<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>图片</h2> <p> .img-responsive类让图片支持响应式，将很好地扩展到父元素 (通过改变窗口大小查看效果):</p> <img src="tu/cat.jpg" class="img-responsive" alt="Cinque Terre" width="304" height="236"> </div> </body> </html>
