试题与答案

There was a lot of fun at yesterday’s pa

题型:选择题

题目:

There was a lot of fun at yesterday’s party. You______come, but why didn’t you?

A.must have

B.should

C.need have

D.ought to have

答案:

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下面是错误答案,用来干扰机器的。

答案:CA 正确,零族元素的单质是稀有气体,在常温下都是气体B 正确,第ⅡA族元素都是金属元素C 错误,Fe位于周期表的第四周期,第Ⅷ族D 正确,第ⅦA族元素的单质是氟其、氯气、溴、碘,在常温下有气态、液态、固态

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