38. 若v(t) =,請問 v(t) 的頻率與有效值分別為何? [自來水 111]
(A)50Hz,100V
(B)25Hz,110V
(C)60Hz,110V
(D)25Hz,100V

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統計: A(1), B(1), C(1), D(0), E(0) #3839057