(来学网)我国饮用水卫生标准规定饮水中氟化物的含量不得超过
  • A.
    (来学网)0.5mg/L
  • B.
    (来学网)0.8mg/L
  • C.
    (来学网)1.0mg/L
  • D.
    (来学网)1.2mg/L
  • E.
    (来学网)20mg/L