(来学网)40kVp时ⅹ线摄影用X线的最短波长约是
  • A.
    (来学网)0.03nm
  • B.
    (来学网)0.046nm
  • C.
    (来学网)0.06nm
  • D.
    (来学网)0.077nm
  • E.
    (来学网)0.09nm