—Your sister isn't a nurse. is she? 　　　

—________. She teaches English in a middle school. 　[ ]

A. No, she isn't 　　　　　　

B. Yes, she is 　　

C. Yes, she isn't　 　　　　

D. No, she is

气管异物的临床表现有：（）

A.咳嗽

B.颈部声门下拍击声

C.呼吸困难

D.哮鸣音

E.两侧肺呼吸音不一致