51help TIY
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> <col span="2" style="background-color:red" /> <tr> <th>ISBN</th> <th>Title</th> <th>Price</th> </tr> <tr> <td>3476896</td> <td>My first HTML</td> <td>$53</td> </tr> </table> </body> </html>
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