Which of the following is NOT mentioned as a reason for the global warming? The second paragraph is primarily concerned with___

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问题 Which of the following is NOT mentioned as a reason for the global warming?
The second paragraph is primarily concerned with______.

选项 A、the potential impacts of climate change for natural ecosystems
B、how to minimize the negative consequences of climate change
C、how to maximize the opportunities that climate change may offer
D、the complex, nonlinear nature of natural ecosystems

答案A

解析 第二段主要讲述气候变化对自然生态系统的潜在影响,包括短期性影响与长远性影响。
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