21. The _______________ is often used to control the power output provided by the prime mover of generator.
(A) governor
(B) circuit breaker
(C) main switch board
(D) motor
答案:登入後查看
統計: A(175), B(45), C(89), D(36), E(0) #3407849
統計: A(175), B(45), C(89), D(36), E(0) #3407849