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4. (6 分) 分子式为 $\mathrm{C}_{5} \mathrm{H}_{12} \mathrm{O}$ 且可与金属钠反应放出氢气的有机物有（不考虑立 体异构）（）

Gaokao · Chemistry · previous-year question

  1. A.5 种
  2. B.6 种
  3. C.7 种
  4. D.8 种

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