table 的设置
<!DOCTYPE html>
<html>
<head>
<title>表格（table）</title>
<link rel="shortcut icon" type="image/x-icon" href="">
<link rel="stylesheet" type="text/css" href="">
<style type="text/css">
*{margin: 0px;padding: 0px;}
table{border:1px solid #ccc;border-collapse: collapse;}
tr td{border:1px solid #ccc;border:1px solid #ccc;width: 100px;}
tr th{border:1px solid #ccc;border:1px solid #ccc;width: 100px;}
</style>
</head>
<body>
<table>
<tr>
<th>1</th>
<th>2</th>
<th>3</th>
<th>4</th>
<th>5</th>
</tr>
<tr>
<td colspan="5"> 合并列 </td>
</tr>
<tr>
<td rowspan="2"> 合并行1 </td>
<td> 2</td>
<td> 3</td>
<td> 4</td>
<td> 5</td>
</tr>
<tr>
<td> 2 </td>
<td> 3 </td>
<td> 4 </td>
<td> 5 </td>
</tr>
</table>
</body>
</html>