//贴上代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
.box1{
width:300px;
height:300px;
background-color: red;
}
.box2{
float:right;
width: 200px;
height:200px;
background-color: green;
}
.box3{
width:100px;
height:100px;
background-color: blue;
}
</style>
</head>
<body>
<div class="box1">
<div class="box2">
<div class="box3">
</div>
</div>
</div>
</body>
</html>
结果如图所示
/*由此得出结论，当给box2设置右浮动时，box2里面的box3盒子并不会继承浮动属性*/