问题 单项选择题

鉴于单代号网络图与双代号网络图所表达的计划内容是一致的,两者的区别仅在于表达方式不同。以下不属于在绘制单代号网络图时应遵守的规则的是()。

A.一条箭线加两端的节点只能表示唯一的一项工作

B.绘制网络图时,宜避免箭线交叉,当交叉不可避免时,可采用过桥法、断线法、指向法

C.网络图中严禁出现双向箭线或无箭头的连线

D.网络图中严禁出现没有箭尾节点的箭线或没有箭头节点的箭线

答案

参考答案:A

阅读理解

 The greatest recent social changes have been in the lives of women. During the twentieth century there has been a remarkable shortening of the time of a woman’s life spent in caring for children. 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 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 forty-five and can be expected to live another thirty-five years and is likely to take paid work until retirement(退休) at sixty. Even while she has the care of children, her work is lightened by modern living conditions.

  This important change in women’s life-pattern has only recently begun to have its full effect on women‘s economic position. Even a few years ago most girls left schools at the first chance, and most of them took a full-time job. However, when they married, they usually left work at once and never returned to it. Today the school-leaving age is sixteen, many girls stay at school after that age, and though women usually marry younger, more married women stay at least until shortly before their first child is born. Very many more afterwards return to full or part-time 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, and with the both husband and wife sharing more equally in providing the money, and running the home, according to the abilities and interests of each of them.

 小题1:According to the passage, around the year 1900 most women married ________.

  A. at about twenty-five B. in their early fifties

  C as soon as possible after they were fifteen

  D. at any age from fifteen to forty-five

 小题2: We are told that in a common family about 1900 _________.

A.many 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小题3:When she was over fifty, the late nineteenth-century mother _________.

A.would be healthy enough to take up paid jobs

B.was usually expected to die fairly soon

C.would expect to work until she died

D.was unlikely to find a job even if she wanted one小题4:According to the passage, the women of today usually _________.

A.marry instead of getting paid work

B.marry before they are twenty-five

C.have more children under fifteen

D.have too few children

单项选择题