????:1?????vx:????

2??????????

3?????????

4????????

5???????

8??25?,????????????????(??)???????????????ARJ21???,?44?????????????????????,??????????

???????????????ARJ21????“??”???

?,?????,??????????????????,???????????????????????????4411????????????????????????2020?7???????????????,ARJ21????,????15?,?????????,????ARJ21????????????

?????,????????????????,????????????,??????,?????????,????ARJ21????????,???????????ARJ21???

2024????????7??,?ARJ21?????????

8???21??????,??????????ARJ21“????”????????????????????????????,ARJ21????????,??????????????????????????????????,?ARJ21?????????????????????,?????????????(?????? ????????????? ?? ???? ??????????????????? ??)

?:???