编辑下面的代码:【加编码】
<html> <body> <em>Emphasized text</em><br> <strong>Strong text</strong><br> <dfn>Definition term</dfn><br> <code>A piece of computer code</code><br> <samp>Sample output from a computer program</samp><br> <kbd>Keyboard input</kbd><br> <var>Variable</var> </body> </html>
结果: 【此窗口】 帮助?
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