急急急 求解ablosute
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>绝对定位</title>
<style type="text/css">
*{
margin:0;
padding:0;
}
.box1{
background-color: #ddeef6;
width:100%;
height:100px;
}
.box2{
background-color: pink;
width:100%;
height:100px;
position:absolute;
}
.box3{
background-color: purple;
width:100%;
height:100px;
}
</style>
</head>
<body>
<div>box1</div>
<div>box2</div>
<div>box3</div>
</body>
</html>
为啥加上position：absolute;这一句，box3就不显示了呢
我见老师的显示的挺好的呢，求解
