w3school TIY
编辑您的代码：
<!DOCTYPE html> <html> <head> <style type="text/css"> table{border-collapse:collapse;width:100%} table, td, th{border:1px solid black;} </style> </head> <body> <table> <colgroup span="2" style="background-color:#e80000" /> <tr> <td>Adams</td> <td>Bush</td> <td>Carter</td> </tr> <tr> <td>London</td> <td>New York </td> <td>Beijing</td> </tr> </table> </body> </html>
查看结果: