abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
div {
/* border: 1px solid red; */
background-color: #960057;
height: 50px;
text-align: center;
line-height: 50px;
}
#left,
#middle,
#right {
float: left;
width: 33.33%;
background-color: #009688;
}
#footer {
clear: both;
background-color: #005a96;
}
#left {
background-color: #009607;
}
#right {
background-color: #009607;
}
</style>
</head>
<body>
<div id="header">头部信息</div>
<div id="left">左栏信息</div>
<div id="middle">中栏信息</div>
<div id="right">右栏信息</div>
<div id="footer">脚部信息</div>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-04-30 09:05:16
Teacher's summary：完成的不错。浮动一般手机网页用的比较多。继续加油