?? ???????????????
????:1??????????????:??????
2???????????
3?????????
4???????????
5?2023??????????
???(7?2??????),?ARJ21????????,?????
?9????????????????????30????,??“?????”?ARJ21???,??1?????????,??????,???????????
???????,????????????????2438??????????????????????????????????????????????3258.4??,?????,?????????????????????????????????,????????????????????????????????????????????????????,??,??1????????????????????????????????,???
ARJ21??,??????7897?,?????????????22253700??????
(??? ? ???) ?????:???