易发生缺血性坏死的骨折（）
A.骨盆骨折
B.肱骨髁上骨折
C.股骨颈骨折
D.锁骨骨折
E.Colles骨折
参考答案：C
His first book _____ next month is based on a true story. [ ]
A. published
B. to be published
C. to publish
D. being published
为下面哪一条指令不能使进位标志CF置“0”？
A．AND AL，AL
B．MOV AL ，0
C．SUB AL ，AL
D．CLC
