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源代码：
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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> </head> <body> <div class="container"> <h2>背景</h2> <p class="bg-success">该段落使用了类 "bg-success"。</p> <a class="bg-success" href="/tutorial/index">该链接使用了类 "bg-success"。</a> </div> <script src="//apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="//apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script> </body> </html>
运行结果
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