更多“在学校里,教师可以讲授不同的课程,同一课程也可由不同教师讲授”相关的问题
一简谐振动曲线如图所示.则振动周期是
A . 2.62 s.B . 2.40 s.C . 2.20 s.D . 2.00 s.
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下面诗句的出处和作者对应错误的一项是（ ）。 A．边庭流血成海水，武皇开边意未已—《兵车行》—杜甫 B．飞湍瀑流争喧豗，砯崖转石万壑雷—《蜀道难》—李白 C．春江花朝秋月夜，往往取酒还独倾《琵琶行》—白居易 D．劝君更尽一杯酒，西出阳关无故人—《山中送别》—王维
A.边庭流血成海水，武皇开边意未已—《兵车行》—杜甫
B.飞湍瀑流争喧豗，砯崖转石万壑雷—《蜀道难》—李白
C.春江花朝秋月夜，往往取酒还独倾《琵琶行》—白居易
D.劝君更尽一杯酒，西出阳关无故人—《山中送别》—王维
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设典型二阶系统的开环传递函数为【图片】，引入测速反馈控制和比例微分控制，系统D和系统T的开环传递函数分别为【图片】设两系统均为欠阻尼系统，则 。
A. B. 系统D 的上升速率大于系统TC. 系统D 和系统T 的超调量相等D. 设计过程是调节K 增大 ，再调节 或 使 达到要求
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漂白粉消毒法即是餐具放入0.2-0.5%的漂白粉滴液中经5-10分钟浸泡即可。
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在经济业务发生或完成时取得或填制的，记载经济业务的发生或完成情况，明确经济责任的会计凭证是（）。
A . 原始凭证
B . 记账凭证
C . 收款凭证
D . 转账凭证
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财政是国家治理的基础和重要支柱，管理会计的职能、理念和方法对财政管理具有借鉴意义。
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基本发酵时间少，面包表皮（)。
A.厚B.色深C.色淡D.起花
B.色深C.色淡D.起花
C.色淡D.起花
D.起花
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境外货运代理的主要特点是（）
A.在中国国内一些港口设有办事处，但没有具体业务经营权，必须通过“一级”货代订舱、报关
B.通常由买方指定，卖方则处于被动地位
C.临时租用办公室和雇佣人员，开业、停业灵活方便，资信难以确定。虽然政府有关部门对他们进行注册登记，但实际上对其活动难以监控
D.只能提供货代提单，而真正的物权凭证是船公司签发的提单，如果货代与客户合伙进行诈骗，或为了揽货而无单放货给客户，将导致卖方货款两空的风险
E.内部管理规范，重视为国外买方服务，也注重于国内卖方的配合
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图示用两绳悬挂的质量m处于静止。试问： 1.两绳中的张力各等于多少？ 2.若将绳A剪断，则绳B在该瞬时的张力又等于多少？
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2011年1月份，某市烟草专卖局稽查员小胡接到本市市民多次举报电话11次，称均收到手机短信显示本地供应低价名优卷烟，并提供了卷烟样品、价格所在网址。根据这条线索进行侦破，成功破获胡某等5人利用互联网销...此案件线索属于通过社会及外部环境获取的案件线索的哪一种？
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公司借款需求与借款目的区别在于：借款需求强调借款发生的原因，而借款目的强调借款的用途。( )
A . 正确
B . 错误
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车载式线路检查仪检查线路时，车轴带动光电编码器同步转动，可计算出车轮转动周数和le列车运行（）。
A.加速度B.振动C.里程D.速度
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（）防风装置，是指在电动装卸机械停止运行或忽然断电的情况下，防风装置能自动工作。
A.自动作用
B.半自动作用
C.人为作用
D.手动作用
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关于视频质量分，如果达标项没有完成，可以完成加分项加分。
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The predictability of our mortality rates is something that has long puzzled social scientists. After all, there is no natural reason why 2,500 people should accidentally shoot themselves each year or why 7,000 should drown or 55,000 die in their cars. No one establishes a quota for each type of death. It just happens that they follow a consistent pattern year after year. A few years ago a Canadian psychologist named Gerald Wilde became interested in this phenomenon. He noticed that mortality rates for violent and accidental deaths throughout the western world have remained oddly static throughout the whole of the century, despite all the technological advances and increases in safety standards that have happened in that time. Wilde developed an intriguing theory called "risk homeostasis". According to this theory, people instinctively live with a certain level of risk. When something is made safer, people will get around the measure in some way to reassert the original level of danger. If, for instance, they are required to wear seat belts, they will feel safer and thus will drive a little faster and a little more recklessly, thereby statistically canceling out the benefits that the seat belt confers. Other studies have shown that where an intersection is made safer, the accident rate invariably falls there but rises to a compensating level elsewhere along the same stretch of road. It appears, then, that we have an innate need for danger. In all events, it is becoming clearer and clearer to scientists that the factors influencing our lifespan are far more subtle and complex than had been previously thought. It now appears that if you wish to live a long life, it isn’t simply a matter of adhering to certain precautions..., eating the right foods, not smoking, driving with care. You must also have the right attitude. Scientists at the Duke University Medical Center made a 15-year study of 500 persons personalities and found, somewhat to their surprise, that people with a suspicious or mistrustful nature die prematurely far more often than people with a sunny disposition. Looking on the bright side, it seems, can add years to your life span.
A.Showing adequate trust instead of suspicion of others.B.Eating the food low in fat and driving with great care.C.Cultivating an optimistic personality and never losing heart.D.Looking on the bright side and developing a balanced level of risk.
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