单项选择题
A.The generator and bus transfer section
B.The 450 volt, 60 cycle, 3 phase bus
C.The 120 volt, 3 phase, 60 cycle bus
D.The 24 volt DC bus
单项选择题 When the current in a power transmission line is increased, the power loss （）
单项选择题 An operational amplifier, as used in todays consoles, may have a calculated gain of 5√This means that as the input changes by （）
单项选择题 Why is it desirable to operate paralleled AC generators at the same power factor?（）