单选题Which of the following types of motors is often designed for use in correcting power factor?（）APolyphaseBWound-rotorCInductionDSynchronous
单选题
Which of the following types of motors is often designed for use in correcting power factor?（）
A
Polyphase
B
Wound-rotor
C
Induction
D
Synchronous
参考解析
解析：
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