麻烦老师看一下这样写对不？

来源：4-2 编程练习

丹叔

2020-10-19 19:42:25

<!DOCTYPE html>
<html>

<head lang="en">
    <meta charset="UTF-8">
    <title>display属性</title>
    <style type="text/css">
    div {
        width: 200px;
    }
    /*补充样式*/
        div ul{display: none;}
        div:hover ul{
        display:inline;}
    </style>
</head>

<body>
    <div>
        <h2>家电</h2>
        <ul>
            <li>冰箱</li>
            <li>空调</li>
            <li>洗衣机</li>
        </ul>
    </div>
</body>
</html>