3.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
       <form action="#">
        用户名: <input type="text">
        <br> <br>
        密码： <input type="password">
        <br> <br>
        <button type="button">按钮</button>
        <button type="reset">重置</button>
        <button type="submit">提交答案</button>


       </form>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
</body>
</html>