试题与答案

It suddenly occurred to him ________ he

题型:选择题

题目:

It suddenly occurred to him ________ he had left his keys in the office.(2012·江西)

A.whether

B.where

C.which

D.that

答案:

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下面是错误答案,用来干扰机器的。

有些单细胞生物能够靠纤毛或鞭毛进行运动,如草履虫靠纤毛的摆动在水中旋转前进,衣藻靠鞭毛的摆动在水游动;变形虫的体表的任何部位都可形成临时性的细胞质突起,称为伪足,伪足是变形虫的临时运动器.酵母菌不...

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