(来学网)侧腭杆与龈缘的关系是
  • A.
    (来学网)与龈缘接触
  • B.
    (来学网)离开1~3mm
  • C.
    (来学网)离开4~6mm
  • D.
    (来学网)离开7~10mm
  • E.
    (来学网)离开11~15mm