實現效果如下:
<table>
<tr>
<th rowspan="2">品種</th>
<th colspan="3" align="center">規格</th>
<th rowspan="2">數量</th>
<th rowspan="2">單價</th>
<th rowspan="2">操作</th>
</tr>
<tr>
<th>克重</th>
<th>長</th>
<th>寬</th>
</tr>
</table>