单项选择题
A.result in decreased acceleration time only
B.lower the starting current and increase accelerating time
C.cause a greater starting torque
D.increase the starting current and pump capacity
单项选择题 Line losses in a distribution circuit are kept to a minimum by （）.
单项选择题 Which of the following components are used to convert alternating current produced in the generator windings to direct current?（）
单项选择题 In a series circuit, which value will remain unchanged at all places in the circuit?（）