??????????(??2024)
????:2024-12-11 15:26:10 ??:????
????:??????:?????50?????
????????????????:C919???
????:????,??????????????????(?????????????)
?????????:???????? ??????????
??:??????????????????????????????????????????????????
????????:“???????????”
????,????4.8%,??????????
9?,??,????,??????????,?????
??? ???????
?????:????????
?????:??????????
