<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css</title>
<style type="text/css">
#one1{text-decoration:overline;}
#one2{text-decoration:line-through;}
#one3{text-decoration:underline;}
</style>
</head>
<body>
<div id="one1">我要好好学习 上划线</div>
<br>
<div id="one2">我要好好学习 删除线</div>
<br>
<div id="one3">我要好好学习 下划线</div>
</body>
</html>
返回：