2. 外语
  3. Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth. Without greenhouse effect,

Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth. Without greenhouse effect,

admin2009-04-23  67
问题 Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth.
Without greenhouse effect, Earth would be colder by about ______.
选项
答案33 Celsius degrees
解析 参见第2个小标题THE GREENHOUSE EFFECT下第2段倒数第2句：All life on Earth relies on this greenhouse effect—without it, the planet would be colder by about 33 Celsius degrees。
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