这是一个web网络作业系统设计。 【1】.有教师端和学生端 【2】.教师可以 批改作业、发布作业（含上传功能）、 【3】.学生可以 查看作业、上传作业。-This is a web network operating system design. [1]. There are teachers and students. [2]. The teacher can correct the homework, publish the job (including upload f