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2021年初三寒假作业答案【物理 历史 英语】

2021年初三寒假作业答案【物理 历史 英语】
2021年初三寒假作业答案【物理 历史 英语】

2021年初三寒假作业答案【物理历史英语】

【导语】寒假到,快乐悄悄挂在脸旁,欢心轻轻潜入心房,轻松时时绕满身旁,一句问候送上幸福锦囊,寒假,愿你欢乐开怀,惬意自在!与朋友一起分享快乐时光吧!xx搜集的《2021年初三寒假作业答案【物理历史英语】》,希望对同学们有帮助。

2021年初三寒假作业答案:物理答案

第三章

力、力与运动参考答案

一、选择题

1.C

2.B

3.A

4.D

5.C

6.B

7.D

8.C

9.C10.D11.B

12.ABC13.ACD14.ACD15.AD

二、非选择题

16.相互

17.增大压力、增大

18.4、6

19.作图略

20解:(1)G1=m1g=900kg×10N/kg=9×103N

(2)∵G=mg∴m2=G2/g=1.5×104N÷10N/kg=1.5×103kg=1.5t

第四章

密度与浮力参考答案

一、选择题

1.D

2.B

3.D

4.D

5.A

6.A

7.D

8.D

9.B10.A11.B

12.ABC13.ABC14.AD

二、非选择题

15.不变

16.20、竖直向上、上浮

17.小于、增大、上浮

18.2.7g/cm3、2.7g/cm3

第五章

压强参考答案

一、选择题

1.D

2.D

3.A

4.A

5.A

6.A

7.A

8.B

9ABD10ABC

二、非选择题

11.相等;不相等

12.减小压强,增大压强。

13.靠拢;小

14.(1)海绵(或物体)的形变程度

(2)受力面积一定时,压力越大,压力作用效果越明显;(3)丁(4)等于 15.解:(1)小华受到的重力G=m g=40kg×10N/kg=400N

(2)小华在单脚滑行时对冰面的压力F=G=400N

她单脚滑行时对冰面的压强

p=F/S=400N/1.5×10-3m2=2.67×105Pa

当小华双脚站立时,她对冰面的压强变小,因为压力不变,受力面积变大。 2021年初三寒假作业答案:历史答案

第一题1—5CBDCA6—10AACAD11—15AAADC16—19BDCA

P68,

第二题它是第二次资产阶级革命,维护了国家统一,废除了奴隶制度,使北方资产阶级掌握了全部政权,为美国的资本主义迅速发展开辟了道路。

第三题1.他有功也有过。功:颁布了法典,确立资本主义社会立法,发展了资本主义之商业,多次打败“反法同盟”,维护革命成果,扩大革命影响。过:建立了独裁帝国。

2.认同。其实质是因为主要帝国主义之间发展不平衡后起义希望重新瓜分世界,因此,一战后帝国主义之间的狗咬狗,为非正义战争。

第一题1—5AADAD6—9DACD

第二题1.它是列宁对社会建设的掠夺,其实也是大大提高劳动生产的积极性,促进国民经济的恢复,巩固工农联盟,稳定苏俄维权政权。

2.帝国主义之间经济政治发展不平衡。

3.成就:建立齐全的工业体系,实现粮食白给白赊,也在核工业与航天技术上取得显著的成绩。优势:地大人多,重视教育、教育,大力发展粮食生产。不足问题:人口膨胀,环境恶化,民族与宗教矛盾复杂,官僚体制僵化,基础落后。三

第一题

1—5DBCAB6—10BADDB11—15DDBDD16—20DCACC21—25AADCD26—31AABCDD

第二题1.有功也有过。功:修万里长城,“书同文,车同轨”过:修万里长城,焚书坑儒

2.内容:a.重新确定实事求是的马克思主义思想路线;

b.把党和国家的工作重点从阶级斗争转到经济建设上;

c.提出改革开放的总方针;

d.形成以邓小平为核心的第二代领导集体。

意义:它是建国以来党的历史的伟大转折点,冲破了‘左’的束缚,标志着我国进入了社会主义现代化建设的新时代。

3.飞机的发明;汽车装备生产的诞生。

2021年初三寒假作业答案:英语答案

P1

一、单项选择

1—5AADAB6---10BDABA11---15BCBCC16—20AAADC

二、完型填空

21—25CDBAB26---30CDDCC

三、阅读理解

31—35DCBAC36—40CBBAC41—45BCADC46—50BDCDA

四、补全单词

1.waste

2.himself

3.aloud

4.duty

5.pronounce

6.memorize

7.regards

8.mistakes

https://www.sodocs.net/doc/3c13354080.html,ed10.death11.patient12.realized13.dealth14.soldier15.airplane

五、用所给的动词适当形式填空

1.are having

2.haven’t skated

3.am flying

4.heard

5.was

6.to save

7.ran8.didn’t feel9.was sent10.was saved

P2

I.DBACBBAABDAABDACCBDA

II.ADCADCDBAA

III.CABCDBCCBAACABDCACDB

IV.1.license2.pierced3.instead4.opportunity5.achieve6.medical

7.correct8.concentrate9.downstairs10.importance

11.reply12.knowledgeable13.refuse14.successfully15.experienceV.1.to have2.saw3.Parking4.is5.doesn’t come

6.will put

7.have been

8.could catch

https://www.sodocs.net/doc/3c13354080.html,e10.mus tdrive

P3

1-5BBCAD6-10BCBDB11-15DCDCC16-20DACDC

21-25BCACD26-30CBBAA

31-35CABAC36-40BDAAD41-45CDDAC46-50CDDBD

IV.1.dropped2.belong3.catch4.Whatever5.reminds6.neighbor7.camera

8.dishonest9.suited10.increasing11.director12.escaped13oceans14.heart 15.suggest

V.1.were sitting2.was carrying3.was4.was smoking5.not to see

6.Following

7.pulled

8.to sit

9.smiled10.felt

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2020初二年级英语寒假作业答案练习一 一、ABCDD DBCDD BBCDD 二、AABCB AABBB 三、DDAAA CCDDD 四、 was doing is was doing to leave natural easily importance 五、grew into to make for the first time are in danger encourages us to help will catch the school bus at the beginning are good at take away 六、you will what is How long How can by plane 七、She started to eat bamboo shoots and leaves Less and less space Too much traffic how to make a home page weighed 35 kilograms 八、natural wetlands provides ideal comfortably 九、China 13 basketball film fruit 十.作文略。

练习二 二. 单项选择。(20分) 1-5 BDAAD 6-10 CDDAB 11-15 BBCAD 16-20 ABACC 二. 交际英语。(5分) 21-25 BCDEA 三. 完形填空。(10分) 26-30 C B A CA 31-35 C B D A D 四. 阅读理解。(每空2分,共30分)、 (A )36-40 BBBCC (B) 41-45 CABDB (C). 46-50 BCCDD 五. 词汇。 A) 51. government 52. disasters 53. importance 54. encourages 55. height 56. screamed 57. directions 58. arrival 59. covers 60. unnecessary B) 61. killing 62. foggy 63. trapped 64. alive 65. carelessly 66.tourists 67. endangered 68. playing 69. was mopping 70. to build C) 71. crashed into 72. in fear 73. provide for 74. at birth 75. calmed down 六. 任务型阅读。(5分)

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