et.css

在实际教学应用中

/* CSS Document */
<style type="text/css">
body,td,th {font-size: 14px;}
body {
	margin-top: 2px;
	margin-left: 20px;
}
.line_hight{line-height: 4px;}
.explain_hight{line-height: 20px;}
.red {color: #FF0000}
.blue{color: #0000FF}

.font_12{font-size: 12}
a:link {
	text-decoration: none;
}
a:visited {
	text-decoration: none;
}
a:hover {
	text-decoration: underline;
}
a:active {
	text-decoration: none;
}
</style>