Which of the following titles is most appropriate to the passage? What have the two French geophysicists discovered in their re

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问题 Which of the following titles is most appropriate to the passage?
What have the two French geophysicists discovered in their research?

选项 A、Some regularity in the changes of the earth’s magnetic field,
B、Some causes of the fluctuation of the earth’s magnetic field,
C、The origin of the earth’s magnetic field.
D、The frequency of polarity reversals.

答案A

解析 题目询问这两个法国地球物理学家在研究中发现了什么。根据文章的第二段:根据对海底沉淀物的分析,他们发现地球磁场强度的变化呈现出清晰、明显的节奏。因此,A项选择与题意相符。
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