实例代码：
<!DOCTYPE html>
<html>
<head>
<style>
#header {
background-color:black;
color:white;
text-align:center;
padding:5px;
}
#aside {
line-height:30px;
background-color:#eeeeee;
height:300px;
width:100px;
float:left;
padding:5px;
}
#section {
width:350px;
float:left;
padding:10px;
}
#footer {
background-color:black;
color:white;
clear:both;
text-align:center;
padding:5px;
}
</style>
</head>
<body>
<div id="header">
<h1>City Gallery</h1>
</div>
<div id="aside">
London<br>
Paris<br>
Tokyo<br>
</div>
<div id="section">
<h2>London</h2>
<p>
London is the capital city of England.
</p>
<p>
Standing on the River Thames.
</p>
</div>
<div id="footer">
Copyright ? W3Schools.com
</div>
</body>
</html>
html布局就是这么来的。 | 
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