岩石在载荷的作用下,改变自己的形状或体积,当载荷去掉后,又能恢复其原来的形状或体积,

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问题:

岩石在载荷的作用下,改变自己的形状或体积,当载荷去掉后,又能恢复其原来的形状或体积,这种变形称为()。

A.弹性变形

B.塑性变形

C.流变

D.脆性变性

考点:综掘机司机初级综掘机司机初级综掘机司机题库
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根据《水利工程建设项目招标投标管理规定》(水利部令第14号),水利工程建设项目招标包括( )等。

A.施工招标

B.勘察设计招标

C.监理招标

D.征地移民招标

E.重要设备材料采购招标

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简述孔明美言安抚关羽的故事。

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根据中国船舶报告系统船长指南,如果在船位报前2小时发送变更报,那么下一个船位报发送时间改为变更报后()。

A.4小时

B.6小时

C.12小时

D.24小时

题型:单项选择题

The United States has historically had higher rates of marriage than those of other industrialized countries. The current annual marriage (51) in the United States—about 9 new marriages for every 1,000 people—is (52) higher than it is in other industrialized countries. However, marriage is (53) as widespread as it was several decades ago. (54) of American adults who are married (55) from 72 percent in 1970 to 60 percent in 2002. This does not mean that large numbers of people will remain unmarried (56) their lives. Throughout the 20th century, about 90 percent of Americans married at some (57) in their lives. Experts (58) that about the same proportion of today’s young adults will eventually marry.

The timing of marriage has varied (59) over the past century. In 1995 the average age of women in the United States at the time of their first marriage was 25. The average age of men was about 27. Men and women in the United States marry for the first time at an average of five years later than people did in the 1950s. (60) , young adults of the 1950s married younger than did any previous generation in U. S. history.

51().

A.rate 

B.ratio 

C.percentage 

D.poll

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简述宫颈癌的临床表现。

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