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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS 属性选择器</title>
<style>
abbr[title] {
color: red;
}
</style>
</head>
<body>
<p><abbr title="Hyper Text Markup Language">HTML</abbr>是万维网的发布语言</p>
</body>
</html>