题目内容：
对气候变化影响最大的气体是（）
A.甲烷
B.水汽
C.二氧化碳
D.氧化亚氮
参考答案：
选择题：对气候变化影响最大的气体是（）
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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