<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <!-- 只有h1 - h6 --> <h1>mike</h1> <h2>apple</h2> <h3>jack</h3> <h4>ken</h4> <h5>alex</h5> <h6>peter</h6> <span>helo</span> <span>helo</span> <span>helo</span> <span>helo</span> </body> </html>
