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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/3.2.0/css/bootstrap.min.css"> </head> <body> <div class="container"> <h2>排版</h2> <p>设置 pre 元素可滚动：</p> <pre class="pre-scrollable"> 内容可滚动 Text in a pre element is displayed in a fixed-width font, and it preserves both spaces and line breaks. Text in a pre element is displayed in a fixed-width font, and it preserves both spaces and line breaks. </pre> </div> <script src="//apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="//apps.bdimg.com/libs/bootstrap/3.2.0/js/bootstrap.min.js"></script> </body> </html>
运行结果
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