console 命令行工具 X clear
console
<!DOCTYPE html>
<!-- Text_decoration01.html -->
<html>
<head>
    <style>
        #firstp {
            text-decoration : underline;
        }
        #secondp {
            text-decoration : line-through;
        }
        #thirdp {
            text-decoration : overline;
        }
    </style>
</head>
<body>

    <p id="firstp"> First paragraph </p>
    <p id="secondp"> Second paragraph </p>
    <p id="thirdp"> Third paragraph </p>
</body>
</html>