em: 强调内容

2017-06-05 11:17:00
admin
原创
459
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>元素em</title>
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<body>
<p>
The INS and DEL elements <em>must not</em> contain block-level content when these elements behave as inline elements.
</p>
</body>
</html>
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