console 命令行工具 X clear
console
<html>
    <head>
        <title></title>
    </head>
    <body>
        <h2>图像设计软件</h2>
        <ul type=square>
            <li>Photoshop</li>
            <li>CorelDreaw</li>
        </ul>
        <h2>图像设计软件</h2>
        <ol type=a start=2>
            <li>Illustrator</li>
            <li>Freehand</li>
        </ol>
        <p>x<sup>2</sup>=y</p>
<pre>
***********
*         *
***********
*         *
***********
        </pre>
    </body>
</html>