CRH380B型动车组BCU电源故障(658a)的故障原因为WC()制动面板电源断开

CRH380B型动车组BCU电源故障(658a)的故障原因为WC()制动面板电源断开

A.28-F19

B.28-F20

C.28-F21

D.28-F22

正确答案是1