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Becquerel's discovery of radioactivity, and thereby radiometric dating, not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep Earth's core so warm even billions of years after Earth's creation.
  • Anot only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep 分析该选项
  • Bnot only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also provided the mechanism of extra heat, which keeps 分析该选项
  • Cnot only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also to provide the mechanism of extra heat as well, keeping 分析该选项
  • Dnot only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat which would keep 分析该选项
  • Enot only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but provided the mechanism of extra heat as well, keeping 分析该选项
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正确答案: B

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