問題詳情

39. Currnet changing in direction with rising and falling amplitude is _________ .
(A) AC (Alternating current)
(B) DC (Direct current)
(C) generator
(D) fresh water generator

參考答案

答案：A
難度：適中0.666667
統計：A(10),B(0),C(1),D(1),E(0)