成绩表和表格之间的分割线应该怎么加
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>使用thead、tbody、tfoot标签</title>
</head>
<body>
<table border="1">
<caption>成绩表</caption>
<thead>
<tr>
<th>科目</th>
<th>分数</th>
</tr>
</thead>
<tbody>
<tr>
<th>语文</th>
<th>99</th>
</tr>
<tr>
<th>数学</th>
<th>60</th>
</tr>
</tbody>
<tfoot>
<tr>
<th>总分</th>
<th>159</th>
</tr>
</tfoot>
</table>
</body>
</html>