2. 外语
  3. Magnetic field is an earth phenomenon that ______. Which of the following is the best title for the passage?

Magnetic field is an earth phenomenon that ______. Which of the following is the best title for the passage?

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问题 Magnetic field is an earth phenomenon that ______.
Which of the following is the best title for the passage?
选项 A、Polarity Reversal: A Fantastic Phenomenon of Nature.
B、Measurement of the Earth’s Magnetic-Field Intensity.
C、Formation of the Two Poles of the Earth.
D、A New Approach to the Study of Geophysics.
答案A
解析 本题问“下列哪项做文章的标题最合适?”一篇文章的标题应能概括文章大意或展现作者意图，本文的中心意思是发现地球两极的磁场有规律的变化。故[A]“磁极的更迭：一种有趣的响然观象”正确。[B]“对地球磁场强度的测量”。文中提到了对地球磁场的测量，但这并不是作者写此文的目的，也不能概括全文。[C]“地球两极的形成”。文中提到两极，但未涉及两极形成的过程。[D] “地球物理学研究的新方法”。文中侧重介绍两位法国学者的发现而不是其研究方法，不是文章的中心。
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