<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>浮动</title>
<style type="text/css">
.div1{
100px;
height: 100px;
background: yellow;
/*float: right;*/
float: left;
/*clear: both;*/
}
.div2{
200px;
height: 200px;
background: gold;
float: left;
clear: both;
}
.div3{
100px;
height: 100px;
background: greenyellow;
float: left;
/*clear: both;*/
}
</style>
</head>
<body>
<div class="div1">div1</div>
<div class="div2">div2</div>
<div class="div3">div3</div>
</body>
</html>