51help TIY
码：
<!DOCTYPE html> <html> <body> <em>Emphasized text</em><br /> <strong>Strong text</strong><br /> <dfn>Definition term</dfn><br /> <code>Computer code text</code><br /> <samp>Sample computer code text</samp><br /> <kbd>Keyboard text</kbd><br /> <var>Variable</var><br /> <cite>Citation</cite> </body> </html>
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