0．25MPa(绝对压)相当于() ["A．水下15m处的压力","B．水下25m处的压力","C．水下35m处的压力","D．25kg／cm2的压力","E．1800mmH2O的压力"]
简述食管的三个生理性狭窄及其临床意义。
下列传染病的传染途径 ["流行性脑脊髓膜炎()流行性乙型脑炎()霍乱()A．飞沫传播","B．注射传播","C．虫媒传播","D．食物传播","E．水型传播"]
女，30岁，咳痰，咯血，结合图像，最可能的诊断是() ["A．肺部感染","B．支气管扩张并感染","C．支气管囊肿","D．间质性肺炎","E．肺结核"]
Laimer三角
简述气管、支气管的生理功能。
