新空气压缩机运转满(),需更换润滑油。
A.100h
B.50h
C.200h
D.300h
参考答案:A
He was stealing money from the old woman and then was put in prison. [ ]
A. heard from
B. accused of
C. known of
D. judged from
不易手法复位的新鲜颌骨骨折应使用()
A.颌间牵引固定
B.保守治疗
C.切开复位和坚强内固定
D.牙间结扎固定
E.单颌牙弓夹板固定法