a weather warning system is established to help people away from danger heat? human activities contribute to global

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问题 ______a weather warning system is established to help people away from danger heat?
______human activities contribute to global warming?

选项 A、
B、
C、
D、

答案A

解析 A.指出全球变暖的祸因是人类的极端行为。

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公共英语五级笔试

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