更多“软件视频会议是基于PC架构的视频通信方式。其最大的特点是( ”相关的问题
构建人类命运共同体，中国要始终做( )。
A、人类文明的引领者B、世界和平的建设者C、全球发展的贡献者D、国际秩序的维护者
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氧在钢焊缝金属中的存在形式主要是( )。
A．MnO夹杂物B．FeO夹杂物C．SiO2夹杂物D．Cr2O3夹杂物
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消除水中的硬度用（）
A.磷酸纳
B.碳酸纳
C.硝酸纳
D.硫酸钠
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爸爸带小东去滑雪，小东面对滑雪场，既想体验滑雪的乐趣，又害怕摔倒。小东面对的心理冲突属于（）。
A.双趋冲突
B.双避冲突
C.趋避冲突
D.多重趋避冲突
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识别颈椎的标志是()
A、椎体大
B、有模突孔
C、棘突细长、水平后伸
D、模突上有节面
E、有上、下关节
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字符串操作指令中，源串地址和目的串地址分别为：（）
A.CS：IP和SS：SP
B.CS：SI和DS：DI
C.SS：SI和SS：DI
D.DS：SI和ES：DI
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下列各项中,对本级各部门、各单位和下级政府的预算执行、决算实施审计监督的是( )。
A. 各级政府审计部门 B. 上一级政府财政部门 C. 各级政府财政部门 D. 各级政府
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某线性表中最常用的操作是在最后一个元素之后插入一个元素和删除第一个元素,则采用下列哪种存储方式时间效率最高
A. 顺序表 B. 单链表 C. 仅有头指针的双向链表 D. 仅有尾指针的单循环链表
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线切割技术是用线状电极，靠电火花放电对工件进行切割加工，是在电火花加工基础上又一种新发展的工艺形式。( )
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在花蕾中，每一片花瓣的一边覆盖着相邻一片的边缘，而另一边又被另一相邻一片的边缘所覆盖的排列方式为( )。 A．镊合状排列 B．复瓦状排列 C．旋转状排列 D．重叠状排列
A.镊合状排列B.复瓦状排列C.旋转状排列
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TEXT E There’s a simple idea that two of West Germany’s top car manufacturers seriously studying at the moment, both out of self interest ,but also out of concern for the environment. The concept is to develop vehicles that can run on a virtually limitless element hydrogen which when burned does not produce damaging fumes, but instead a bit of water vapour. The concept can solve two problems at once. First, it is a hedge for that day in the 21st century when hydrocarbon fuels run out, a prospect of no minor concern for the automotive industry. Beyond that, the increasingly dire warnings by environmental scientists about the "greenhouse effect" in atomosphere caused by carbon dioxide exhausts adds urgency to the quest for a fuel that is less damaging to the environment. Of course, there is a hitch to hydrogen, both carmakers admit :though the know -how to run vehicles on nature’ slightest element is already available, hydrogen is far from being cost competitive compared to hydrocarbon fuels, and further refinements hydrogen -propulsion technology will be required. But what we are discussing today is the technology of the year 2020. But after several year’s research Daimler and BMW engineers, in collaboration with other companies and research institutes in West Germany, independently have been tackling the technological and cost feasibility problems to be overcome in hydrogen fuel application. In addition to the two concerns of technology and economic feasibility, the carmakers say, there is the issue of safety. The spectacular explosion of the dirigible. Hindenburg in 1937 immediately comes to mind, and skeptics wonder what the German autobahn would look like in one of the hundred - car pileups that routinely happen every winter if all the cars and tanks loaded with hydrogen. A BMW engineer, Friedich Fickel, says that hydrogen is seen as less risky than gasoline. When leaked, hydrogen rises quickly up to the atmosphere, reducing the potential of explosion, whereas gasoline fumes linger close to the ground before dispersing. Still, both Daimler and BMW report that a considerable part of their development efforts are aimed at safe, lead - free storage of hydrogen fuel. The related question is what is the best method of storage. By now ,the tests by both carmakers have all but eliminated using hydrogen in gas form. As a gas it takes up about 14 times the space of liquid hydrogen and as much as 30 percent can be lost by leakege unless the tanks are perfectly sealed. Two other storage methods hold more promise. One is in liquid form, and the other in the form of metal hydrides. In the latter, hydrogen if mixed with a metal alloy ,a process whereby the gas molecules are stored within the metal’s molecular structure.
A．in gas formB．putting it in liquidC．preserving it in tanksD．in the form of metal hydrides
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各寿险公司对营销员考核的关键绩效指标（KPI指标)体系包括业绩、人力和产能等指标内容。其中产能考核指标有（)等。
A.活动率
B.人均保费
C.人均件数
D.件均保费
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选用《中目》（医药卫生）查找有关“肾损伤的护理”方面的文献，该课题的主题词和副主题词是（）
A.损伤 B.护理 C.肾损伤 D.损伤护理 E.肾
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图为北半球典型锋面气旋示意图，请问图中C点的风向为（）。
A．西北风
B．东南风
C．西南风
D．东北风
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魏晋南北朝时期，行政执行的最高机关是（）
A.御史台
B.尚书省
C.中书省
D.门下省
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