console 命令行工具 X clear

console

<HTML>
  <HEAD>
    <TITLE>k</TITLE>
    <style type="test/css">
    .center{
    text-align:center;
    }
    </style>
    </HEAD>
  <BODY>
    <h1 class="center">
This heading will be center-aligned
</h1>

<p class="center">
This paragraph will also be center-aligned.
</p>
    </BODY>
  </HTML>