(来学网)非贵金属的金属树脂混合桥其基底冠的厚度应不小于
  • A.
    (来学网)0.1~0.2mm
  • B.
    (来学网)0.2~0.4mm
  • C.
    (来学网)0.5~1.0mm
  • D.
    (来学网)1.0~1.5mm
  • E.
    (来学网)1.5~2.5mm