abstract：<!DOCTYPE html><html> <head><meta charset="utf-8"> <title>HELLO HTML</title> </head><body>（元素）<div style="background: red"he
<!DOCTYPE html>
<html> <head>
<meta charset="utf-8">
<title>HELLO HTML</title> </head>
<body>
（元素）
<div style="background: red"height:300px;width:400px;>块元素</div>块级标签
</body>
</html>
Correcting teacher：灭绝师太Correction time：2019-03-21 09:09:16
Teacher's summary：前端开始的学习比较基础,后面的知识点会越来越多,好好加油!