单项选择题
A.CD:CAN B.CNTD: C./GUANGZHOU D.CNTD:A/GUANGZHOU
A.DSG:C/CZ301/15AUG B.TIME:CANSYD C./CZ301/15AUG D.CNTD:T/SYD
A.SK:CANSYD/CZ B.FF:CZ325/15OCT C.AV:CANSYD/CZ D.DSG:CZ325/15OCT
A.Abacus B.TravelSky C.Galileo D.Amadeus
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