Hello I have been trying to make a flex box in CSS like the image below
but I have a problem that's look like this image 
看起来 div 号 3 将所有东西都推到这里就是代码
#flexcontainer
{
width: 500px;
height: 210px;
border: 3px solid black;
display: flex;
flex-wrap: wrap;
padding: 5px;
}
.flexitem
{
background: yellow;
width : 150px;
text-align: center;
height: 100px;
line-height: 100px;
margin: 2px;
}
.two
{
width : 200px;
}
.three
{
width : 120px;
height: 100%;
}
我还尝试使用align-self属性并将其设置为拉伸到.三，但它也不起作用。这是html代码
<!DOCTYPE html>
<html lang="en">
<head>
<title>
Project Name
</title>
<link rel="stylesheet" type="text/css" href="main.css">
</head>
<body>
<div id="flexcontainer">
<div class="flexitem one">1</div>
<div class="flexitem two">2</div>
<div class="flexitem three">3</div>
<div class="flexitem four">4</div>
<div class="flexitem four">5</div>
</div>
</body>
</html>
其实你可以包裹flexcolumns然后对孩子们重新排序：
#flexcontainer {
width: 500px;
height: 210px;
border: 3px solid black;
display: flex;
flex-flow: column wrap;
padding: 5px;
}
.flexitem {
background: yellow;
width: 150px;
text-align: center;
height: 100px;
line-height: 100px;
margin: 2px;
}
.two {
width: 200px;
order: 3;
}
.three {
width: 120px;
height: 100%;
order: 5;
}
.five { order: 4; }<div id="flexcontainer">
<div class="flexitem one">1</div>
<div class="flexitem two">2</div>
<div class="flexitem three">3</div>
<div class="flexitem four">4</div>
<div class="flexitem five">5</div>
</div>js小提琴：https://jsfiddle.net/azizn/12xkrtp4/ https://jsfiddle.net/azizn/12xkrtp4/