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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } th, td { padding:10px; } </style> </head> <body> <h1>colgroup span 属性</h1> <table> <colgroup span="2" style="background:#B0C4DE"></colgroup> <tr> <th>ISBN</th> <th>书名</th> <th>价格</th> </tr> <tr> <td>3476896</td> <td>HTML 教程</td> <td>$39</td> </tr> <tr> <td>5869207</td> <td>CSS 教程</td> <td>$27</td> </tr> </table> </body> </html>