div{position:fixed;margin:auto;left:0; right:0; top:0; bottom:0;width:200px; height:150px;}
标签：span class blog margin log position text pre bsp
div{position:fixed;margin:auto;left:0; right:0; top:0; bottom:0;width:200px; height:150px;}
标签：span class blog margin log position text pre bsp
原文地址：https://www.cnblogs.com/hedianzhan/p/8459901.html
