W3School TIY
编辑您的代码：
<html> <body> <table width="100%" border="1"> <tr> <th>Month</th> <th>Savings</th> </tr> <tr> <td colspan="2">January</td> </tr> <tr> <td colspan="2">February</td> </tr> </table> </body> </html>
查看结果: