游离端缺失,缺牙区牙槽嵴丰满,但末端基牙状况不理想时,应选用()
A.三臂卡环
B.圈形卡环
C.联合卡环
D.RPI卡环
E.对半卡环
参考答案:D
I’d like Jane, Joan,to go to the farewell party on behalf of our class. [ ]
A.more than
B.less than
C.rather than
D.or rather
男,18岁,自幼有哮喘,每年春季发作,用沙丁胺醇可缓解。今在公园春游时突感胸闷气急。
除了考虑哮喘急性发作外,应主要鉴别的疾病是
A.急性支气管炎
B.自发性气胸
C.外源性变态反应肺泡炎
D.急性心功能不全
E.肺栓塞