为什么这样写也是实现了提出的任务的，可以这样写吗？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
.mainbox{
    width:960px;
    background-color:#CFF;
    float:left;
}
.leftBox{
    width:740px;
    background-color:#C9F;
    height:300px;
    float:left;
}
.rightBox{
    width:210px;
    height:300px;
    background-color:#FCF;
    float:right;
}
</style>
</head>

<body>
<div class="mainbox">
<div class="leftBox"></div>
<div class="rightBox"></div>
</div>
</body>
</html>

杨烊洋洋3379142

浏览 1787回答 8

8回答

慕莱坞8333017

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eq361

父DIV浮动，假如父DIV下面还有元素呢？父DIV浮动，是开启了BFC,阻止了父DIV高度塌陷。

一诺yinol

对的！

John_Skeet

w...what do u mean dude

随时随地看视频慕课网APP