The oxygen equipment made it possible for climbers to rest very high altitudes._精华吧

The oxygen equipment made it possible for climbers to rest very high altitudes.

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The oxygen equipment made it possible for climbers to rest very high altitudes.

A.on

B.in

C.at

D.as

正确答案：at

Tag：科技英语语法时间：2024-01-08 09:42:42

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