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 the growth of　the for which initially