高等继续教育 / 专科英语II
正确率：100%
题型描述: 单选题
A bottle weighs more after air is put in. _ _ _ _ _ _ proves that air has weight.
A. Which
B. We
C. What
D. It
A bottle weighs more after air is put in. _ _ _ _ _ _ proves that air has weight.
A. Which
B. We
C. What
D. It
参考答案：
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