更多“单相桥式全控整流中，感性负载中电感很大，当单相桥式全控桥的触”相关的问题
在其他条件一定的情况下，（）时对应的平飞阻力最小。
A.升力系数最大
B.阻力系数最小
C.升阻比最小
D.升阻比最大
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其中D是由圆周x2+y2≤2x所围成的闭区域，选用适当的坐标计算积分。
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水发就是用（）温度的清水、浑水（如米汤）浸涨干货原料的方法。
A.不同
B.热水
C.冷水
D.碱水
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40m内隐斜视7△，聚散力测试结果为：BI：11/15/8，BO：12/18/8，采用Sheard准则进行缓解矫正，棱镜参考值为 BO1△。
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在PowerPoint2013 的一大特色就是可以使演示文稿中的幻灯片具有一致的外观,一般采用下面方法来实现( )
A. 母版的使用 B. 主题的使用 C. 幻灯片背景的设置 D. 以上方法都是
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肠梗阻病人，胃肠减压流出血性液体应警惕（）。
A.胃出血 B.食管出血 C.咽部出血 D.鼻出血 E.绞窄性肠梗阻
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TACS系统中的调制方式与调制信号是（)。
A．GMSK调制方式、64Kb/S话音编码信号
B．FM调制方式、64Kb/S话音编码信号
C．MSK调制方式、64Kb/S话音编码信号
D．FM调制方式、64Kb/S话音编码经D/A转换后的信号
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The Aleuts, residing on several islands of the Aleutian Chain, the Pribilof Islands, and the Alaskan peninsula have possessed a written language since 1825, when the Russian missionary Ivan Venation selected appropriate characters of the Cyrillic alphabet to represent Aleut speech sounds, recorded the main body of Aleut vocabulary and formulated grammatical rules. The Czarist Russian conquest of the proud, independent sea hunters was so devastatingly thorough that tribal traditions, even tribal memories, were almost obliterated. The slaughter of the majority of an adult generation was sufficient to destroy the continuity of tribal knowledge, which was dependent upon oral transmission. As a consequence, the Aleuts developed a fanatical devotion to their language as their only cultural heritage. The Russian occupation placed a heavy linguistic burden on the Aleuts. Not only were they compelled to learn Russian to converse with their overseers and governors, but they had to learn Old Slavonic to take an active part in church services as well as to master the skill of reading and writing their own tongue. In 1867, when the United States purchased Alaska, the Aleuts were unable to break sharply with their immediate past and substitute English for any one of their three languages. To communicants of the Russian Orthodox Church a knowledge of Slavonic remained vital as did Russian, the language in which one conversed with the clergy. The Aleuts came to regard English education as a device to wean them from their religious faith. The introduction of compulsory English schooling caused a minor renascence of Russian culture as the Aleut patents sought to counteract the influence of the schoolroom. The harsh life of the Russian colonial rule began to appear more happy and beautiful in retrospect. Regulations forbidding instruction in any language other than English increased its unpopularity. The superficial alphabetical resemblance of Russian and Aleut linked the two tongues so closely that every restriction against teaching Russian was interpreted as an attempt to eradicate the Aleut tongue. From the wording of ninny regulations, it appears that American administrators often had not the slightest idea that the Aleuts were clandestinely reading and writing their own tongue or even had a written language of their own. To too many officials, anything in Cyrillic letters was Russian and something to be stamped out. Bitterness bred by abuses and the exploitations the Aleuts suffered from predatory American traders and adventurers kept alive the Aleut resentment against the language spoken by Americans. Gradually despite the failure to emancipate the Aleuts from a sterile past by relating the Aleut and English languages more closely, the passage of years has assuaged the bitter misunderstandings and caused an orientation, away from Russian toward English as their second language, but Aleut continues to be the language that molds their thought and expression.The author is primarily concerned with describing ______.A．United States government attempts to persuade the Aleuts to use English as a second languageB．Russian and United States treatment of Alaskan inhabitants both before and after 1867C．how the Czarist Russian occupation of Alaska created a written language for the AleutsD．the Aleuts' loyalty to their language and American failure to understand it
A.B.C.D.E.TheF.A．UnitedG.RussianH.howI.the
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已知8位机器码10110100，它是补码时，表示的十进制真值是（）。
A . 52
B . 180
C . -76
D . -52
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会阴侧斜切开术自会阴后联合线向左或右后旁开（）切开。
A.45°
B.50°
C.60°
D.55°
E.40°
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饭店客房的（），即先介绍所提供的服务设施与服务项目，特色等，最后提出房价。
A.“冲击式"报价
B."夹心式"报价
C.利益引诱法
D."鱼尾式"报价
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社会工作通过服务而间接地起到社会管理的功能。（)
是
否
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电子商务最早起源于 A.20 世纪 60 年代的美国 B.20 世纪 90 年代的美国。 C.20 世纪 60 年代的英国 D.20 世纪 60 年代的中国
A. .20 世纪 60 年代的美国 B. 20 世纪 90 年代的美国。 C. 20 世纪 60 年代的英国 D. 20 世纪 60 年代的中国
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生产经营单位对重大危险源应当（）并进行定期检测、评估、监控，指定应急预案，告知从业人员和相关人员在紧急情况下应当采取的应急措施。
A、明显的安全警告标记
B、建立防护措施
C、登记建档
D、上报上级主管部门
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参考答案
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