支气管哮喘典型的临床症状是
A.反复发作性伴有哮鸣音的呼气性呼吸困难
B.胸闷
C.干咳
D.胸痛
E.咯血
参考答案:A
Jeff can't come to the party, because he'll _______ help his mom. [ ]
A. must
B. has to
C. have to
D. need to
公共管理伦理与责任控制机制包括()
A.立法控制
B.思想控制
C.社会控制
D.行政控制
E.司法控制