支气管哮喘典型的临床症状是 （）
A.胸闷
B.胸痛
C.咯血
D.干咳
E.反复发作性伴有哮鸣音的呼气性呼吸困难
参考答案：E
He likes to sleep with the window ____ and the door _____ at night.[ ]
A. opened, closed
B. open, close
C. opened, close
D. open, closed
与人体抵御外邪关系最密切的是（）
A.皮肤
B.汗孔
C.头发
D.津液
E.卫气
