老师，请检查

来源：2-3 编程练习

qq_触掱钶忣倖福_0

2019-02-03 15:20:39

<!DOCTYPE html>
<html>
<head>
   <title>jQuery</title>
   <meta charset="utf-8">


</head>
<body>
   <div>慕课网</div>
   <script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
   <script type="text/javascript">
       $(document).ready(function(){
           $('div').addClass('Tom');
       })
   </script>
</body>
</html>