abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>边框</title><style type="text/css">.box{width: 300px;height: 300px;border: 1px solid
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>边框</title>
<style type="text/css">
.box{
width: 300px;
height: 300px;
border: 1px solid red;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-04-04 16:21:42
Teacher's summary：完成的不错。刚学习样式，会不习惯，多练习，把常用的作个常用样式文件。继续加油。