气管肿瘤的常见症状有:()
A.呼吸困难
B.哮喘或咳嗽
C.反复发作的肺炎
D.咯血
E.声嘶
参考答案:A,B,C,D,E
Sun Yanzi is a singer, I like ______ very much. [ ]
A. she
B. her
C. hers
D. herself
行政决策是行政管理过程的首要环节。( )