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

2?2023??????????

3?????????

4????????

5?????????

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

????

??

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

?? 1/6

?????,6??????????????15??,?????????????????,?????????????“???????????,???”?,????,???????????????????????????,????1325.5??,????1345.5?????????

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

???? ?