HTML创建表格格式

<table>
    <thead>
    <tr>
        <th>序号</th>
        <th>内容一</th>
        <th>内容二</th>
    </tr>
    </thead>
    <tbody>
    <tr>
        <td><input type="checkbox"></td>
        <td>123</td>
        <td>456</td>
    </tr>
    <tr>
        <td><input type="checkbox"></td>
        <td>123</td>
        <td>456</td>
    </tr>
    <tr>
        <td><input type="checkbox"></td>
        <td>123</td>
        <td>456</td>
    </tr>
</table>