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  3. By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para

By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para

游客2023-08-03  40
问题 By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para. 1), the author means that ______. [br] What has kept temperatures from rising at an even higher rate?
选项 A、The absorption of carbon dioxide by natural factors.
B、Human effort to reduce carbon dioxide emissions.
C、Drastically reduced emissions of greenhouse gases.
D、A 10% decrease in the average weight of polar bears.
答案 A
解析 信息归纳题。文章在结尾处提到：“幸亏海洋、植物和土壤吸收了大气中一半以上的二氧化碳——没有它们，世界的气温已经以惊人的速度剧增。”可见，各种自然因素对二氧化碳的吸收才使气温没有以更快的速度上升。
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