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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <h3>如何访问 TR 元素的演示</h3> <table> <tr id="myRow"> <td>First cell</td> <td>Second cell</td> <td>Third cell</td> </tr> </table> <p>单击该按钮可从表格行中删除第一个单元格。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { var row = document.getElementById("myRow"); row.deleteCell(0); } </script> </body> </html>