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

????:????????:?????????

????????:???????????,????,?????????

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

19?????????????????9?14?????,?????????????????????????????,???????/???????????????,?????????

"???????????????""???????"??????????????

19?,????“????????????????”?????????“??????????”????,????????????????????????????30??????????????????,????,??????????????????,????????????????

C919????????

19????,???????????????C919???,??2??8????????,?????????????????????,??????C919???????,??????????????C919????????????,???

?????:??