2. 外语
  3. If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger huma

If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger huma

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问题 If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger human health, causing a rise in the incidence of skin cancer and eye disease, and perhaps even threatening global ecological systems.
选项 A、and perhaps even threatening
B、and may even threaten
C、and even a possible threat to
D、as well as possibly threatening
E、as well as a possible threat to
答案B
解析 本句考核辨别并列结构的能力，即划线部分是与前面的哪一部分并列：是与前面的causing分词短词并列(如A、D)，是与谓语动词will endanger并列(如B)，还是与causing的宾语arise并列(如C、E)。假设A、D的并列方式是对的，则表明“危及人类健康(主句谓语)”这一动作会带来两个伴随结果：(1)导致皮肤癌及眼病的增加；(2)威胁全球生态环境。显然，第二个结果及主句这个行为是风马牛互不相及的事，句意上理解不通；采用类似办法，也可推断出第三种并列方式是错误的，从而第二种并列，即B选项正确，说明“紫外线的增加不仅会危及人类健康同时还会威胁全球的生态环境”。
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