更多“诺贝尔物理学奖得主杨振宁教授曾说，20世纪20年代物理学“遍”相关的问题
因实质要件欠缺而无效的出票行为主要包括______等的出票行为。
A．无行为能力人
B．限制行为能力人
C．伪造票据签章
D．变造记载事项
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中国区营运资产安全规则执行程序（第1版）要求，根据国标《电力安全工作规程发电厂和变电站电气部分》中关于安全距离的要求，工作人员身体任何部分或受其本人控制的任何物件，与最接近的外露高压带电导体之间，10kV及以下必须维持安全距离（）。
A.0.70m
B.0.35m
C.1.00m
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如果在发动机起动前，某系统灯显示一个不正常情况，在无备件可以更换的情况下，应如何处理：（）.
A . A、放弃飞行，直到备件运到并更换后
B . B、更换飞机
C . C、请示公司是否放行
D . D、确认此种情形是否影响放行和需要维护或是否符合最低设备清单（MEL）
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戴镜出现眼痛，流泪，怎处理？（）
A.立即停戴，到院复查。
B.无所谓，继续戴镜。
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女，24岁。四肢麻木、无力伴吞咽、发音困难12小时。排尿无困难。查体：四肢呈弛缓性瘫痪，四肢腱反射消失。腰穿脑脊液压力和化验均正常。肌酶正常。诊断为（）
A . A.急性脊髓炎
B . 多发性肌炎
C . 格林-巴利综合征
D . 周期性麻痹
E . 脊髓灰质炎
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()设计器的作用是显示数据库中包含的全部表、视图和关系。
A.表
B.数据库
C.查询和视图
D.表单
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下面不属于本地用户组密码安全策略的内容是（）。
A. 密码必须符合复杂性要求B. B.设定密码长度最小值C. C.设定用户不能更改密码D. D.强制密码历史
A. 密码必须符合复杂性要求
B. B.设定密码长度最小值
C. C.设定用户不能更改密码
D. D.强制密码历史
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如果齐次线性方程组有非零解，
k应取什么值？
\left\{\begin{array}{l} kx+y+z=0\\ x+ky-z=0\\ 2x-y+z=0\end{array}\right.
A . 100mLB . 200mLC . 150mLD . 250mLE . 400mL
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Scholars and students have always been great travelers. The official case for "academic mobility" is now often stated in impressive terms as a fundamental necessity for economic and social progress in the world, and debated in the corridors of Europe; but it is certainly nothing new. Serious students were always ready to go abroad in search of the most stimulating teachers and the most famous academies; in search of the purest philosophy, the most effective medicine, the likeliest road to gold. Mobility of this kind meant also mobility of ideas, their transference across frontiers, and their simultaneous impact upon many groups of people. The point of learning is to share it, whether with students or with colleagues. One presumes that only eccentrics have no interest in being credited with a startling discovery, or a new technique. It must also have bean reassuring to know that other people in other parts of the world were about to make the same discovery or were thinking along the same lines, and that one was not quite alone, confronted by inquisition, ridicule or neglect. In the twentieth century, and particularly in the last 20 years, the old footpaths of the wandering scholars have become vast highways. The vehicle which has made this possible has of course been the aeroplane, making contact between scholars even in the most distant places immediately feasible, and providing for the very rapid transmission of knowledge. Apart from the vehicle itself, it is fairly easy to identify the main factors which have brought about the recent explosion in academic movement. Some of these are purely quantitative and require no further mention: there are far more centers of learning, and a far greater number of scholars and students. In addition one must recognize the very considerable multiplication of disciplines, particularly in the sciences, which by widening the total area of advanced studies has produced an enormous number of specialists whose particular interests are precisely defined. These people would work in some isolation if they were not able to keep in touch with similar isolated groups in other countries. Frequently these specializations lay in areas where very rapid developments are taking place, and also where the research needed for developments is extremely costly and takes a long time. It is precisely in these areas that the advantages of collaboration and sharing of expertise appear most evident. Associated with this is the growth of specialist periodicals, which enable scholars to become aware of what is happening in different centers of research and to meet each other in conferences and symposia(座谈会). From these meetings come the personal relationships which are at the bottom of almost all formalized schemes of cooperation, and provide them with their most satisfactory stimulus.
A．salaries and conditions are better abroadB．standards are higher at foreign universitiesC．they are eager for new knowledgeD．their governments encourage them to travel
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福建地处东南沿海，自晋唐以来，南渐的中原文化和闽越文化相融衍生，不同区域丰富的自然和人文资源滋养出闽南文化、客家文化、妈祖文化、闽都文化等区域文化，它们各具特色、异彩纷呈。这从一个侧面体现了（）
A.人们需要雅俗共赏的大众文化
B.福建传统文化是中华文化的精华
C.中华文化源远流长、博大精深
D.我国各民族文化各具独特的个性
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某空调水系统的某段管道如图所示。管道内径为200mm，A、B点之间的管长为10m，管道的摩擦系数为0.02。管道上阀门的局部阻力系数（以流速计算）为2，水管弯头的局部阻力系数（以流速计算）为0.7
A．2.53kPa
B．3.41kPa
C．3.79kPa
D．4.67kPa
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A公司与B公司签订丁购买一批白糖的合同。就在B公司将白糖交付A公司时，被工商行政管理部门查出该批“白糖”实际上是毒品的原料，随予以查封。根据我国《合同法》关于合同效力的规定，该买卖合属于（ ）
A．有效合同
B．可撤销的合同
C．放力待定的合同
D．无效合同
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下列病名中以形态命名的是（）
A.蛇头疔
B.翻花疮
C.烂疔
D.发
E.流注
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