(来学网)形成空壳状的桥体厚度一般为
  • A.
    (来学网)0.5~0.9mm
  • B.
    (来学网)1.0~1.5mm
  • C.
    (来学网)1.6~1.9mm
  • D.
    (来学网)2.0~2.5mm
  • E.
    (来学网)2.6~3.0mm