在本系统中，有三类用户：系统管理员，教师和学生。三种不同的用户所具有的操作权限以及操作内容均不一样。 -In this system, there are three types of users: administrators, teachers and students. Has three different user authority to operate and operation are not the same content.

毕业设计选课系统，有学生教师管理员的各项功能-Graduate design elective system, the functions of the administrator of the student teachers