Which of the following is the best title for the passage? What can be inferred from the passage?

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问题 Which of the following is the best title for the passage?
What can be inferred from the passage?

选项 A、The climate of earth has fluctuated quite a bit over the last 4.6 billion years.
B、An increase in the earth’s temperature will have major consequences for all life on this planet.
C、The information we have got makes us unable to explain the global warming completely.
D、The Pleistocene began about t. 8 million years ago.

答案C

解析 判断推理题。文章最后一段告诉我们地球的这段简短历史和气候记载,不足以使我们了解地球升温的含义,由此可推出答案C。
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