以下哪些是符合HTML5编码规范（填写序号，以中文逗号分割）：____________ 1) 应当通过添加适当的注释提高代码的可读性； 2）应当确保所有HTML标签都应该成对出现； 3）应当采用代码行缩进的方式保持良好的树形结构；

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小小草 LV1 2023年9月23日 23:20 发表

以下是符合HTML5编码规范的序号：1,2,3,4。解析： 1）应当通过添加适当的注释提高代码的可读性； 2）应当确保所有HTML标签都应该成对出现； 3）应当采用代码行缩进的方式保持良好的树形结构； 4）应当在文档开头添加文档类型声明； 5）对文档标题和字符集可以不用书写，减小HTML体积，提高加载速度。但是这并不符合HTML5编码规范，因为HTML5规范中建议在标签中添加标签来定义文档标题，并且也建议在<head>标签中添加<meta charset="UTF-8">标签来指定字符集。</div> </div> <div style="text-align: center;margin-top: 10px"> <span data-id="24902" onclick="like_question(this)" style="font-size: 15px; color: #FFB800;cursor: pointer"> <i class="layui-icon"></i> 收藏(<span id="questionlikecount-24902">0</span>)</span> <span style="margin-left:30px;" class="copyshare"><i class="layui-icon" style="font-size: 15px; color: #1E9FFF;cursor: pointer"> 分享</i></span> </div> <div style="margin-top: 10px"> 相关标签： <span> <a href="/forum/?page=1&tag=%E6%99%BA%E8%83%BD%E9%97%AE%E7%AD%94" class="community-tag">智能问答</a> </span> </div> </div>  <div class="fly-panel detail-box" id="flyReply"> 问题没解决？让AI助手帮你作答 <a href="http://chat.xinzhiai.cn" class='fly-link ai-assistant-link' target="_blank"> AI助手 </a> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>0个回复</legend> </fieldset>  <ul class="jieda"> <li class="fly-none">消灭零回复</li> </ul> <div class="layui-form layui-form-pane">  <input type="hidden" id="question_id" value="24902"> <div class="layui-form-item layui-form-text"> <a name="comment"></a> <div class="layui-input-block"> <textarea id="comment_content" name="content" required lay-verify="required" placeholder="请输入内容" class="layui-textarea fly-editor" style="height: 150px;"></textarea> </div> </div> <div class="layui-form-item"> <input type="hidden" name="jid" value="123"> <button class="layui-btn" lay-filter="*" onclick="commentQ()">回复</button> </div>   </div> </div> <form class="layui-form" id="admin-panel" style="display:none"> <input style="display: none" name="id" value="24902"> <div class="layui-form-item" > <label class="layui-form-label" style="padding: 9px 0px;text-align: center">所在专栏</label> <div class="layui-input-block" style="margin-left: 80px"> <select lay-verify="required" id="column2" name="column2" > <option></option> <option value="1">提问</option> <option value="2" >分享</option> <option value="3">建议</option> <option value="4">讨论</option> <option value="6" selected="selected">动态</option> <option value="9">其它</option> </select> </div> </div> <div class="layui-form-item"> <div class="layui-inline"> <label class="layui-form-label" style="padding: 9px 0px;text-align: center">阅读权限</label> <div class="layui-input-block" style="margin-left: 80px;"> <select lay-verify="required" id="permission" name="permission"> <option value="0" selected="selected">默认，所有用户可见</option> <option value="1">LV1及以上用户可见</option> <option value="2">LV2及以上用户可见</option> <option value="3">LV3及以上用户可见</option> <option value="4">LV4及以上用户可见</option> <option value="5">LV5及以上用户可见</option> <option value="6">LV6及以上用户可见</option> <option value="10">会员专享</option> <option value="19">管理员可见</option> </select> </div> </div> </div> <div class="layui-form-item"> <button style="float: right" class="layui-btn" lay-filter="submitAdmin" lay-submit>确认修改</button> </div> </form> </div> <div class="layui-col-md4"> <div id="sticky-detail-sidebar-sq"> <dl class="fly-panel fly-list-one"> <dt class="fly-panel-title">相关帖子</dt> <dd> <a href="/p/39732"><property name="cronExpression" value="00 00 08 * * ?" />这个是</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39731">如下问题原因 09-Jan-2025 12:58:12.387 INFO [RuleResult-3-thread-2]</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39730">tomcat的catalina.2025-01-04.log 这个日志文件如何定义生成的每天都会生成一个新的码</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39729">我用的tomcat，我的应用有一段时间卡住，过了一段时间又恢复正常，而且这段时间日志也没有是怎么回事</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39728">你的信息到哪一天</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39727">oracle 查询24年每个月月底最后一天</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39726">如何查看linux开放端口</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39725">这个错误的原因 root@mail:/usr/local/bluesky/project/xinzhi-ai-serve</a> <span><i class="iconfont icon-pinglun1"></i> <span>0</span></span> </dd> <dd> <a href="/p/39724">这里的Id是什么意思 Id: 1657286 SET timestamp=1735387923; 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