table border=1px width=300px tr td colspan=2图书td tr tr td西游记td td水浒传td tr table 第一行合并居中

To merge the first row and align it to the center in the table, you can use the "colspan" attribute in the <td> tag and apply CSS to center align the content. Here is the modified code:

<table border="1px" width="300px">
  <tr>
    <td colspan="2" style="text-align: center;">图书</td>
  </tr>
  <tr>
    <td>西游记</td>
    <td>水浒传</td>
  </tr>
</table>

In this code, the colspan="2" attribute in the first <td> tag merges the cell across two columns, and the style="text-align: center;" applies CSS to center align the content within the cell