xxxxxxxxxx
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>编程狮(w3cschool.cn)</title>
</head>
<body>
<strong>重点（strong）
<em>重点强调（strongly emphasised）？</em>
</strong>
<em>这又是什么鬼？</em>
</body>
</html>