备用电源系统(ABEX,HMG,SEP)向什么汇流条供电?
A. Essential DC bus(Using the TRU)
B. Essential AC bus(Using the E-inverter)
C. Essential DC bus(Using the TRU)和Essential AC bus(Using the E-inverter)
D. Essential DC bus(Using the E-inverter)和Essential AC bus(Using the TRU)