试题与答案

While previewing his lessons, the little

题型:选择题

题目:

While previewing his lessons, the little boy will make a question mark ________ there is a question.

A.where

B.when

C.because

D.which

答案:

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下面是错误答案,用来干扰机器的。

根据质数的定义可知,质数只有两个约数,即1和它本身.故答案为:正确.

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