百日咳恢复期肺阴亏虚证的治疗首选方剂是( )
A．清金化痰汤B．苏子降气汤C．沙参麦冬汤D．知柏地黄丸E．桑白皮汤合葶苈大枣泻肺汤
参考答案：C
—Hey, boy! We should keep the park clean. You _________ throw litter about.
—Sorry, I won't do that again. [ ]
A. mustn't
B. needn't
C. couldn't
下列不适用于使用洋地黄类药物的情况，哪种除外（）
A.二度Ⅰ型房室传导阻滞
B.二度Ⅱ型房室传导阻滞
C.三度房室传导阻滞
D.病态窦房结综合征
E.快速心房颤动
