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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>
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<p>参考答案：<b>B</b></p> </div>
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<a href="https://app.ixiawen.com/question/27052129/dc944d4c2834491281939b21561128cb.html" class="black" target="_blank"><p>1958年，中 * * 发动了“大跃进”和人民公社化运动，是由于</p><p>①社会主义建设缺乏经验②急于求成③自然灾害④忽视了客观经济规律[ ]</p><p>A．①②③</p><p>B．②③④</p><p>C．①②④</p><p>D．①③④</p></a>
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<a href="https://app.ixiawen.com/question/39737357/ca3764ddc443d94040c6d71fb5a1fdb1.html" class="black" target="_blank"><p>骨盆入口前后径短，横径正常者，属于</p><p>A．均小骨盆</p><p>B．男性骨盆</p><p>C．畸形骨盆</p><p>D．扁平骨盆</p><p>E．漏斗骨盆</p></a>
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