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<!DOCTYPE html> <html> <head> <style> /* 默认的 CSS 值 */ table, th, td { border: 1px solid black; } colgroup { display: table-column-group; } </style> </head> <body> <p>请看下面的 colgroup 元素如何显示：</p> <table> <colgroup> <col span="2" style="background-color:red"> <col style="background-color:yellow"> </colgroup> <tr> <th>ISBN</th> <th>Title</th> <th>Price</th> </tr> <tr> <td>3476896</td> <td>My first HTML</td> <td>$53</td> </tr> <tr> <td>5869207</td> <td>My first CSS</td> <td>$49</td> </tr> </table> <p>请更改默认 CSS 设置，来查看效果。</p> </body> </html>
运行结果
