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【单选题】
提高感性负载的功率因数通常采用的措施是( )A.
在感性负载中并接电阻
B.
在感性负载中串接电感
C.
在感性负载的两端并接电容
D.
在感性负载的两端并接电感
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】（）是回归分析中常用的一种方法，选用历史时期的运量和运输成本费用资料，利用模型y＝a＋bx预测未来成本费用变化。
A.
高低点分析法
B.
最小二乘法
C.
费用要素预测法
D.
定性预测
【单选题】What no one would like to believe is that such a well-behaved gentleman _______ be a cheat!
A.
could
B.
may
C.
ought to
D.
should
【简答题】翻译: No one can doubt the essential fact that the traffic problem over the last years has caused wide public concern all over the world. Experts in increasing numbers are beginning to believe that such...
【简答题】No one in my family could believe Allegra had any disability, much less one as severe as hers. To them a disability was physical, something you could see. They knew her as a happy, normal child. That'...
【简答题】已知集合A={1，2}，集合B满足A∪B={1，2}，则集合B有______个．
【单选题】He walked along in the shadows, hoping no one would ________ him.
A.
believe
B.
recognize
C.
refuse
D.
with
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