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问题 单项选择题 A1/A2型题

统计学上的系统误差、测量误差、抽样误差在实际工作中（）。

A.均不可避免

B.系统误差和测量误差不可避免

C.测量误差和抽样误差不可避免

D.系统误差和抽样误差不可避免

E.只有抽样误差不可避免

答案

参考答案：C

单项选择题

当机器开机之后，首先操作项目通常为（）。

A.输入刀具補正值

B.输入参数资料

C.机械原点复位

D.程式空车测试
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单项选择题

It has been argued by some that gifted children should be grouped in special classes. The (31) has been on the belief that in regular classes these children are held back in their intellectual (智力的) growth by learning situation that has designed for the (32) children.

There can be little doubt that (33) classes can help the gifted children to graduate earlier and take their place in life sooner. However, to take these (34) out of the regular classes may create serious problems.

I observed a number of intelligent children who were taken out of a special class and placed in a regular class. In the special class, they showed little ability to use their own judgment, relying (35) on their teachers’ directions. In the regular class, having no worry about keeping up, they began to reflect voluntarily on many problems, some of which were not on the school program.

Many are concerned that gifted children become (36) and lose interest in learning. However, this (37) is more often from parents and teachers than from students, and some of these (38) simply conclude that special classes should be set up for those who are (39) . Some top students do feel bored in class, but why they (40) so goes far beyond the work they have in school. Studies have shown that to be bored is to be anxious. The gifted child whop is bored is an anxious child.

31（）

A.principle 

B.theory 

C.argument 

D.classification
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