A.格羅娜絲和GPS B.伽利略和北斗 C.北斗和GPS D.伽利略和GPS
A.50 B.10 C.1 D.20
A.數(shù)據(jù)完整性、數(shù)據(jù)保密性、數(shù)據(jù)可用性 B.數(shù)據(jù)完整性、數(shù)據(jù)保密性、剩余信息保護(hù) C.數(shù)據(jù)完整性、數(shù)據(jù)可用性、剩余信息保護(hù) D.數(shù)據(jù)可用性數(shù)、據(jù)保密性、剩余信息保護(hù)