為什么left的樣式一直不顯示
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type"content="text/html";charset="UTF-8"/>
<title>三列布局</title>
<style type="text/css">
? ? body{margin:0;padding:0}
? ? .left{width:33.33%；height:500px;float:left;background:blue}
? ? .middle{width:33.33%;height:500px;float:left;background:red}
? ? .right{width:33.33%;height:500px;float:right;background:#ccc}
</style>
</head>
<body>
</head>
<div class="left"></div>
<div class="middle"></div>
<div class="right"></div>
</body>
</html>
2018-07-11
left寬度后面封號用的中文