(来学网)用氯消毒时,集中式给水管网末梢水应不低于
  • A.
    (来学网)0.1mg/L
  • B.
    (来学网)0.05mg/L
  • C.
    (来学网)0.03mg/L
  • D.
    (来学网)0.7mg/L
  • E.
    (来学网)0.5mg/L