以下电报里C/B的意思是ZCZC5HK0041260552 GGZGGGUDXX 260552ZBBBCKXX ATTN:GDO/D CSNOCTC/BFLIGHTPLANASFLW: AIRCRAFTTYPE:A320 DATEANDSKED:PEKTIME 1.CSN3310ZSPD04150545ZHCCON07/14/21/28OCT2015 FLIGHTROUTE:ASSKED FLIGHTLEVEL:ASSKED PLSENSURE/WLK/87786586
A.客运加班
B.货运包机
C.调机
D.训练
正确答案是A