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<table>
  <colgroup>
    <col span="2" style="background-color:red">
    <col style="background-color:yellow">
  </colgroup>
  <tr>
    <th>STT</th>
    <th>Họ và tên</th>
    <th>Lương</th>
  </tr>
  <tr>
    <td>01</td>
    <td>Chu Văn A</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>02</td>
    <td>Nguyễn Văn B</td>
    <td>$53</td>
  </tr>
  <tr>
    <td>01</td>
    <td>Chu Văn D</td>
    <td>$25</td>
  </tr>
</table>

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