web基础，用html元素制作web页面

<div id="container" style="width: 400px">
    <div id="header" style="background-color:#FFA500;"><h2 align="center" style="margin-bottom:0;">登陆</h2></div>
    <div id="content">
        <form>
            用户名：<input type="text" name="username" placeholder="请输入用户名"><br>
            密码：<input type="password">
            <br>
            <input type="radio" name="role" value="stu">student
            <input type="radio" name="role" value="tea">teacher
            <br>
            <input type="checkbox" value="true"><span>记住我</span> <a href="">登陆遇到问题</a><br>
            <input type="button" value="login" onclick="alert(‘登陆验证‘)">
            <input type="button" value="cancel">
        </form>>
    </div>
    <div id="footer" style="background-color:#FFA500;clear:both;text-align: center;"><i>版权@mis15</i> duym</div>
    </div>

<hr><br>

    <div id="container" style="width: 400px "...>

        <div>
            <select>
                <option>收藏</option>
                <option>点赞</option>
                <option>评论</option>
            </select>
                    <ul>
                        <li>python</li>
                        <li>html</li>
                        <li>CSS</li>
                        <li>JavaScrip</li>
                    </ul>
        </div>

        <div>
            <select>
                <option>收藏</option>
                <option>点赞</option>
                <option>评论</option>
            </select>
                    <ol>
                        <li>python</li>
                        <li>html</li>
                        <li>CSS</li>
                        <li>JavaScrip</li>
                    </ol>
        </div>

        <div>
            <select>
                <option>收藏</option>
                <option>点赞</option>
                <option>评论</option>
            </select>
                    <dl>
                        <li>python</li>
                        <li>html</li>
                        <li>CSS</li>
                        <li>JavaScrip</li>
                    </dl>
        </div>