abstract：<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> <style> .box{ width: 200px; height: 200px; border: 1px solid #bbb;
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.box{
width: 200px;
height: 200px;
border: 1px solid #bbb;
padding: 2px;/*上右下左*/
margin:3px
}
button{
border: none;
border-radius: 5px;
box-shadow: 2px 2px 3px #000000;
}
</style>
</head>
<body>
<div class="box">111</div>
<button>按我</button>
</body>
</html>
Correcting teacher：韦小宝Correction time：2019-01-21 09:14:26
Teacher's summary：写的很不错 很基础的小案例 课后一定要多练习哦