這節(jié)課的任務(wù)怎么做啊？
這節(jié)課的怎么做?。?/p>
漠北孤狼LPF
2016-12-23
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2016-12-23
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>邊距</title>
<style type="text/css">
div{
? ? width:300px;
? ? height:300px;
border:1px solid red;
}
#box1{margin-bottom:30px;}
</style>
</head>
<body>
? ? <div id="box1">box1</div>
? ? <div id="box2">box2</div> ??
</body>
</html>