更多“当共析成分的奥氏体在冷却发生珠光体转变时,温度越低,其转变产”相关的问题
关于无限大介质中的声辐射，下面说法正确的是（）
A.辐射声场满足声源表面边界条件
B.辐射声场满足无穷远边界条件
C.辐射声场满足波动方程
D.声源的振动在周围介质中激发声波，称为声辐射
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道路交通标志的视觉性要素不包括（）。
A.形状
B.文字
C.颜色
D.图符
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ETC注销退费的金额是按照（）显示的金额进行退费。
A.注销流水单B.退费流水单C.圈存截图D.卡号状态截图
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如下图所示，某教师欲建立一个家庭无线局域网，并要求将无线局域网连接到校园网上，此时家庭无线局域网应使用的无线设备是______。
A．无线网卡
B．无线接入点
C．无线网桥
D．无线路由器
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调压站过滤/分离器可以分离出天然气中的（）。
A、固体小颗粒
B、液体小液滴
C、固体小颗粒和液体小液滴
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下列关于专业贷款的风险加权资产计量的说法中，正确的有（）。
A.采用内部评级法，需要分别估计其违约概率、违约损失率等风险参数，进而按照公司风险暴露的资本计算公式计算风险加权资产
B.对于不能满足自行估计违约概率要求的银行，要对专业贷款采用一维评级，同时考虑债务人的特征和债项特征以及两者之间的相关性，直接反映预期损失
C.采用监管映射法时，监管类别"优"的风险权重为70%
D.采用监管映射法时，监管类别"违约"的风险权重为100%
E.采用监管映射法，首先应通过考虑监管给定的风险因素，得到专业贷款的评级，其次根据每一个监管类别对应的特定风险权重，计算风险加权资产
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当机组启动升负荷时，负荷（）MW时，同时主再热蒸汽温度大于（）℃ ，中联门后疏水门关闭；当给水泵流量大于（）m3/h时，检查给水泵再循环门自动关闭，否则手动关闭。
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大脑具有（ ）。
A.学习功能 B.记忆功能 C.思维功能 D.控制功能 E.消化吸收功能
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招标人组织工程建设项目投标资格审查，下列做法正确的有______。
A.采用资格预审方法的，按资格预审文件规定的要素和标准对申请人进行综合评分，按约定的数量以及评分结果，由高分到低分确定资格预审的申请人 B.采用资格后审方法的，由评标委员会按招标文件规定的要素和标准对投标人资格进行合格性评审 C.采用随机抽取的方法的，从符合专业资质等级的投标申请人中确定潜在投标人 D.采用资格后审有限数量制办法的，按招标文件规定要素和标准对投标人资格进行量化评审 E.采用资格预审方法的，在评标阶段一律不需要评审投标人资格
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气体的质量热容c、体积热容cV和摩尔热容Cm相互换算的关系式为（）。
A、c-cV=Cm
B、cV=cρ=Cm/Vm
C、c=Cm+cV
D、cV=cρ=CmVm
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以下程序结果正确的是? main() { int a=2,b=4,c=6,x,y; x=(a+b),(b+c); y=(a+b,b+c); printf("x=%d,y=%d",x,y); }
A. x=10,x=6 B. x=6,y=10 C. x=16,y=16 D. 6 10
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能发生硫色素特征反应的药物是（）
A.维生素A
B.维生素B
C.维生素C
D.维生素
E.维生素AD
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Undoubtedly, Internet technology will change the way we live, work, communicate and do business. But beware of those who proclaim(声明)this to be a New Era of profitability. As in the so-called New Eras of the past brought on by earlier technological breakthroughs -- this one carries the seeds of its own destruction. The phenomenal growth of Internet businesses is already fueling a Klondike-style. gold rush, with far too many diggers looking for far too little gold. Economics teaches us that it is hard to become an upstart with a basically free commodity. Think of ice in the Arctic,sand in the desert, seawater in the ocean or, for that matter, the seemingly (表面上)unlimited 'hot air' on the Net.In the 20th century, the proliferation of cars, radios, movies, televisions, mass retailers and computers all inspired a sense that we had begun a New Era. Each breakthrough promised new fiches and unprecedented prosperity for the innovators. But in the long run, they always failed to deliver to investors the expected rewards.Why the letdowns? In part because every great innovator invariably attracted great imitators,who competed with the original and eventually depressed his 'excessive' profit margin by commoditizing the invention. Furthermore, great inventions have always been followed by greater innovations (创新), which, through the process known as creative destruction, render the previous new technology obsolete. And when inventions become vital to the economy, they are frequently brought under the control of governments via regulation, nationalization and, in extreme cases, expropriation.Take the Erie Canal, which was completed in 1825. Its success led to the great American canal boom of the 1830s. It ended just a few years later in a tremendous failure, as most of the other canals failed to make money. The Erie, too, began to suffer from competition, first from railroads and, eventually, from trucks. In the end, the railroad industry -- which helped create an unprecedented industrial boom -- proved to be disastrous for most investors. By 1895, most U. S. railroads had to be restructured.Now familiar technologies like cars, radios, cash registers and mainframe. computers were all at some point new and revolutionary. But the spread of the technologies led inevitably to the demise of their creators' 'excessive' profits, as each became just another commodity, Don't think for a minute that the Internet will be any different. 第 22 题 It is implied in the passage that_____________A．the growth of the Internet business is too fastB．the spread of a new invention can make people live betterC．most Internet companies are unlikely to be out of businessD．some survived Internet companies can achieve some meaningful earnings
A.InB.WhyC.TakeD.NowE.theF.theG.mostH.some
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根据体育概念的内涵和外延，我们发现，体育的本质，就是以（）为基本手段，以（）为主要目的，这是体育区别于其他社会活动的本质特点。
A、运动训练
B、健身运动
C、身体锻炼
D、增强体质
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带饰面砖的预制墙板进入施工现场后，应对饰面砖（）进行复检
A.外观质量 B.粘结强度 C.力学性能 D.各项指标
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