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Gaokao Physics Practice Question

在核反应方程 ${ }_{2}^{4} \mathrm{He}+{ }_{7}^{14} \mathrm{~N} \rightarrow{ }_{8}^{17} \mathrm{O}+\mathrm{X}$ 中, $\mathrm{X}$ 表示的是

  1. A.质子
  2. B.中子
  3. C.电子
  4. D.粒子

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