Liquid water only exists The total quantity of water on Earth

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问题 Liquid water only exists______
The total quantity of water on Earth______

选项 A、remains almost unchanged.
B、has greatly increased in recent years.
C、is decreasing constantly.
D、is affected by global warming.

答案A

解析根据短文第二段第一句的内容可以得知该题答案。

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职称英语理工类C级

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