饮水加氟适用于龋病高发区和
A.水氟<O.3ppm,氟牙症指数<O.2 B.水氟<O.4ppm,氟牙症指数<0.3 C.水氟<0.2ppm,氟牙症指数<0.1 D.水氟<0.4ppm,氟牙症指数<0.2 E.水氟<0.3ppm,氟牙症指数<0.3正确答案D
饮水加氟适用于龋病高发区和
A.水氟<O.3ppm,氟牙症指数<O.2 B.水氟<O.4ppm,氟牙症指数<0.3 C.水氟<0.2ppm,氟牙症指数<0.1 D.水氟<0.4ppm,氟牙症指数<0.2 E.水氟<0.3ppm,氟牙症指数<0.3正确答案D