css显示问题
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.main{}
.top{height:100px; background:#ccc}
.left{ width:200px; height:500px; background:blue; }
.right{ margin-left:210px;height:500px; background:#9C9;}
.foot{ height:50px; background:#F63 }
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="right">right</div>
<div class="left">left</div>
</div>
<div class="foot">foot</div>
</body>
</html>
为什么和图片显示的不一样
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