????:1?????????:????????

2????????

3?????

4?????????

5?????

???? ?? ??

??C919??

?????????

??C919?????? ?????

?? 1/7

9????21??,C919????????CZ3522???????,????????C919????“????????-????”????,????????CZ3521,??????CZ3522,????10?7????,??????????C919????;10???7????,????C919????

??:?????

???????????? ?????