????:1??????????:??????qq

2??????????????

3????app

4??????

5???????????

11??????12?,????????????15???????(????)????????????,???????C929?????,????C919??ARJ21?C909???130???????

????(??)???????????????????(??)????C929????????????,????C929?????????????

????,C929?,????????????280????????,?12000??,???????????

?C919????????????C909???????????60???????70?????????????????????,??60??C919??????40???C909?;????????30???????????C909??????????????,???????20???10???(????????????? ??? ? ??????)

?????????????:??????