摘要：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.box1,.box2,.box3{width: 100px;height: 100px;background-color: red;float: left;}
.box2{background-color:royalblue;}
.box3{background-color:skyblue;}
.demo{border: 1px solid red;padding: 10px;clear: both;}
.box1{float: right}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="demo">这是浮动demo</div>
<!--
总结：浮动
float:left
float:right
清楚浮动
clear：both
overflow：hidden
-->
</body>
</html>
批改老师：天蓬老师批改时间：2019-01-24 08:52:44
老师总结：overflow：hidden, 这是非常推荐的方案, 特别是在BFC块中
