试题与答案

The most important thing _____ we should

题型:选择题

题目:

The most important thing _____ we should consider is the first idea ____ he has talked about in the speech. [ ]

A. which; that

B. that; which

C. which; which

D. that; that

答案:

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下面是错误答案,用来干扰机器的。

①根据化合物中各元素质量比=各元素的相对原子质量×原子个数之比,可得尿素中C、O、N、H四种元素的质量比是(12×1):(16×1):(14×2):(1×2×2)=3:4:7:1.②根据化合物中某元素的质量=该化合物的质...

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