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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <h1>表头</h1> <h2>水平表头：</h2> <table> <tr> <th>姓名</th> <th>电邮</th> <th>电话</th> </tr> <tr> <td>Bill Gates</td> <td>bill.gates@example.com</td> <td>138-1234-5678</td> </tr> </table> <h2>垂直表头：</h2> <table> <tr> <th>姓名:</th> <td>Bill Gates</td> </tr> <tr> <th>电邮:</th> <td>bill.gates@example.com</td> </tr> <tr> <th>电话:</th> <td>138-1234-5678</td> </tr> </table> </body> </html>