Html th和tr标签功能混乱

我的html表格中有以下代码

<table>
<tbody>
    <thead>
        <tr>
            <th align="right" colspan="4">
                <span class="font-style-bold">SCHEDULE OF RATES</span>
            </th>
        </tr>
    </thead>
    <thead>
        <tr>
            <th class="align-left">
                <div class="para">
                </div>
            </th>
            <th class="align-left">
                <div class="para">
                </div>
            </th>
            <th class="align-left">
                <div class="para">
                    <span class="font-style-bold">Unit</span>
                </div>
            </th>
            <th class="align-left">
                <div class="para">
                    <span class="font-style-bold">Rate $</span>
                </div>
            </th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td rowspan="align-left">
                <div class="para">
                </div>
            </td>
            <td rowspan="align-left">
                <div class="para">
                    <span class="font-style-boldunderline">ROOFER</span>
                </div>
            </td>
            <td rowspan="align-left">
                <div class="para">
                </div>
            </td>
            <td rowspan="align-left">
                <div class="para">
                </div>
            </td>
        </tr>
        <tr>
    </tbody>
</tbody>

当我运行这个程序时，我会看到下面的屏幕

当我将

th

更改为

td

时，我会看到下面的屏幕（这就是我想要的）。我只是想知道为什么会有这种差异，而且，这种情况在

th

---

一个表中只能有一个thead和tbody。两者都应该是

标记的直接子级

<table>
  <thead>
    <tr>
      <th align="right" colspan="4">
        <span class="font-style-bold">SCHEDULE OF RATES</span>
      </th>
    </tr>
    <tr>
      <th class="align-left">
        <div class="para">
        </div>
      </th>
      <th class="align-left">
        <div class="para">
        </div>
      </th>
      <th class="align-left">
        <div class="para">
          <span class="font-style-bold">Unit</span>
        </div>
      </th>
      <th class="align-left">
        <div class="para">
          <span class="font-style-bold">Rate $</span>
        </div>
      </th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
          <span class="font-style-boldunderline">ROOFER</span>
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
    </tr>
  </tbody>
</table>

差饷表
单位
比率$
屋顶工

你的CSS会很有用，请：）任何分配给

th

的

CSS

？嗨，尼特·达克贝尔和瑞恩：谢谢你提醒我CSS，我已经用CSS更新了我的问题，再次感谢：）表中可能只有一个

。使用

作为第一个描述table@user2423959这段代码有很多错误。在开始获得所需布局之前，您需要先将其清理干净。

<table>
  <thead>
    <tr>
      <th align="right" colspan="4">
        <span class="font-style-bold">SCHEDULE OF RATES</span>
      </th>
    </tr>
    <tr>
      <th class="align-left">
        <div class="para">
        </div>
      </th>
      <th class="align-left">
        <div class="para">
        </div>
      </th>
      <th class="align-left">
        <div class="para">
          <span class="font-style-bold">Unit</span>
        </div>
      </th>
      <th class="align-left">
        <div class="para">
          <span class="font-style-bold">Rate $</span>
        </div>
      </th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
          <span class="font-style-boldunderline">ROOFER</span>
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
      <td rowspan="align-left">
        <div class="para">
        </div>
      </td>
    </tr>
  </tbody>
</table>