案例:html/html5 案例     状态:可编辑再运行    进入竖版
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<!DOCTYPE HTML>
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<html>
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<body>
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<details>
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<summary>Copyright 2011.</summary>
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<p>All pages and graphics on this web site are the property of W3xue.</p>
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</details>
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</body>
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</html>
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