table td 宽度的问题
<table>
<tr>
<td width="100px"> A </td>
<td width="50%" > B </td>
<td width="100px"> C </td>
<td width="50%" > D </td>
</tr>
</table>
<table width="100%" >
<tr>
<td width="100px"> A </td>
<td style="background-color:red" > B </td>
<td width="100px"> C </td>
<td style="background-color:green"> D </td>
</tr>
</table>
<table width="100%">
<tr>
<td width="100"> A </td>
<td> B </td>
<td width="100"> C </td>
<td> D </td>
</tr>
</table>
<table style=" table-layout: fixed;word-break:break-all;word-wrap:break-word;width:100%" >
<tr>
<td width="100px"> A </td>
<td > B </td>
<td width="100px"> C </td>
<td >
Dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
ddddddddddddddddddddddddddddddddddddd</td>
</tr>
</table>