Bootstrap 图像—

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Bootstrap 图像 - 迹忆客(jiyik.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>
​
<img src="/demo_source/download.png" class="img-rounded">
<img src="/demo_source/download.png" class="img-circle">
<img src="/demo_source/download.png" class="img-thumbnail">
​
</body>
</html>