<!DOCTYPE html>标签：表格,--,px,tr,table,td From： https://www.cnblogs.com/zhouhongbao/p/18636114
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表格学习</title>
</head>
<body>
<!--
表格 table
行 tr
列 td
border 边框线宽度(px)
-->
<table border="1px">
<tr>
<!--colspan="X" 跨列-->
<td colspan="4">1-1</td>
</tr>
<tr>
<!--rowspan="X" 跨行-->
<td rowspan="2">2-1</td>
<td>2-2</td>
<td>2-3</td>
<td>2-4</td>
</tr>
<tr>
<td>3-1</td>
<td>3-2</td>
<td>3-3</td>
</tr>
</table>
</body>
</html>