麻烦老师帮我检查一下代码，谢谢

来源：3-12 编程练习

芜湖呼

2021-07-28 23:07:40

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
<title></title>
<style>
    *{
        margin: 0px;
        padding: 0px;
    }
    aside{
        position: fixed;
        width: 224px;
        height: 364px;
        top: 50%;
        margin-top: -182px;
    }
    .leftAd{
        left:0px;

    }
    .rightAd{
        right:0px;
    }
    main img{
        width: 100%;

    }
</style>
</head>
<body>
    <aside class="leftAd">
    <img src="http://climg.mukewang.com/5a3383d00001a3dd02240364.png" alt="图片丢失">
</aside>
<main>
    <img src="http://climg.mukewang.com/59c9f7ce0001839219034033.png" alt="图片丢失">
</main>
<aside class="rightAd">
    <img src="http://climg.mukewang.com/5a3383c70001f1b702240364.png" alt="图片丢失">
</aside>

</body>
</html>