(来学网)基托磨光面牙龈龈缘线的宽度一般是
  • A.
    (来学网)0.2mm
  • B.
    (来学网)0.3mm
  • C.
    (来学网)0.5mm
  • D.
    (来学网)1.0mm
  • E.
    (来学网)以上均不是