一，效果图。
二，代码。
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS 盒子模型</title> <style> div.ex { width: 220px; padding: 10px; border: 5px solid gray; margin: 0px; } </style> </head> <body> <img src="w3css.gif" width="250" height="250" /> <div class="ex">the picture above is 250px wide.the total width of this element is also 250px.</div> </body> </html>
参考资料:《菜鸟教程》