16.Which device is used to control the speed of the prime mover of a-c generator in order to ensure
the frequency of a electrical system is not influenced by various load?
(A)Governor
(B)Solid-state power converter
(C)Uninterruptible power supply
(D)Variable injection timing system
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哪個裝置用於控制交流發電機原動機的速度，...
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