更多“轴流泵广泛采用改变叶片（）来提高其工作效率。”相关的问题
哪一项可以唤醒民族成员的身份意识，增进民族成员之间的情感互动？（）
A . A、民族情感
B . B、民族心理
C . C、民族性格
D . D、民族观念
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若MyClass为一个类，执行“MyClass a[4] , *p[5];”语句时会自动调用该类的构造函数的次数是________次。
芽孢的结构一般可分为（）、芽孢衣、皮层和核心四部分。
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已知则为______。 A． B． C． D．
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轴向磁化检验近表面的缺陷时，使用直流电代替交流电的原因是（）。
A.直流电可提高磁粉的流动性 B.直流电易于达到磁场饱和 C.交流电的趋肤效应使可发现缺陷的深度变小 D.对环境条件无要求
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患者女。心脏听诊可闻及S1分裂，该患者可能是以下疾病，除了（）。
A . 右心衰竭
B . 主动脉瓣狭窄
C . 右束支传导阻滞
D . 心房黏液瘤
E . 二尖瓣狭窄
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尿路造影（ ）。
A. B. C. D. E.
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政府债券是政府作为发行人而发行的债券。它的利息享受免税待遇。
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学习文献检索的重要目的是以最少的时间与精力来获取自己所要的信息。（）
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眶下孔在眶下缘中点下方约多少厘米处( )
A．1cm
B．0.5cm
C．1.5cm
D．0.8cm
E．以上都不是
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Point 1 We are all beginning another great journey. We aren’t sure where this one will lead us either, but again I am certain this revolution will touch even more lives and take us all farther. The major changes coming will be in the way people communicate with each other. The benefits and problems arising from this upcoming communications revolution will be much greater than those brought about by the PC revolution. Point 2 There is never a reliable map for unexplored territory, but we can learn important lessons from the creation and evolution of the $120-billion personal-computer industry. The PC--its evolving hardware, business applications, on-line systems, Internet connections, electronic mail, multimedia titles, authoring tools, and game--the foundation for the next revolution. Point 3 This next journey, to the so-called information highway, is the topic of endless newspaper end magazine articles, television and radio broadcasts conferences and widespread speculation. There has been an unbelievable amount of interest in this subject during the last few years, both inside and outside the computer industry. The interest is not confined only to developed countries, and it goes well beyond the large numbers of personal-computer users. Point 4 Thousands of informed and uninformed people are now thinking publicly about the information highway. The amount of misunderstanding about the technology and its possible dangers surprises me. Some people think the highway is simply today’s Internet or the delivery of 500 simultaneous chamels of television. Others hope or fear it will create computers as smart as human beings. Those developments will come, but they are not the highway. Point 5 The revolution in communications is just beginning. It will take place over several decades, and will be drives by new "applications" --new tools, often meeting currently unforeseen needs. During the next few years, major decisions will have to be made. It is crucial that a broad set of people--not just technologists or those who happen to be in the computer industry--participate in the debate about how this technology should be shaped, If that can be done, the highway will serve the purpose users want. Then it will gain broad acceptance and become a reality. Now match each of the points (16 to 20) to the appropriate statement. Note: there are two extra statements.A. This upcoming communications revolution has been widely paid attention to.B. We learn from the mistakes of others.C. We are beginning to do something which uncertain, yet outstanding.D. People of all walks of life should be active in this revolution.E. We should be good drawing the experience of others.F. No one would talk much in society if he only knew how often he misunderstanding.G. The most regrettable thing is misunderstanding
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系统研究作业的基本过程和内容可以归纳为( )。
A．问题发现
B．问题诊断
C．目标确认
D．问题定义
E．目标施行
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大额提现规定对一次性提取现金20万元（含）以上，应请取款人必须提前2天以电话等方式预约，以便信用社准备现金。
A . 正确
B . 错误
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下列关于复合肥的施用说法正确的是（）
A.经济植物以提高产量为主，可施用氮磷复混肥料
B.含硝态氮的复混肥料宜施在水田和多雨地区
C.作基肥或种肥效果较好
D.养分齐全，单独施用
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