程序主要功能是 1允许学生将作业上传至服务器，这次课未完成的作业上传至服务器，下次课时下载文件继续完成。 2教师可以在后台管理，对作业进行批改打分，并将结果能过系统反馈给学生。 3教师可以在网上布置作业，一学期成绩进行累加。 4允许学生教师将作业打包下载-Main function is a program allowing students to work uploaded to the server, this lesson has not completed work uploaded to the server, download the file to the completion of the next class. Two teachers in the background, management, operations in correcting scoring, and results can be off the system feedback to students. 3 teachers available online assignments, a semester to accumulate. 4 allows students to teachers will work package to download