(来学网)在乳腺摄影中,单次曝光腺体平均剂量不应超过
  • A.
    (来学网)3mGy
  • B.
    (来学网)4mGy
  • C.
    (来学网)5mGy
  • D.
    (来学网)6mGy
  • E.
    (来学网)7mGy