(来学网)瓷全冠唇面预备的最小间隙为
  • A.
    (来学网)0.8~1.0mm
  • B.
    (来学网)1.2~1.5mm
  • C.
    (来学网)1.6~1.8mm
  • D.
    (来学网)1.9~2.2mm
  • E.
    (来学网)2.3~2.5mm