搜题请搜索小程序“爱下问搜题”
问题 单项选择题

井场设备基础是安装钻井设备的地方，目的是保证机器设备的稳固，保证设备在运转过程中（），减少机器设备的振动。

A.移动下沉

B.移动、不下沉

C.不移动、不下沉

D.高效率

答案

参考答案：C

单项选择题 B型题

在农药、食品、化妆品毒理学安全评价程序中，属第四阶段的试验是（）

A.急性毒性试验

B.致突变试验

C.亚慢性毒性试验

D.慢性毒性试验

E.人体激发斑贴试验
查看答案
问答题

　　For years, many Asian-Americans have been convinced that it’s harder for them to gain admission to the nation’s top colleges. Studies show that Asian-Americans meet these colleges’ admissions standards far out of proportion to their 6 percent representation in the U.S. population, and that they often need test scores hundreds of points higher than applicants from other ethnic groups to have an equal chance of admission. Critics say these numbers, along with the fact that some top colleges with race-blind admissions have double the Asian percentage of Ivy League schools, prove the existence of discrimination. 　　The way it works, the critics believe, is that Asian-Americans are evaluated not as individuals, but against the thousands of other ultra-achieving Asians who are stereotyped as boring academic robots. 　　Of course, not all Asian-Americans fit this stereotype. They are not always obedient hard workers who get top marks. Their economic status, ancestral countries and customs vary. But compared with American society in general, Asian-Americans have developed a much per emphasis on intense academic preparation as a path to a handful of the very best schools.

查看答案