更多“指出电路中引入了什么类型的反馈。”相关的问题
用拖车拖运物件时，物件的重心应放在拖板（）位置。
A . A、中心
B . B、前方
C . C、后方
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Which of the following statements about bond and stock market indexes is FALSE
A. Bond market indexes have been in existence virtually as long as the major stock indexes such as the Dow Jones Industrial Average (DJIA).
B. A small number of very large firms can dominate a value-weighted index.
C. When a company splits its stock, it loses weight in a price-weighted index.
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NAVTEX岸台每次播发时间最多为（）
A . A、4h
B . B、10min
C . C、4min
D . D、5min
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Passage Three Questions 11 to 15 are based on the following passage: Until the 1980s, the American homeless population comprised mainly older males. Today, homelessness strikes much younger part of society. In fact, a 25-city survey by the U.S. Conference of Mayors in 1987 found that families with children make up the fastest growing part of the homeless population. Many homeless children gather in inner cities; this transient( 变化无常的 ) and frequently frightened student population creates additional problems — both legal and educational — for already overburdened urban school administrators and teachers. Estimates of the number of homeless Americans range from 350,000 to three million. Likewise, estimates of the number of homeless school children vary radically. A U.S. Department of Education report, based on state estimates, states that there are 220,000 homeless school-age children, about a third of whom do not attend school on a regular basis, b ut the National Coalition for the Homeless estimates that there are at least two times as many homeless children, and that less than half of them attend school regularly. One part of the homeless population that is particularly difficult to count consists of the “throwaway” youths who have been cast of their homes. The Elementary School Center in New York City estimates that there are 1.5 million of them, many of whom are not counted as children because they do not stay in family shelters and tend to live by themselves on the streets. Federal law, the Stewart B. McKinney Homeless Assistance Act of 1987, includes a section that addresses the educational needs of homeless children. The educational provisions of the McKinney Act are based on the belief that all homeless children have the right to a free, appropriate education. 11. It is implied in the first paragraph that ________ .
A. the writer himself is homeless, even in his eightiesB. many older homeless residents are going on strike in 25 citiesC. there is a serious shortage of academic facilitiesD. homeless children are denied the opportunity of receiving free education
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How she wishes she ______more attention to her lessons when she was at school!
A．have paid
B．paid
C．had paid
D．has paid
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过冷奥氏体在碳原子能够扩散而铁原子不能扩散的情况下,将转变为( )类型组织。
A. 珠光体B. 贝氏体C. 马氏体D. 莱氏体
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A . 毛细管法B . 显微熔点测定法C . 蒸馏法D . 分馏法
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人际交往的空间距离主要分为______。
A．零距离
B．亲密距离
C．个人距离
D．社会距离
E．公众距离
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男性，47岁，头痛发病，病程4个月，入院前出现左侧肢体无力和呕吐。入院检查，意识清，眼底视乳头水肿，左上下肢肌力Ⅳ级，腱反射活跃，病理征（+）。脑CT检查示：右颞顶部低密度灶，其外后方可见一略高密度结节，右侧脑室体受压，中线结构右移。增强示结节均匀强化，整个病灶呈类圆形，边界清晰，周围无水肿。结合CT检查，患者较接近下面哪项诊断（）。
A . A.星形细胞瘤
B . 脑膜瘤
C . 脑脓肿
D . 脑出血
E . 脑梗死
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职业化的目的是使员工在知识、（）、观念、思维、态度、心理上符合职业规范和标准。
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根据《关于进一步做好全*省货车非法改装和超限超载治理工作的实施方案》要求，加强对货车（）的综合治理，进一步提升公路网整体安全保障水平。
A.生产
B.改装
C.销售
D.道路货物运输
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关于渗出液的叙述，不正确的是A.不易凝固B.浑浊C.可含大量细菌D.可呈
关于渗出液的叙述，不正确的是 A.不易凝固 B.浑浊 C.可含大量细菌 D.可呈黄色脓样 E.可形成凝块
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正义观的实践价值就体现在（）。
A.正义是社会的“平衡器”
B.正义是人的行为的“校正器”
C.正义是社会的“发展器”
D.正义是社会发展的“推进器”
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