更多“设置分水缸的作用是（)流量。”相关的问题
78. 支链淀粉中葡萄糖残基之间的苷键为( )A.
a-1,4-苷键B.
\beta -1 ,4 -苷键C.
a-1,4-苷键和α-1，6-苷键D. β-1,4-苷键和 β-1,6-苷键
我国正常成年男性的血量约占体重()
A．10％
B．9％
C．8％
D．7％
E．6％
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电流的通路叫做电路，电路“三要素”是（）。
A . A、电源、负载和连接它们之间构成回路的导线
B . B、电阻、电容和三极管
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南戏的声腔有：A.海盐腔B.余姚腔C.昆山腔D.弋阳腔
南戏的声腔有： A.海盐腔 B.余姚腔 C.昆山腔 D.弋阳腔
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为了安全的使用建行网上银行，客户在使用网上银行时应注意以下几个方面：（）
A、直接访问http：//www、ccb、com
B、设臵安全的网上银行密码，并定期更改
C、不要向任何人透露密码
D、尽量不要在他人的计算机使用网上银行
E、保证计算机安全
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如救生服必须连同救生衣一起穿着救生衣应穿在救生服的（）。
A.里面 B.里面和外面都可以 C.外面 D.里外都不可以
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在国家赔偿法律关系中，有一方必然是国家。
A . 正确
B . 错误
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如图，在直角三角形ABC中，AC=4，BC=3，DE//BC，已知梯形BCDE的面积为3，则DE=（）。
A.
B.
C.
D.
E.
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下列不符合急性风湿性关节炎（）
A.常侵犯大关节、呈游走性、对称性
B.小关节偶尔可同时受累
C.炎症消退后活动正常
D.Ｘ线摄片见关节间隙变窄、周围软组织肿胀
E.局部出现红、肿、热、痛
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What kinds of people often give drugs to their children Where in the world do people take drug before going to work The answers are simple—ordinary people, just about (26) . And the drug (27) question is caffeine. Scientists estimate that over 70% of the world’s population takes caffeine daily. (28) drink it in tea and coffee. Children drink in tin Coca Cola and (29) soft drinks. It is also found in chocolate. (30) , most people in the most places at any time are under the (31) of the drug. There have been many scientific investigations (32) the exact effects of caffeine. Most people agree that it (33) the nervous system and helps the body make efficient use of energy. This is why many people (34) Asia drink tea with food and why westerners often end their meals (35) a cup of coffee. Because the effect of caffeine is so (36) , there have been (37) attempts to stop people using it. A U. S. religious group which (38) the use of caffeine is generally regarded as eccentric (反常的). But because nearly everybody takes it, the total effect of caffeine (39) people is huge. Caffeine is the drug that changed the world. Both tea and coffee were introduced to the West around 300 years ago. The effect of these new drinks was felt (40) . In New York, coffee houses were (41) with people making plans, (42) business and doing deals. And the deals done in the coffee houses were partly responsible (43) a rapid increase in American trade. History was moving (44) that direction anyway. But the arrival of coffee (45) everything up.
A．everythingB．everyoneC．everydayD．everywhere
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转速负反馈有静差调速系统的特点有（）。
A.根据速度偏差来进行转速调节
B.调节器实质为比例放大器
C.开环放大倍数足够大时，可使静差为零
D.适当提高系统的开环放大倍数，可减小静差，扩大调速范围
E.根据速度偏差的积累来进行转速调节
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基本尺寸是指在图纸上有设计给定的尺寸。它是根据零件的（）等所确定的数值。
A.强度 B.刚度 C.结构 D.工艺要求
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