(来学网)我国卫生部标准规定,对kV的精度要求为不超过
  • A.
    (来学网)±2%
  • B.
    (来学网)±3%
  • C.
    (来学网)±5%
  • D.
    (来学网)±7%
  • E.
    (来学网)±1%