咳大量脓性痰见于（）
A.支气管扩张
B.支原体肺炎
C.充血性心力衰竭
D.慢性支气管炎
E.细支气管肺泡癌
参考答案：A
—Nice to see you. I ________ you for a long time.
—I ________ in Beijing. I've just got back. [ ]
A. hadn't seen; was
B. haven't seen; shall be
C. haven't seen; was
D. didn't see; have been
保持喉气管通畅至关重要的是：（）
A.甲状软骨
B.环状软骨
C.会厌软骨
D.杓状软骨
E.舌骨
