案卷分析
参考答案：
是一种常用的评价策略，其内容主要是按照一定标准收集起来的学生认知活动的成果。
Questions 19-22
A． He is applying to a university in England.
B． He is consulting a female professor.
C．He is studying in a British university.
D．He is helping the woman cook some food.
当前广域网采用的拓扑结构多数是______拓扑。
