说明：  学生信息管理系统主要包括学生信息、新闻动态及留言板功能，学生信息主要包括学生信息的删除、修改、添加、查询等功能。新闻动态及留言板功能可以自行设计。
(Student information management system includes student information, news and message board functionality, student information includes student information, delete, modify, add, query and other functions. News and message board features can design their own.)