(来学网)便携式超声诊断仪的国内供电是
  • A.
    (来学网)220V,50Hz
  • B.
    (来学网)110V,50H
  • C.
    (来学网)220V,60Hz
  • D.
    (来学网)110V,60Hz
  • E.
    (来学网)360V,50H