有时你可能需要让表格中的某个单元格跨越多个列。
<!DOCTYPE html>
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<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
th,td{
border: 1px solid red;
}
</style>
</head>
<body>
<div>TODO write content</div>
<table>
<tr>
<th></th>
<th>第一行</th>
<th>第二行</th>
<th>第三行</th>
<th>第四行</th>
</tr>
<tr>
<th>第一列</th>
<td colspan="2">填写的内容</td>
<td>填写的内容</td>
<td>填写的内容</td>
</tr>
<tr>
<th>第二列</th>
<td colspan="3">填写的内容</td>
<td>填写的内容</td>
</tr>
</table>
</body>
</html>