(来学网)以下哪一种矫治力强度为重度力
  • A.
    (来学网)大于60g
  • B.
    (来学网)大于150g
  • C.
    (来学网)大于250g
  • D.
    (来学网)大于350g
  • E.
    (来学网)大于500g
正确答案:
D