The first paragraph of the text deals mainly with the earth atmosphere’s ______. According to the text, fossil studies of radio

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问题 The first paragraph of the text deals mainly with the earth atmosphere’s ______.
According to the text, fossil studies of radiolaria are significant because they ______.

选项 A、live in the depths of the ocean
B、are one-celled
C、have survived through the ages
D、demonstrate climatic changes prior to humans

答案D

解析信息推断题。第三段讲到放射虫的化石研究这个例子，目的是为了证明本段主题即第一句话：“气候变化过于复杂，不能只归因于人类活动”。它证明在人类出现之前已经有气候的变化了。

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大学英语四级

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