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

2??????????

3???????

4?????????qq

5???????

?C919?

??????? (?? ???????????????)C919?????????!??,???,????C919???,??MU5309??????????9??????????????30???????,?????????11??55???????????;??MU5316??????????????13?????30????????,??16?????????????????

???,?C919??,C919?????6??????????“?????????????”???“?”,??????????36?????????(?)?

???:???