需求概述：

为了巩固所学知识，在一部分内容结束时会布置作业。因为学生数量太多，不可能每次每个同学的作业都检查。所以，采用每次作业随机抽查几名同学的方式。

数据处理：

学生数据的来源：教务处提供的选课名单。

选出学生数据的处理：

让被选中的同学知道：显示给所有同学看到

教师留存根以便检查作业：保存到一个文件中

安全使用问题：

选课名单和类文件都不能让同学接触-Requirements Overview: In order to consolidate the knowledge, in the end will be part of assignments. Because too many students, not every job is checked for each student. Therefore, the use of each job the way several students were randomly selected. Data processing: Student Data Source: Office of Academic Affairs to provide the course selection list. Selected data processing students: Let students know that the selected: visible to all students to see the retention of teachers in order to check the root operation: save to a file in the safe use of: Course List and do not allow students to access class files