abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Document</title><style>ul li{list-style: none;width: 150px;height: 50px;line-height: 50px;te
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
ul li{list-style: none;width: 150px;height: 50px;line-height: 50px;text-align: center;background-color: gray;margin: 0px 1px;float: left;}
#f{width: 100px;height: 50px;background-color: skyblue;float: right;margin: 2px 5px;text-align: center;line-height: 50px;}
#clear{clear: left;}
</style>
</head>
<body>
<ul>
<li>html</li>
<li>php</li>
</ul>
<div id="clear"></div>
<div id="f">jquery</div>
<div id="f">tp5框架</div>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2018-12-22 13:38:55
Teacher's summary：你的css选择符的命名太随意了, 希望以后用一些有意义的名称 ,毕竟,代码不是给你一个人看,对不?