<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>页面结构</title>
</head>
<body>
<header>
<h2>网页头部</h2>
</header>
<section>
<h2>网页主体</h2>
</section>
<footer>
<h2>网页尾部</h2>
</footer>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>页面结构</title>
</head>
<body>
<header>
<h2>网页头部</h2>
</header>
<section>
<h2>网页主体</h2>
</section>
<footer>
<h2>网页尾部</h2>
</footer>
</body>
</html>