包括获得系统时间,几天后的时间以及查找目录的有效性和创建工具栏-including access to the system time, a few days after the search directory and the effectiveness and creation tools column
实现对学生资料的查询、删除、增加和修改,老师可以实现以上所有功能,而学生只能查询。-Information on the implementation of the students information, delete, and modify the increase, teachers can achieve all of the above functions, and students can only query.