为啥17和23行报错啊
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>使用thead、tbody、tfoot标签</title>
</head>
<body>
<table border="1">
<thead>
<tr>
<th>科目</th>
<th>分数</th>
</tr>
</thead>
<tboday>
<tr>
<td>语文</td>
<td>数学</td>
<td>英语</td>
</tr>
</tboday>
</table>
</body>
</html>
