为什么不能在<h1>标签里写，直接定义该标签内容的样式呢
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Html和CSS的关系</title>
<style type="text/css">
</head>
<body>
<h1 style type="color:#930,font-size:12px,text-align:center">Hello World!</h1>
</body>
</html>
