请根据所学知识，简述下列现象的原因. （1）某同学有一段时间，每到傍晚的时候就看

在现实艺术实践中，艺术家具备独特的艺术个性的标志是（）。

目前国内常用的失语检查法为（）。

A.波士顿失语检查法

B.西方失语检查套表

C.汉语失语成套测验

D.韦氏智力量表

E.双语和多语失语检查

室性期前收缩次数为多少可以诊断为“频发性室性期前收缩”

A．3/min以上
B．5/min以上
C．8/min以上
D．10/min以上
E．15/min以上

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 (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) . and associated scenarios. The second is (73) , which determines the classes and their attributes; Then determine the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

A. use-case modeling B. class modeling
C. dynamic modeling D. behavioral modeling

自愈是指在网络发生故障（例如光纤断）时，无需人为干预，网络自动地在极短的时间内使业务自动从故障中恢复。ITU-T规定的保护倒换时间在（）以内。

A.10ms

B.20ms

C.50ms

D.100ms