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

2?????

3???????

4?xc8??1xc

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

1???26???????????,C919?CZ3803????????? ?? ?????  1?26?????,C919???????CZ3803??????????? ?? ??  1?26?,?????C919??CZ3803??? ? ?  1?26???,C919?????CZ3803????? ? ????????  1?26?????,?????????C919??????? ? ???  1??26?????,C919???????CZ3803???? ? ??  ????:??