更多“在不同绝缘材料的电缆线路中，脉冲波的传输速度也不同。”相关的问题
按照培训的目的，在岗培训可分为（ ）。A．转岗培训B．晋升培训 C．专业性技能培训D．以改善
按照培训的目的，在岗培训可分为（ ）。 A．转岗培训 B．晋升培训 C．专业性技能培训 D．以改善绩效为目的的培训 E．岗位资格培训
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已知293K时水的表面张力为7.28×l0-2N·m-1，汞的表面张力为4.83×l0-1N·m-1，汞-水表面张力为3.75×l0-1N·m-1，试判断水能否在汞的表面铺展。
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下列三个结论中,所有正确结论的序号是() (1)若集合A=(-∞,3],B=(-2,+∞),则A∩B=(-2,3] (2)不等式(5x-1)^2>0的解集是R (3)若p:x∈{x丨丨x丨≤5},q:x∈{x丨x^2≤25},则条件p是结论q成立的充分条件
A. (2) B. (3) C. (1)(3) D. (2)(3)
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在超市的顾客购买商品记录中统计一些商品组合的购买频率，将购买频率（商品组合）划分给不同进程，这是一种划分（）的数据并行策略。
A.输入数据
B.中间结果
C.输出数据
D.临时数据
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阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。Stress1. How often do you sit still and do absolutely nothing The usual answer these days is never, or hardly ever. As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through life, being on the go from morning till night, it is hard to slow down and unwind. But relaxation is essential for a healthy mind and body,2. Stress is a natural part of everyday life. There is no way to avoid it, since it takes many and varied forms—driving in traffic, problems with personal relationships are all different forms of stress. Stress, in fact, is not as bad as it is often reputed to be. A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can head to level performance and ill health.3. The amount of stress a person can withstand depends very much on the individual. Some people thrive on stress, and such characters are obviously prime material for managerial responsibilities. Others crumple at the sight of unusual difficulties.4. When exposed to stress, in whatever form, we react both chemically and physically. In fact we invoke (调用) the fight mechanism which in more primitive days made the difference between life or death. The crises we meet today are unlikely to be so extreme, but however minimal the stress, it involves the same response. All the energy is diverted to cope with the stress, with the result that other function, such as digestion, are neglected.5. It is when such a reaction is prolonged, through continued exposure to stress, that health becomes endangered. Such serious conditions as high blood pressure, coronary heart disease all have established links with stress. The way stress affects a person also varies with the individual. Stress in some people produces stomach disorders, while others succumb to tension headaches. Since we cannot remove stress from our lives, we need to find ways to cope with it.A. The harm of stressB. How much stress a person can withstandC. Our body’s reaction to stressD. The forms and use of stressE. How to deal with stressF. Blood pressure and stress
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WG-EDT135在对一两端使用CISCO帧中继协议的链路进行帧中继测试时，应设置的协议是（）
A.Q.933
B.ANSI1617
C.NOLMI
D.不用设置
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汉译英：“消毒检验证书；品质检验证书”，正确的翻译为：( )
A．Certificate of disinfection；Certificate Of quantity
B．Certificate of disinfection；Certificate Of quantity
C．Certificate Of fumigation；Certificate Of quantity
D．Certificate Of fumigation；Certificate Of quantity
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运行监控具有（）的特点
A、与业务操作相连B、与业务操作分离C、独立于业务操作D、附属于业务操作
B、与业务操作分离C、独立于业务操作D、附属于业务操作
C、独立于业务操作D、附属于业务操作
D、附属于业务操作
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运用于踢角球、任意球和球门球，以及长距离传球和强有力射门的摆腿方法是（）。
A.大幅度摆踢 B.中幅度摆踢 C.小幅度摆踢
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调车作业过程中 调车 信号机 __________ 显示,表示 不准越过该信号机调车; 显示 __________ ,表示 允许越过该信号机调车。
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凝胶色谱适用于分离
A. 极性大的成分B. 极性小的成分C. 分子量不同的成分D. 带有电荷的成分
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财务信息需求主体包括股东及潜在投资者、债权人、企业管理人员、政府、供应商等，这些利益主体需求不同的财务信息、但使用类似的分析方法和手段。
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1V1步兵对抗赛中，下列说法正确的有：（）①步兵对抗赛以能否在规定时间内率先击毁对方步兵机器人为判断胜负的首要条件；②步兵对抗赛中，步兵机器人可以通过击毁对方步兵机器人获得相应经验值；③若一局比赛
A.③④
B.①②③
C.①④
D.②③④
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在施工缝处继续浇筑混凝土时，已浇筑的混凝土抗压强度不应小于（）。
A.1.0N/mm2
B.1.2N/mm2
C.2.0N/mm2
D.5.0N/mm2
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