由题意得:3x-25>2x+13-1,解得x<4,
∴x取0,1,2,3.
无人值守的业务库,不需配备的技、物防设施是()
A.防暴枪
B.声音复核装臵
C.多种探测原理的探测报警装臵
D.与监控中心实现远程连网
()is a space system using one or more artificial earth satellites.
A.satellite network
B.Satellite Link
C.INMARSAT
D.Satellite System