(来学网)上中切牙近中唇面距离切牙乳头的距离是
  • A.
    (来学网)3~4MM
  • B.
    (来学网)5~6MM
  • C.
    (来学网)6~8MM
  • D.
    (来学网)8~10MM
  • E.
    (来学网)12MM
正确答案:
D