41. 一般三相感應電動機在靜止時其轉差率為何?
(A)S=-1
(B)S=0
(C)S=1
(D)S=2
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統計: A(0), B(0), C(1), D(0), E(0) #3935395
統計: A(0), B(0), C(1), D(0), E(0) #3935395