问题 单项选择题

HTML文档都必须包括、、这三种元素,其文件基本架构中指明()</p><p>A.文件头开始</p><p>B.文件头区内容</p><p>C.文件开始</p><p>D.正文区开始</p> </div> <div class="line"></div> <div class="content_answer"> <span class="text_left">答案</span> </div> <div class="content content_answer_bg"> <p>参考答案:<b>B</b></p> </div> </div> </article> </main> <section> <div class="line"></div> <div class="content_border"> <div class="content_top"> <span class="text_left reb">单项选择题</span> </div> <div class="list"> <a href="https://app.ixiawen.com/question/208977/e88537b9662c659ae7091dfa26296f9e.html" class="black" target="_blank"><p>A省B市D房地产开发公司2006年通过房地产开发一级资质,同年还获得了正常利润,其商品房销售收入也达到了4600万元。2012年3月,D房地产开发公司取得了B市城市规划区内的一块住宅建设用地使用权,总投资为1亿元。为有效做好此项目的某旧办公楼拆迁,D房地产开发公司聘请B市二级资质E房地产估价有限公司对该旧办公楼进行了拆迁估价。经估价,该旧办公楼评估价为2100万元。同时经D房地产开发公司要求,E房地产估价有限公司还完成了该项目的市场分析报告。据此,请回答以下问题:<br></p><p>按照经济学原理,D房地产开发公司2006年的经济成本已达到了( )万元。</p><p>A.2300</p><p>B.4600</p><p>C.6900</p><p>D.9200</p></a> </div> <div class="content_bottom"> <span class="text_right"><a href="https://app.ixiawen.com/question/208977/e88537b9662c659ae7091dfa26296f9e.html" class="blue" target="_blank">查看答案</a></span> </div> </div> <div class="line"></div> <div class="content_border"> <div class="content_top"> <span class="text_left reb">选择题</span> </div> <div class="list"> <a href="https://app.ixiawen.com/question/20658601/d86befd1dc1d737d0a1a9a4177862401.html" class="black" target="_blank"><p>22.Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.</p><p>A.that</p><p>B.why</p><p>C.how</p><p>D.Whether</p></a> </div> <div class="content_bottom"> <span class="text_right"><a href="https://app.ixiawen.com/question/20658601/d86befd1dc1d737d0a1a9a4177862401.html" class="blue" target="_blank">查看答案</a></span> </div> </div> <div class="line"></div> </section> <footer> <div class="xieyi"> <div class="w"> <a href="https://www.ixiawen.com/about/fuwu.html" rel="nofollow" class="hui" target="_blank">服务协议</a> </div> <div class="w_center">|</div> <div class="w"> <a href="https://www.ixiawen.com/about/yinsi.html" rel="nofollow" class="hui" target="_blank">隐私权政策</a> </div> <div class="w_center">|</div> <div class="w"> <a href="https://www.ixiawen.com/" class="hui" target="_blank">APP下载</a> </div> </div> </footer> </body> </html>