(来学网)我国适宜的饮水氟浓度为
  • A.
    (来学网)0.5~1.0MG/L
  • B.
    (来学网)1.0~1.5MG/L
  • C.
    (来学网)0.7~1MG/L
  • D.
    (来学网)0.7~1.2MG/L
  • E.
    (来学网)0.5~0.9MG/L
正确答案:
C