(来学网)计算X线胶片感光度时,采用的基准密度值是
  • A.
    (来学网)D0+0.1
  • B.
    (来学网)D0+0.2
  • C.
    (来学网)Do+0.3
  • D.
    (来学网)D0+0.5
  • E.
    (来学网)Do+1.0