作用:表格
<table border="1"><tr><th>Month</th><th>Savings</th></tr><tr><td>January</td><td>$100</td></tr></table>
<table border="1"><tr>-----------------------------------------行<th>Month</th>------------------------标题列<th>Savings</th>-----------------------标题列</tr><tr>-----------------------------------------行<td>January</td>-----------------------单元格<td>$100</td>---------------------------单元格</tr></table>