源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>编程字典</title> </head> <body> <h1>标题 1</h1> <h2>标题 2</h2> <h3>标题 3</h3> <h4>标题 4</h4> <h5>标题 5</h5> <h6>标题 6</h6> </body> </html>
运行结果