摘要：<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>第三课</title>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>第三课</title>
<style media="screen">
.box,.box_1,.box_2,.box_3,.box_4{width:100px; height:100px;margin:10px 0 10px;}
.box{border:1px solid #ccc; }
.box_1{border:1px double #ccc;}
.box_2{border:1px dashed #ccc;}
.box_3{border:1px dotted #ccc;}
.box_4{border:1px solid #ccc;border-radius:10px;}
button{border:none;width:100px;height:30px;}
</style>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<button>登陆</button>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>第三课</title>
<style media="screen">
.box,.box_1,.box_2,.box_3,.box_4{width:100px; height:100px;margin:10px 0 10px;}
.box{border:1px solid #ccc; }
.box_1{border:1px double #ccc;}
.box_2{border:1px dashed #ccc;}
.box_3{border:1px dotted #ccc;}
.box_4{border:1px solid #ccc;border-radius:10px;}
button{border:none;width:100px;height:30px;}
</style>
</head>
<body>
<div class="box"></div>
<div class="box_1"></div>
<div class="box_2"></div>
<div class="box_3"></div>
<div class="box_4"></div>
<button>登陆</button>
</body>
</html>
批改老师：灭绝师太批改时间：2018-11-19 09:16:55
老师总结：刚开始学习的话还是要记一下 备注清楚，标签属性的用法
