(来学网)表述致病菌的致病性强弱的毒力指标为
  • A.
    (来学网)LD90和ID90
  • B.
    (来学网)LD50和ID25
  • C.
    (来学网)LD50和ID90
  • D.
    (来学网)LD25和ID50
  • E.
    (来学网)LD50和ID50