成绩查询.如果你需要一个一成绩查询系统你可一下载这个，也可以用于登陆界面。这样你的工作量就会轻而易举的完成-in computer science is a multiuser, multitasking poerating system originally developed by ken thompson and dennis ritchie at bell for use on minicomputers ,its popilarity is due in large part to t