管理员 辅导员 老师 学生分角色学生可以选课查看学分 老师可是审核学生选课，并且查看学生上课信息，辅导员可以查看学生信息，并且可以查看课程排名，管理员可以实现老师 辅导员 课程的增删改查(The administrator role counselor teacher students elective students view the teacher but the students credit audit, and view the class information, counselo