加粗斜體代碼的一行有什么問題嗎？
<!DOCTYPE html>
<html>
<head>
??? <meta charset="UTF-8">
??? <title>使用thead、tbody、tfoot標簽</title>
</head>
<body>
??? <h3>成績表</h3><hr/>
??? <table border="1">
?<caption>成績表</caption>??
?<thead>
???? <tr>
???????? <th>科目</th>
???????? <th>分數</th>
???? </tr>
?</thead>
?<tbody>
???? <tr>
???????? <td>語文</td>
???????? <td>99</td>
???? </tr>
???? <tr>
???????? <td>數學</td>
???????? <td>60</td>
???? </tr>
???? </tbody>
???? <tfoot>
????????? <td>總分</td>
???????? <td>159</td>
???? </tfoot>
?
?</table>
</body>
</html>
2021-02-18
沒有<tr>,應該是
? ? ?<tr>
???????? <td>總分</td>
???????? <td>159</td>
???? </tr>
2021-02-17
<table border="1">錯了
應該是：
<table border=1>
沒有雙引號