What does the passage mainly discuss? What should a driver do when ascending?

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问题 What does the passage mainly discuss?
What should a driver do when ascending?

选项 A、Rise slowly.
B、Breathe faster.
C、Relax completely.
D、Breathe helium.

答案A

解析事实了解题。根据文章的最后一段的最后一句中的"a diver must ascend slowly"可知答案。

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考研英语一

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