?? C919?????????
????:1???????100?3??:??????????
2????????
3??????????
4?????????
5?????
1????17?,??????????12??????8????,?????????????147??CZ3380??,?C919?????????“???”,????“??????”????????????,???????C919?7?????,???C919???????1?????C919??????????164?????,??????????????,2.25??48.26???,???(???? ?? ? ????????)
?????????????:?????