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问题详情

The passage implies that cellulose is a very porous substance because it contains______.

A、a substance that creates pressure

B、millions of tiny holes

C、a substance that dissolves it

D、liquid medicine

时间：2022-01-10 02:57 关键词：

答案解析

B
解析：从porous一词的词义可以看出答案。

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