2. 外语
  3. Which of the following titles is most appropriate to the passage? The word "flip" (Pare. 2) most probably means______.

Which of the following titles is most appropriate to the passage? The word "flip" (Pare. 2) most probably means______.

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问题 Which of the following titles is most appropriate to the passage?
The word "flip" (Pare. 2) most probably means______.
选项 A、decline
B、intensify
C、fluctuate
D、reverse
答案D
解析 根据文章第二段：法国科学家的分析表明地球磁场强度的变化具有明显的节奏。尽管短期内磁场强度会发生不规则的变化，但每次两极转化之前似乎都不可避免地有一个长期的衰竭期。当两极转化时，地球磁场迅速地获得了能量并开始新一轮的循环。由此，根据上下文的意思可推断，poles flip就是指代前面的polarity reversal。flip指的就是两极的转化，由此可知，D项选择的意思与此项相符。
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