种一棵树最好的时间是十年前，其次是现在

托马斯小火车喷雾又喷烟，一直喷，喷喷喷.

于 2016-10-28 08:01:47 发布

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CSS position

<html>
	<head>
		<style type="text/css">
			#a {
				position: absolute;
				left: 50px;
				top: 50px;
				color: red
			}
			#b {
				position: fixed;
				left: 100px;
				top: 100px;
				color: blue
			}
			#c {
				position: relative;
				left:200px;
				color: pink
			}
		</style>
	</head>
	<body>
		<span id="a">a wgb，nwsmhbs???</span>
		<span id="b">b wgb，nwsmhbs???</span>
		<span id="c">c wgb，nwsmhbs???</span>
	</body>
</html>