A.1 B.4 C.10 D.20
A.10 B.9 C.8 D.7
A.车载电台 B.GSM-R C.以太网 D.信号安全数据网
A./opt/evlog B./var/evlog C./var/eventlog D./rbc/eventlog
A.1×1取1 B.2×2取2 C.3×3取3 D.2×2取1