更多“新生儿—成人—老人，脑电的频率变化分别为（）。”相关的问题
早年间海报是用于下列选项中什么活动的活动招贴，错误的是（）
A.餐饮外卖等
B.出行打车
C.市场销售
D.戏剧、电影等演出
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申请文件数字证书或关联银行获得授权码必须在（）天内启用，否则此次申请将作废，如客户想再次申请，需到银行柜台重新办理。
A.5天 B.15天 C.30天 D.60天
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1. 长期借款筹资与长期债券筹资相比,其特点是( )
A. 利息能节税 B. 筹资费用高 C. 债务利息高 D. 筹资弹性大
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区域指挥组织按照突发事件指挥系统的基本原则运行。其中，（）的职责包括解决它们彼此间的矛盾、设立突发事件管理目标、重要资源使用的战略抉择，以及负责协调联邦、州、地方、种族和参加的私人组织之间的关系。
A.区域指挥官
B.区域指挥后勤主管
C.区域指挥规划主管
D.区域指挥支持岗位
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甲工业企业为增值税一般纳税人,2016年10月9日购入材料一批,取得增值税专用发票上注明的价款为21200元,增值税税额为3604元。另支付包装物押金1500元。材料入库前的挑选整理费为200元,材料已验收入库。则该企业取得材料的入账价值为()元
A. 20200 B. 21400 C. 23804 D. 25004
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Specialization can be seen as a response to the problem of an increasing accumulation of scientific knowledge. By splitting up the subject matter into smaller units, one man could continue to handle the information and use it as the basis for further research. But specialization was only one of a series of related developments in science affecting the process of communication. Another was the growing professionalization of scientific activity. No clear-cut distinction can be drawn between professionals and amateurs in science:exceptions can be found to any rule. Nevertheless, the word ’’ amateur’’ does carry a connotation that the person concerned is not fully integrated into the scientific community and, in particular, may not fully share its values. The growth of specialization in the nineteenth century, with its consequent requirement of a longer, more complex training, implied greater problems for amateur participation in science. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United Kingdom. A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper. Thus, in the nineteenth century, local geological studies represented worthwhile research in their own fight; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate, and reflect on, the wider geological picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of referring, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way. Although the process of professionalization and specialization was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however, the nineteenth century must be reckoned as the crucial period for this change in the structure of science.
A． the development in communicationB． the growth of professionalizationC．the expansion of scientific knowledgeD． the splitting up of academic societies
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《房屋建筑与装饰工程工程量计算规范》（GB50854－2013）规定，计算斜(坡)屋面外墙墙高时，有屋架且室内
《房屋建筑与装饰工程工程量计算规范》（GB50854-2013）规定，计算斜(坡)屋面外墙墙高时，有屋架且室内外均有天棚者（ ） A.算至屋面板底 B.算至屋架下弦底另加20cm C.算至屋架下弦底另加30cm D.按实砌高度计算
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沼气灯沼气虽多，但灯光发红无白光的原因是什么？怎样排除？
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长颈漏斗用于定量分析，过滤沉淀；短颈漏斗用作一般过滤。（）
A . 正确
B . 错误
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在测四冲程柴油机气阀间隙时，保证各缸测完的最小盘车角度是（）。
A . A．720°曲轴转角
B . B．360°曲轴转角
C . C．360°～720°曲轴转角
D . D．大于720°曲轴转角
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下面哪一图是二方连续纹样（）。
A.A
B.B
C.C
D.D
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在第一、二批40个示范片（含珠三角6市）已竣工的项目中，粤东西北地区约占了（ ）
A . 47%
B . 48%
C . 49%
D . 50%
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