(来学网)采集加氯消毒的医疗机构污水样500ml,应加入1.5%Na2S2O3溶液
  • A.
    (来学网)5.0ml
  • B.
    (来学网)4.0ml
  • C.
    (来学网)3.0ml
  • D.
    (来学网)2.0ml
  • E.
    (来学网)2.5ml