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【单选题】
在直流电机中,发电机的额定功率是指A.
输入的功率
B.
输出的机械功率
C.
I a U a
D.
电磁功率
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举一反三
【单选题】What did the company president do the previous night?
A.
He considered his feelings and thought about his problems.
B.
He thought about whether he should say something.
C.
He planned how he was going to tell his workers.
D.
He wrote out the different habits of different peoples.
【单选题】The national compulsory education provides them ______ to economic progress.
A.
admission
B.
acceptance
C.
approach
D.
access
【简答题】If policymakers hope to make faster progress in improving economic performance, reducing poverty, and slowing 【M1】_________ population growth, they will have to go much farther in 【M2】_________ their ...
【单选题】Why is it possible that economic growth and technological progress are environmentally friendly?
A.
Because they can keep people away from the natural world.
B.
Because they may help preserve more natural land.
C.
Because they can increase productivity.
D.
Because they may not produce pollutants.
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