这是一个学生选课系统，要求能显示选修课程信息课程编号 课程名称 课程性质 总学时 授课学时 实验或上机学时 学分 开课学期等内容-This is a student elective system, the information required to display elective courses Course Code Course Title Course experimental nature of the total hours of teaching hours or credits Semester hours on the machine, etc.