单项选择题
A.分为单纯型和喘息型B.白天较轻,晨起重C.痰多白色泡沫而难咳D.常在春夏季节发病
A.2~4minB.4~6minC.6~8minD.8min以上
A.麦氏点B.上腰部C.脐周D.右下腹