为什么不能在同一排
<!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">
/*在此定义相应的类选择器，并根据要求设置相关CSS属性*/
.box{background:#cff;width:960px;height:300px;}
.main{height:300px;width:740px;background:#c9f;}
.look{height:300px;width:210px;background:#fcf;float:right;}
</style>
</head>
<body>
<!--在此添加相应的div标签-->
<div class="box">
<div class="main"></div>
<div class="look"></div>
</div>
</body>
</html
look块为啥在下面
