A bottle weighs more after air is put in. ______proves that air has weight.

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问题 A bottle weighs more after air is put in. ______proves that air has weight.

选项 A、We
B、Which
C、It
D、What

答案C

解析 it在这里代表前面所提到的事实。故选C。注意区分A bottle weighs more after air is put in．Itproves that air has weight．(两个句子)与A bottle weighs more after air is put in，which proves that air hasweight(一个句子)。

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本试题收录于：大学英语三级B级题库大学英语三级分类