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来源：2-17 编程练习

慕UI4313976

2020-03-04 20:10:33

<!DOCTYPE html>
<html>
    <head lang="en">
        <meta charset="UTF-8">
        <title>动态伪类</title>
        <style type="text/css">
            /*此处写代码*/
            input{
                width: 250px;
                height: 25px;
                border: 1px solid black;
            }
            input:hover{border:1px solid red}
            input[type="text"]:focus{background: orange;}
            input[type="password"]:focus{background: yellow;}
        </style>
    </head>
    <body>
        <!-- 此处写代码 -->
        用户名：<input type="text">
        <br>
        <br>
        密码：<input type="password">
    </body>
</html>

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