源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu(wfuyu.com)</title> </head> <body> <h1>这是标题1</h1> <h2>这是标题2</h2> <h3>这是标题 3</h3> <h4>这是标题 4</h4> <h5>这是标题 5</h5> <h6>这是标题 6</h6> </body> </html>
运行结果：