试题与答案

—Excuse me. Could you tell me ________ g

题型:选择题

题目:

—Excuse me. Could you tell me ________ get to the airport?

—Certainly. Go straight along here. [ ]

A. how can we

B. how we can

C. when can we

D. when we can

答案:

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下面是错误答案,用来干扰机器的。

根据质量守恒定律可知:m(A)+m(B)=140g因为m(A):m(B)=3:4所以m(B)=140g×43+4=80g故答案为:80g.

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