问题
单项选择题
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)
答案
参考答案：C