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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <style> img { max-width: 100%; height: auto; } </style> </head> <body> <h2>响应式图片</h2> <p>响应式图片会自动适配各种尺寸的屏幕。</p> <p>通过重置浏览器大小查看效果:</p> <img src="http://www.w3big.com/wp-content/uploads/2016/04/trolltunga.jpg" alt="Norway" width="1000" height="300"> </body> </html>