单选题The load between two steam-driven alternators operating in parallel may be adjusted by varying （）Athe speed of the alternatorsBthe field strength of the machinesCthe power factor of the alternatorsDsteam supply to the prime movers
单选题
The load between two steam-driven alternators operating in parallel may be adjusted by varying （）
A
the speed of the alternators
B
the field strength of the machines
C
the power factor of the alternators
D
steam supply to the prime movers
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