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<nav>    <ul>        <li></li>    </ul></nav> | 
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<div></div><p></p><blockquote></blockquote> | 
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<div></div><div>    <p><span></span><em></em></p>    <blockquote></blockquote></div> | 
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<div></div><div>    <p><span></span><em></em></p></div><blockquote></blockquote> | 
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<div>    <header>        <ul>            <li><a href=""></a></li>            <li><a href=""></a></li>        </ul>    </header>    <footer>        <p></p>    </footer></div> | 
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<div>    <dl>        <dt></dt>        <dd></dd>        <dt></dt>        <dd></dd>        <dt></dt>        <dd></dd>    </dl></div><footer>    <p></p></footer> | 
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<ul>    <li></li>    <li></li>    <li></li>    <li></li>    <li></li></ul> | 
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<ul>    <li class="item1"></li>    <li class="item2"></li>    <li class="item3"></li>    <li class="item4"></li>    <li class="item5"></li></ul> | 
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<h1 title="item1">Header 1</h1><h2 title="item2">Header 2</h2><h3 title="item3">Header 3</h3> | 
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<ul>    <li class="item001"></li>    <li class="item002"></li>    <li class="item003"></li>    <li class="item004"></li>    <li class="item005"></li></ul> | 
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<ul>    <li class="item5"></li>    <li class="item4"></li>    <li class="item3"></li>    <li class="item2"></li>    <li class="item1"></li></ul> | 
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<ul>    <li class="item3"></li>    <li class="item4"></li>    <li class="item5"></li>    <li class="item6"></li>    <li class="item7"></li></ul> | 
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<div id="header"></div> | 
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<div class="title"></div> | 
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<form id="search" class="wide"></form> | 
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<p class="class1 class2 class3"></p> | 
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<p title="Hello world"></p> | 
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<td rowspan="2" colspan="3" title=""></td> | 
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<div a="value1" b="value2"></div> | 
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<a href="">Click me</a> | 
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<p>Click <a href="">here</a> to continue</p> | 
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<div class="class"></div> | 
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<em><span class="class"></span></em> | 
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<ul>    <li class="class"></li></ul> | 
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<table>    <tr class="row">        <td class="col"></td>    </tr></table> | 
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<hangge></hangge> | 
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<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <meta name="viewport" content="width=device-width, initial-scale=1.0">  <meta http-equiv="X-UA-Compatible" content="ie=edge">  <title>Document</title></head><body>   </body></html> | 
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<a href=""></a> | 
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 | 
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<a href="mailto:"></a> | 
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<abbr title=""></abbr> | 
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<acronym title=""></acronym> | 
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<base href="" /> | 
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<basefont /> | 
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<br /> | 
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<frame /> | 
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<hr /> | 
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<bdo dir=""></bdo> | 
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<bdo dir="rtl"></bdo> | 
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<bdo dir="ltr"></bdo> | 
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<col /> | 
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<link rel="stylesheet" href="" /> | 
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<link rel="stylesheet" href="style.css" /> | 
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<link rel="stylesheet" href="print.css" media="print" /> | 
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<link rel="shortcut icon" type="image/x-icon" href="favicon.ico" /> | 
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<link rel="apple-touch-icon" href="favicon.png" /> | 
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<link rel="alternate" type="application/rss+xml" title="RSS" href="rss.xml" /> | 
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<link rel="alternate" type="application/atom+xml" title="Atom" href="atom.xml" /> | 
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<meta /> | 
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<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> | 
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<meta http-equiv="Content-Type" content="text/html;charset=windows-1251" /> | 
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<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" /> | 
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<meta http-equiv="X-UA-Compatible" content="IE=7" /> | 
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<style></style> | 
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<script></script> | 
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<script src=""></script> | 
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<img src="" alt="" /> | 
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<iframe src="" frameborder="0"></iframe> | 
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<embed src="" type="" /> | 
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<object data="" type=""></object> | 
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<param name="" value="" /> | 
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<map name=""></map> | 
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<area shape="" coords="" href="" alt="" /> | 
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<area shape="default" href="" alt="" /> | 
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<area shape="circle" coords="" href="" alt="" /> | 
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<area shape="rect" coords="" href="" alt="" /> | 
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<area shape="poly" coords="" href="" alt="" /> | 
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<form action=""></form> | 
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<form action="" method="get"></form> | 
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<form action="" method="post"></form> | 
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<label for=""></label> | 
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<input type="text" /> | 
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<input type="text" name="" id="" /> | 
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<input type="hidden" name="" /> | 
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<input type="hidden" name="" /> | 
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<input type="text" name="" id="" /> | 
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<input type="search" name="" id="" /> | 
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<input type="email" name="" id="" /> | 
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<input type="url" name="" id="" /> | 
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<input type="password" name="" id="" /> | 
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<input type="password" name="" id="" /> | 
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<input type="datetime" name="" id="" /> | 
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<input type="date" name="" id="" /> | 
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<input type="datetime-local" name="" id="" /> | 
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<input type="month" name="" id="" /> | 
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<input type="week" name="" id="" /> | 
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<input type="time" name="" id="" /> | 
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<input type="number" name="" id="" /> | 
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<input type="color" name="" id="" /> | 
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<input type="checkbox" name="" id="" /> | 
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<input type="checkbox" name="" id="" /> | 
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<input type="radio" name="" id="" /> | 
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<input type="radio" name="" id="" /> | 
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<input type="range" name="" id="" /> | 
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<input type="file" name="" id="" /> | 
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<input type="file" name="" id="" /> | 
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<input type="submit" value="" /> | 
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<input type="submit" value="" /> | 
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<input type="image" src="" alt="" /> | 
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<input type="image" src="" alt="" /> | 
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<input type="button" value="" /> | 
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<input type="button" value="" /> | 
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<isindex /> | 
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<input type="reset" value="" /> | 
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<select name="" id=""></select> | 
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<option value=""></option> | 
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<textarea name="" id="" cols="30" rows="10"></textarea> | 
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<menu type="context"></menu> | 
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<menu type="context"></menu> | 
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<menu type="toolbar"></menu> | 
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<menu type="toolbar"></menu> | 
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<video src=""></video> | 
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<audio src=""></audio> | 
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<keygen /> | 
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<command /> | 
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 1 
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<blockquote></blockquote> | 
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<acronym title=""></acronym> | 
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<figure></figure> | 
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<figcaption></figcaption> | 
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<iframe src="" frameborder="0"></iframe> | 
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<embed src="" type="" /> | 
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<object data="" type=""></object> | 
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<source></source> | 
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<caption></caption> | 
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<colgroup></colgroup> | 
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<fieldset></fieldset> | 
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<button></button> | 
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<button type="button"></button> | 
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<button type="reset"></button> | 
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<button type="submit"></button> | 
原文:http://www.cnblogs.com/Andyyz/p/7491050.html