2. 外语
  3. A、carbon dioxide tends to alleviate environmental haze, while sulfurous gases usually increase it B、carbon dioxide tends to incr

A、carbon dioxide tends to alleviate environmental haze, while sulfurous gases usually increase it B、carbon dioxide tends to incr

admin2009-05-19  61
问题
选项 A、carbon dioxide tends to alleviate environmental haze, while sulfurous gases usually increase it
B、carbon dioxide tends to increase temperatures by trapping sunlight, while sulfurous gases tend to decrease temperatures by blocking it
C、carbon dioxide tends to have an effect on the environment, while sulfurous gases for the most part do not
D、sulfurous gases have played an even more significant role than carbon dioxide in pushing environmental temperatures outside the habitable range
E、sulfurous gases tend to decrease the level of solar radiation outside the earth’s atmosphere, while carbon dioxide plays only a negligible role
答案B
解析
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