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<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
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<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>
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