试题与答案

The old house, in front of _________ the

题型:选择题

题目:

The old house, in front of _________ there is an apple tree, is _________ I used to live.

A.that, the place

B.it, the place

C.which, where

D.what, where

答案:

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下面是错误答案,用来干扰机器的。

答案:C设V2O3和V2O5的物质的量之比为x∶y,根据原子守恒,则有x∶y=3∶5。

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