

  1.静止 转动 转动 二力平衡的条件 2.等于 弹簧测力计的示数等于物体的重力

  弹簧测力计的示数大于物体的重力 3.重力的方向总是竖直向下的 二力平衡的条件

  第四天

  一

  1.绕某一固定点转动 2.动力 阻力 支点 支点 距离 阻力作用线的距离

  3.静止 匀速转动 4.动力乘以动力臂等于阻力乘以阻力臂 F1Xf1=F2Xf2

  5.40 6. 36 竖直向上 4 竖直向下 7.1/3 3 1 8. 近 远

  二

  1.D 2.C 3.C

  三

  略

  四

  1.弹簧秤 平衡螺母 动力 动力臂 阻力 阻力臂 动力乘以动力臂等于阻力乘以阻力臂 能

  2.C 3. 0.392 大于 4. (1)B 调节平衡螺母是杠杆在水平位置平衡

  (2)动力乘以动力臂等于阻力乘以阻力臂

  5.(1)右 右 水平 测量力臂 (2)个数 位置 在水平位置平衡

  (3)动力乘以动力臂等于阻力乘以阻力臂 (4) 12厘米

  第五天

  一

  1.省力 大 2.等臂 3. 9.8 4. 6 5. 40牛

  6. 0.9 500 7. 省力 B 增大 8.竖直向上 15

  9. 0.45 0.75

  二

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

  三

  (1)竖直向上 4牛 (2)方向该为与OA夹30度斜向上

  四

  水平 力臂 左 左 (1) 15.2 (2)动力臂错误

  第六天

  一

  1.滑轮的轴 轴心 轴心 物体 2. 改变用力方向 省力 3.等于 4.直径

  半径 一半 5.改变用力方向 上 100牛 6. 3牛 7.不能 600牛

  8. 使用动滑轮可以省一半力 拉力的方向改变,拉力的大小也 改变

  二

  1. A 2. D 3. A 4. D 5. C

  三

  1. (1) 29.4牛 (2)4.9瓦 2. (1)10牛 40焦 20牛

  第七天

  一

  1. 作用在物体上的力 物体在力的方向上通过的距离 2. 1200 10 0

  3. 29400 49 4. 150 5. 0 500 6. 18000000 9000

  7. 1000 0 8. 0 0 9. 800000 80000 10 .40 1

  二

  1. A 2. B 3. A 4. D 5. B 6. D 7. D 8. A 9.B 10.D 11.D

  三

  1. 196000焦 2. 4000000焦 3. 65牛 65牛 4. 2.5米 5. 乙 甲

  第八天

  一

  1.物体在单位时间 做功快慢 瓦 2.1000 3.1500 0.2 4. 14400 960

  5. 50 0 5 6.8000 2000 7. 0 100 8. 2:3 2:3 9. 20 40 10 .120000 2000瓦

  二

  1. C 2. A 3.A 4. C 5. A 6. B 7. B 8. C 9. B 10.C 11.A

  三

  1.(1)500焦 (2)50克 2.(1)13500000焦 (2)45000瓦 3.(1)400焦 (2)20瓦

  第九天

  一

  1.运动而具有 质量 速度 质量 速度 2.被举高而具有 质量 高度 质量 高度

  3.发生弹性形变而具有 弹性形变 形变程度 形变程度 4.不变 变小 变小

  5.变大 不变 变小 6.相等 7.动能 势能 功 焦 8.重利势 动 摩擦 机械 内 9.弹性势 弹性势 动 重力势 10.动 重力势 重力势 动

  11. 14焦

  二

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

  三 www.qiake.net

  1.(1)甲与乙 (2)C 它对纸盒做功最多


  1-10CAIEGDFBJH 11-15 ADCFB 21-25 ECFBA 26-30 CAFED 31-40(略)

  七年级英语暑假作业(三)

  CCAACCADCABBCCB

  CCBBCBACD

  CDDAB

  ABDCA

  BABCA

  DDCCA

  EBDAC

  ECDBG

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