问题 选择题

下列说法中正确的是(  )

A.静电感应不是创造电荷,只是电荷从物体的一部分转移到另一部分

B.摩擦起电时,一个物体失去一些电子带正电,另一个物体得到这些电子带负电

C.两个带电体接触一定等分电荷量

D.一个带电体接触另一个不带电体,两个物体可能带上异种电荷

答案

AB

题目分析:

A、不管是哪种起电方式,本质是相同的,都是电荷的转移,A选项正确

B、当两种不同材料的物体互相摩擦时,一些束缚得不紧的电子往往从一个物体转移到另一个物体,于是原来电中性的物体由于得到电子而带负电,失去电子的物体则带正电.B选项正确

C、只有完全相同的两个带电体接触是才等分电荷量,C选项错误

D、一个带电物体去接触另一个不带电体时,电荷会转移到那个导体上,使物体带电,只能是同种电荷,D选项错误

故选AB

点评:容易题,大量事实证明,电荷既不能创造电不会消灭,只能从物体的一部分转移到另一部分,或者从一个物体转移到另一个物体,在转移的过程中,电荷的总量保持不变.

选择题
阅读理解

阅读理解

     Rodney Mace, 35, is married with two young children, and is a part-time teacher of history, "I am

 constantly surprised by other people's surprise, when they come to the house and see me cleaning a

floor or hanging out the washing. Their eyes open wide at the sight of it! Much of the comment comes

form men. But I am even more surprised at the number of women who comment too."

    His wife Jane, an Oxford graduate in modern languages, has a demanding full-time job. She is director

of the Cambridge House literacy scheme(扫盲计划) for adults in South London. Her working week

involves several evenings and Saturdays, and at these times her husband is in charge of home and family.

Apart from this, they share household jobs and employ a child-minder for the afternoons. This enables

him to teach two days a week and to do what he considers his principal work: writing. He has written

several books and spends much of his time in the Museum Reading Room, cycling there from his home

in Brixton.

    People ask the Maces if they think their children miss them. One can argue that satisfied parents

generally have satisfied children, but in any case the Maces are careful to spare time and energy to play

with their children. "And they have now developed relationships with other adults and children.

    Before, Rodney Mace worked full-time and Jane only part-time. Then 18 months ago, the director

of the literacy scheme left. "It seems to me that Jane was very well suited to do this job. She was very

doubtful about it. But I asked her to apply. She did, and she got it." Jane Mace says that she needed

this encouragement, as so many women do.

    Did his male ego(男性自我意识) suffer from the change-over? Nothing like that occurred. But he

still seems amazed at the way it changed his thinking. "I felt that we were finally going to be partners. I

felt enormous relief. I wasn't avoiding responsibility, but changing it. Our relationship is so much better

now. It has been a change for the good for both of us-think for all of us, in every aspect of our lives. I

cannot overemphasize(过高强调) that: in every aspect, I think it is necessary that the woman works.

    The idea of equal partnership is an illusion if one partner doesn't work.

1.The article is about a couple whose married life is happier because _______.

A. they have a truly equal partnership   

B. the husband enjoys staying at home

C. they earn more money                  

D. the wife has a full-time job

2.Jane finally decided to apply for her present job because ________.

A. she thought she had better qualification than others

B .her husband had persuaded her to 

C. it was very well paid

D .some of her friends encouraged her to

3. It is implied in the passage that ________.

A. the Maces believe a good career is even more important that their family life

B. Rodney's children are quite happy with their position in the family

C. even capable women sometimes need encouragement from their families

D. the practice of sharing household jobs between husband and wife is common in London

4.We can infer from this passage that a change-over of roles in the family ________.

A. is quite necessary in modern life

B. is probably based on some practical reasons

C. aims mainly at a complete liberation of women

D. shows women are not necessarily inferior(低下) to men

5.Which of the following statements is true?

A. Most Englishmen think that a husband should do more housework than a wife.

B. In London the traditional idea about the sex role at home has been completely changed.

C. Many Englishmen and Englishwomen still believe that women are mainly in charge of      

     home and family.

D. English people believe that men should take more responsibilities for house work.