出现方肩畸形的原因是（）
A.锁骨骨折
B.肩关节盂空虚
C.上臂明显肿胀
D.肱三头肌撕裂伤
E.肱骨外科颈骨折
参考答案：B
阐述航空危险品运输的操作原则。
I'm sorry to be late. Thank you for waiting.（）
A.Tell me the reason why you‘re late.
B.That‘s OK.
C.It really took up my much time.
D.It‘s a pleasure. I come here 10 minutes ago.
