(来学网)我国饮用水卫生标准中规定饮水中氟化物的含量不得超过
  • A.
    (来学网)1.5MG/L
  • B.
    (来学网)2.5MG/L
  • C.
    (来学网)0.5MG/L
  • D.
    (来学网)1.0MG/L
  • E.
    (来学网)2.0MG/L