????:1??????VX:????????????

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

3???????

4????????????

5??????????

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

????C919?

??

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

???????? 1/5

9??????????????28???,???????????????,?OD634???????????????????????11???????????????55??????????????????,??OD634??,????,????????????3???????????????????15?????,?,4?30???,????“??”???????????????????=??,?????

??:?????

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