表格布局

图片大于表格宽高时，必须设置图片本身的宽高值吗？只设置表格的宽高，表格还是会被扩大。我记得老师只设置了表格的值？

<table width="600" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr height="200">
    <td height="200" colspan="3" title="母婴"><a href="https://cuxiao.suning.com/ccjhr.html"><img src="images/母婴.jpg" width="440" height="200" /></a></td>
    <td width="154" height="200" title="电磁炉"><a href="https://product.suning.com/0000000000/103996549.html"><img src="images/电磁炉.jpg" width="154" height="200" /></a></td>
  </tr>
  <tr valign="top" height="100">
    <td width="146" height="100" title="品牌惠"><a href="https://ju.suning.com/pc/brandGroup-2.html"><img src="images/品牌惠.jpg" width="146" height="100" /></a></td>
    <td width="145" height="100" title="美的"><a href="https://ju.suning.com/pc/brandComm-100065030-2.html"><img src="images/美的.jpg" width="145" height="100" /></a></td>
    <td width="145" height="100" title="水饮"><a href="https://ju.suning.com/pc/brandComm-100065118-1.html"><img src="images/水饮.jpg" width="145" height="100" /></a></td>
    <td width="154" height="100" title="量贩"><a href="https://pindao.suning.com/amountSale_V2.html"><img src="images/量贩惠.jpg" width="154" height="100" /></a></td>
  </tr>
</table>