(来学网)应用鸡胚培养立克次体时,孵育鸡胚的孵卵箱的湿度应为
  • A.
    (来学网)20%~35%
  • B.
    (来学网)35%~45%
  • C.
    (来学网)45%~55%
  • D.
    (来学网)45%~60%
  • E.
    (来学网)65%~75%