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代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <style> #main { display: flex; flex-direction:row-reverse; } #main div { width: 40px; height: 40px; } </style> <div id="main"> <div style="background-color:coral;">A</div> <div style="background-color:lightblue;">B</div> <div style="background-color:khaki;">C</div> <div style="background-color:pink;">D</div> <div style="background-color:lightgrey;">E</div> <div style="background-color:lightgreen;">F</div> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：