2013年6月13日神舟十号与天官一号完成自动交会对接。可认为天宫一号绕地球做匀

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问题:

2013年6月13日神舟十号与天官一号完成自动交会对接。可认为天宫一号绕地球做匀速圆周运动,对接轨道所处的空间存在极其稀薄的空气,则下面说法正确的是(   )

A.如不加干预,天宫一号的轨道高度将缓慢升高

B.如不加干预,在运行一段时间后,天宫一号的动能可能会增加

C.为实现对接,两者运行速度的大小都应介于第一宇宙速度和第二宇宙速度之间

D.航天员在天宫一号中处于失重状态,说明航天员不受地球引力作用

考点:万有引力定律
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英国媒体05年4月15日报道,高露洁牙膏中含有的消毒剂三氯生,遇含氯自来水能生成哥罗芳(三氯甲烷),哥罗芳能导致肝病甚至导致癌症。已知三氯生的结构简式如下:有关说法不正确的是 (       )

A.三氯生的分子式为:C12H7Cl3O2

B.哥罗芳不存在同分异构体

C.三氯生能与氢氧化钠溶液反应

D.三氯生易溶于水

题型:选择题

关于“十一五”时期教育发展重点工程,不正确的是( )。

A.西部地区农村寄宿制学校建设

B.农村中小学现代远程教育

C.西部农村初中改造

D.高等教育“211”和“985”工程

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Tales From Animal Hospital

David Grant

David Grant has become a familiar face to millions of fans of Animal Hospital . Here Dr Grant tells us the very best of his personal stories about the animals he has treated ,including familiar patients such as the dogs Snowy and Duchess , the delightful cat Marigold Serendipity Diamond . He also takes the reader behind the scenes at Harmsworth Memorial Animal Hospital as he describes his day , from ordinary medical check-ups to surgery (外科手术). Tales From Animal Hospital will delight all fans of the program and anyone who has a lively interest in their pet ,whether it be cat , dog or snake I ! $ 14.99 Hardback 272 pp Simon Schuster

ISBN 0751304417

Isaac Newton : The Last Sorcerer

Michael White

Form the author of Stephen Hawking : A Life in Science , comes this colorful description of the life of the world’s first modern scientist . Interesting yet based on fact , Michael White’s learned yet readable new book offers a true picture of Newton completely different from what people commonly know about him . Newton is shown as a gifted scientist with very human weaknesses who stood at the point in history where magic (魔术)ended and science began.

£8.99 Hardback 320 pp Fourth Estate

ISBN 1857024168

Fermat’s Last Theorem

Simon Singh

In 1963 a schoolboy called Andrew Wiles reading in his school library came across the world’s greatest mathematical problem : Fermat’s Last Theorem (定理). First put forward by the French mathematician Pierre de Fermat in the seventeenth century, the theorem had baffled and beaten the finest mathematical minds , including a French woman scientist who made a major advance in working out the problem , and who had to dress like a man in order to be able to study at the Ecole  Polytechnique . Through unbelievable determination Andrew Wiles finally worked out the problem in 1995 . An unusual story of human effort over three centuries , Fermat’s Last Theorem will delight specialists and general readers alike .

£12.99 Hardback 384 pp Fourth Estate

ISBN 1857025210

小题1:What is Animal Hospital ?

A.A news story .

B.A popular book .

C.A research report .

D.A TV program .小题2:In Michael White’s book , Newton is described as        .

A.a person who did not look the same as in many pictures

B.a person who lived a colorful and meaningful life

C.a great but not perfect man

D.an old-time magician小题3:Which of the following best explains the meaning of the word “baffle” as it is used in the text ?

A.To encourage people to raise questions .

B.To cause difficulty in understanding .

C.to provide a person with an explanation .

D.To limit people’s imagination .小题4:What is the purpose of writing these three texts ?

A.To make the books easier to read

B.To show the importance of science

C.To introduce new authors

D.To sell the books .

题型:选择题

一人用力踢质量为 0.1kg 的静止皮球,使球以 20m/s 的速度飞出.假定人踢球瞬间对球平均作用力是 200N ,球在水平方向运动了20m 停止 . 那么人对球所做的功为

A.5 J

B.20 J

C.50 J

D.400 J

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