2. 外语
  3. A Soot’s Role in Changes in the Climate and the Atmosphere B Observations of Warming in the Northern Hemisphere C Explanation

A Soot’s Role in Changes in the Climate and the Atmosphere B Observations of Warming in the Northern Hemisphere C Explanation

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问题 A  Soot’s Role in Changes in the Climate and the Atmosphere
B  Observations of Warming in the Northern Hemisphere
C  Explanation of Increased Warming Effect Caused by Soot
D  Effort to Reduce Snow Albedo
E  Ways to Reduce Soot Emission
F  Greenhouse Gases as the Main Factor of Global Warming
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选项
答案F
解析 第六段的关键句子是：“...greenhouse gases are the primary cause of climate warming during the past century．”
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