(来学网)血清制品常用防腐剂是硫柳汞,其常用浓度为
  • A.
    (来学网)0.02%
  • B.
    (来学网)0.01%
  • C.
    (来学网)0.2%
  • D.
    (来学网)0.1%
  • E.
    (来学网)1%