問題詳情

34.Which device is used to provide a limited amount of electric power for a finite periods of time to certainloads in case of a power failure on its supply side, with no break in the flow of power to the loads?
(A)Power governor
(B)Transformer
(C)Solid-state power converter
(D)Uninterruptible power supply

參考答案

答案:D
難度:適中0.588235
統計:A(0),B(2),C(5),D(10),E(0)

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