(来学网)旋转阳极X线管阳极启动时间一般是
  • A.
    (来学网)0.5s
  • B.
    (来学网)0.8s
  • C.
    (来学网)1.0s
  • D.
    (来学网)0.4s
  • E.
    (来学网)0.3s