A、voltage regulators
B、field rheostats
C、reverse power relays
D、prime mover governors
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A、amount of field excitation of the leading machine B、load-speed characteristics of the governors C、amount of field excitation to the lagging machine D、type of alternator
A、Constant pressure system B、Variable pressure system C、Variable displacement system D、Constant volume system
A、Class 8 B、Class 3 - flammable liquid C、Division 2.2 - nonflammable gas D、All of the above are correct
A、the raising of the standards of teaching and the reform in curriculum B、the raising of the standards of teaching and learning and the restructuring of the schools C、the raising of the standards of teaching and the improvement of the standards of learning D、None of the above
A、volume of liquid in the tank B、volume of displacement of the vessel C、location of the tank in the vessel D、height of the center of gravity of the vessel
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