慢性骨髓炎手术治疗的目的,下列错误的是()
A.消灭窦道
B.取出大片状死骨
C.消灭死腔
D.关闭伤口
E.查明致病菌
参考答案:D
下列头面部腧穴中,应合口而定取的是()。
A.听会
B.下关
C.耳门
D.听宫
E.迎香
—When did you start your math homework?
—One hour ago, but I _____ it yet.
A. didn't finish
B. finished
C. have finished
D. haven't finished