Human beings have already made use of . can be used to turn salt water into fresh water.

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问题 Human beings have already made use of ______ .
______ can be used to turn salt water into fresh water.

选项 A、Nuclear power
B、Electric power
C、New kinds of power
D、Chemicals and minerals taken from the sea

答案A

解析本题题干问“什么能源可以把咸水变成淡水”。原文第3句话指出使用核能可以把咸水变成淡水。因此选项A. Nuclear power是正确答案。

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大学英语三级B级

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