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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Americans seem to be cooling toward global warming. Just 57 percent think there is solid evidence the world is getting warmer, down 20 points in just three years, a new poll says. And the share of peo...
A.
Collecting the evidence of climate change.
B.
Taking action to limit emissions which absorb heat.
C.
Recording the highest temperature in a year.
D.
Negotiating a new treaty for reducing the emissions.