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Gaokao Chemistry Practice Question

化学与日常生活息息相关。下列说法错误的是

  1. A.使用含氟牙膏能预防龋齿
  2. B.小苏打的主要成分是 $\mathrm{Na}_{2} \mathrm{CO}_{3}$
  3. C.可用食醋除去水垢中的碳酸钙
  4. D.使用食品添加剂不应降低食品本身营养价值

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