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单选题 The magnetic field is provided by electromagnets so arranged that adjacent poles have
学科：《轮机英语阅读写作》2019级轮机工程（卓越班）
时间：2023-12-09 18:52:28
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题目1单选题
is used to produce electric powerA. A. An alternatorB. B. A fresh water generatorC. C. A compressorD. D. A clarifier
题目2单选题
The magnetic field is provided by electromagnets so arranged that adjacent poles haveA. A. opposite polarityB. B. the same polarityC. C. negative polarityD. D. positive polarity
题目3单选题
The coil of wire rotating in the magnetic field produces theA. A. voltageB. B. currentC. C. powerD. D. frequency
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