对疑诊重症肌无力的病人临床可用下列检查来确诊,除外()
A.疲劳试验
B.MRI
C.腾喜龙试验
D.新斯的明试验
E.乙酰胆碱受体抗体滴定测定
参考答案:B
二尖瓣脱垂()。
A.Graham-Steel杂音
B.Austin-Flint杂音
C.胸骨左缘3~4肋间收缩期喷射性杂音
D.心尖区收缩中期喀喇音
E.胸骨左缘第2肋间Gibson杂音
Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is () . It determines how the various results are computed by the product and presents this information in the form of a () and associated scenarios. The second is () , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is () , which determines the actions performed by or to each class or subclass and presents this information in the form of ().
The first step is().
A.use-case modeling
B.class modeling
C.dynamic modeling
D.behavioral modeling