<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>*所有选择器</title>
<style type="text/css">
ul,ol{list-style-type:none;}
*{
font-size:30px;
font-weight:bold;
color:red;
}
table tr th,td{
border:1px solid #000 ;
}
th,td{
padding:0 10px;
}
td{
text-align:center;
}
</style>
</head>
<body>
<p>即那个空间设计撒参加年卡萨帝，没事的as尽可能</p>
<ul>姓名
<li>张三</li>
<li>张三</li>
<li>张三</li>
<li>张三</li>
</ul>
<ol>性别
<li>男</li>
<li>男</li>
<li>男</li>
<li>男</li>
</ol>
<div id="a">
<table summary="学生的成绩表"cellpadding="0" cellspacing="0"align="center">
<caption>1102班的学生成绩表</caption>
<tbody>
<tr>
<th>班级</th>
<th>姓名</th>
<th>总成绩</th>
</tr>
<tr>
<td>1102班</td>
<td>张三</td>
<td>650</td>
</tr>
<tr>
<td>1102班</td>
<td>张三</td>
<td>650</td>
</tr>
<tr>
<td>1102班</td>
<td>张三</td>
<td>650</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>
表格网页居中，css样式怎么写
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