<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>常用的通用属性</title>
<style type="text/css">
#div1{width: 100%;height: 708px;}
#div2{width: 100%;height: 10%}
#div3{background: #f8f8f8;width: 20%;height: 80%;float: left;}
#div4{background: #f0f0f0;width: 80%;height: 80%;float: left;}
#div5{width: 100%;height: 10%;clear: left;}
.class1{background: red;}
</style>
</head>
<body>
<div >hello word</p>
</body>
</html>
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