与其放在电脑里占内存，还不如拿出来帮助一群小白白之html篇之六

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style type="text/css">
#aa
{
background:#03C;
text-align:center;
width:200px;
height:300px;
line-height:200px;
border-radius:50px;
}
</style>
</head>

<body>
<div id="aa">sahshj</div>
</body>
</html>