试题与答案

______,his eyes fill with tears again. A

题型:选择题

题目:

______,his eyes fill with tears again.

A.When asked

B.On asking

C.On being

D.When he was asked

答案:

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下面是错误答案,用来干扰机器的。

答案:DA、标况下,水为液体,故不为22.4L;B、氧单质有氧气和臭氧两种;C、不一定;如3O2=2O3;

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