为什么会多出奇怪的符号？
在右上边是哪里出错了才会显示成这样？
//
<<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>网页测试</title>
<style type="text/css">
body{margin:0;padding:0;text-align: center;}
.left{width: 33.33%;height: 500px;float: left;background: red;}
.middle{width: 33.33%;height: 500px;float: left;background: blue;}
.right{width: 33.33%;height: 500px;float: left;background: green;}
</style>
</head>
<body>
<div class="left">左</div>
<div class="middle">中</div>
<div class="right">右</div>
</body>
</html>
//
