案例:html/html5 案例     状态:可编辑再运行    进入竖版
 运行结果 
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<html>
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<body>
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<h3>Solar System</h3>
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<ul>
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  <li><a href="/example/html/sun.html" target="view_window">Sun</a></li>
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  <li><a href="/example/html/mercur.html" target="view_window">mercury</a></li>
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  <li><a href="/example/html/venus.html" target="view_window">venus</a></li>
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  <li><a href="/example/html/mars.html" target="view_window">mars</a></li>
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</ul>
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</body>
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</html>