2. 外语
  3. By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para. 1), the author means that ______. Which of th

By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para. 1), the author means that ______. Which of th

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问题 By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para. 1), the author means that ______.
Which of the following is listed as being evidence for global warming?
选项 A、Water shortages in cities.
B、Earlier thawing of lakes and rivers.
C、Increased levels of greenhouse gases.
D、The rapid extinction of the polar bear.
答案B
解析 事实细节题。第三段告诉我们，河流湖泊提的解冻属于全球变暖的迹象。
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大学英语四级

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