在dw中弄了次，帮我找下问题出在哪，怎么没表格
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>了不起的盖茨比</title>
<style type="text/css">
table tr td,th{border:1px solid:#F00;}
</style>
</head>
<body>
<table summay="">
<tr>
<th>班级</th>
<th>学生数</th>
<th>平均成绩</th>
</tr>
<tr>
<td>一班</td>
<td>30</td>
<td>89</td>
</tr>
<tr>
<td>二班</td>
<td>35</td>
<td>85</td>
</tr>
</table>
</body>
</html>
