牙槽突骨折牙弓夹板和正畸托槽应跨过骨折线至少多少个牙位()
A.1
B.2
C.3
D.4
E.5
参考答案:C
解析:必须跨过至少3个牙位方可固定牙槽突骨折。
重复使用的危险化学品包装物.容器在使用前,应当进行检查,并做出记录。
His wife is finding fault with him, which makes him very angry.
A.constantly
B.regularly
C.previously
D.instantly