(来学网)饮水加氟适用于龋病高发区和
  • A.
    (来学网)水氟<0.3PPM,氟牙症指数<0.2
  • B.
    (来学网)水氟<0.4PPM,氟牙症指数<0.3
  • C.
    (来学网)水氟<0.2PPM,氟牙症指数<0.1
  • D.
    (来学网)水氟<0.4PPM,氟牙症指数<0.2
  • E.
    (来学网)水氟<0.3PPM,氟牙症指数<0.3
正确答案:
D