问题 不定项选择

如图,用线圈CD放入线圈AB内(线圈绕法如图),演示电磁感应现象,当电流计中的电流从上面的正接线柱流入时,电流计的指针右偏,当电流从下面的负接线柱流入时,电流计的指针左偏,下列看到的哪些现象是正确的[    ]

A.电键S闭合的瞬间,看到电流计的指针左偏

B.电键S由闭合再打开的瞬间,看到电流计的指针左偏

C.只要电路中的电流足够大,滑动变阻器无须移动,指针就会发生偏转

D.当滑动变阻器向左移动的过程中,电流计的指针左偏

答案

答案:A

单项选择题
阅读理解

阅读理解

      During the twentieth century there has been a great change in the lives of women. A woman marrying

at the end of the nineteenth century would probably have been in her middle twenties, and would be likely

to have seven or eight children, of whom four or five lived till they were five years old. By the time the

youngest was fifteen, the mother would have been in her early fifties and would expect to live a further

twenty years, during which chance and health made it unusual for her to get paid work. Today women

marry younger and have fewer children. Usually a woman's youngest child will be fifteen when she is

fortyfive and can be expected to live another thirtyfive years and is likely to take paid work until sixty.

     This important change in women's life has only recently begun to have its full effect on women's

economic position. Even a few years ago most girls left school and took a fulltime job. However, when

they married, they usually left work at once and never returned to it. Today the schoolleaving age is

sixteen, many girls stay at school after that age, and though women marry younger, more married women

stay at work at least until shortly before their first child is born. Very many more afterwards return to full

or parttime work. Such changes have led to a new relationship in marriage, with the husband accepting a

greater share of the duties and satisfactions of family life.

1.  We are told that in a family in about 1900 ________.

A.  a few children died before they were five

B.  seven or eight children lived to be more than five

C.  the youngest child would be fifteen

D.  four or five children died when they were five

2.  One reason why the woman of today may take a job is that she ________.

A.  is younger when her children are more enough to look after themselves

B.  does not like children herself

C.  needn't worry about food for her children

D.  can be free from family duties when she reaches sixty

3.  According to the passage, it is now quite usual for women to________.

A.  stay at home after leaving school  B.  marry men younger than themselves

C.  start working again later in life  D.  marry while still at school

4.  Many girls are more likely to ________.

A.  give up their jobs for good after they are married

B.  leave school as soon as they can

C.  marry so that they can get a job

D.  continue working until they are going to have a baby

5.  Now a husband probably ________.

A.  plays a greater part in looking after the children

B.  helps his wife by doing much of the housework

C.  feels dissatisfied with his part in the family

D.  takes a parttime job so that he can help in the home