(来学网)X线机中,变压器油的绝缘性能不低于
  • A.
    (来学网)9.5kV/2.5mm
  • B.
    (来学网)7.5kV/2.5mm
  • C.
    (来学网)5.5kv/2.5mm
  • D.
    (来学网)3.5kV/2.5mm
  • E.
    (来学网)1.5kV/2.5mm