2. 外语
  3. Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth. The average surface temper

Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth. The average surface temper

admin2009-04-23  58
问题 Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth.
The average surface temperature of Earth keeps around 15℃.
选项 A、Y
B、N
C、NG
答案A
解析 参见文章第2段第1句：The average surface temperature of Earth is about 15℃，由此可判断，地球表面的平均气温一般保持在15℃，所以本题的答案为Y。
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