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The Earth is composed of many layers, and if the iron in its core is moved the Earth’s magnetic field is changed, sometimes more significantly before scientists can predict.

  • A

    the iron in its core is moved significantly the Earth’s magnetic field is changed, sometimes more significantly before

    分析该选项
  • B

    the iron in its core moves significantly it changes the Earth’s magnetic field, sometimes more significantly than

    分析该选项
  • C

    it moves the iron in its core it changes the Earth’s magnetic field, sometimes more significantly,

    分析该选项
  • D

    they move the iron in the core it changes the Earth’s magnetic field, because sometimes more significantly than

    分析该选项
  • E

    they move the iron in the core the Earth’s magnetic field is changed, sometimes more significantly,

    分析该选项
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正确答案: B

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