页面结构
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>页面结构分析title>
head>
<body>
<header>
<h2>网页头部h2>
header>
<section>
<h2>网页主体h2>
section>
<footer>
<h2>网页脚部h2>
footer>
body>
html>
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>页面结构分析title>
head>
<body>
<header>
<h2>网页头部h2>
header>
<section>
<h2>网页主体h2>
section>
<footer>
<h2>网页脚部h2>
footer>
body>
html>