?? ????????????????
????:1??????????:????v
2??????
3????????
4??????????????
5???????2019
?1????????????????7?? (???????????????????? ???????????????????????)??????,7?????,???????????????????(??????????????“??”)B737???????????????,?1000??,???2?????,???,????????????????
7?,????(????????????????)???????????,??????????5??????????????????,?????????????????????????????????,?????,???????????????????????????“??”?
?,????,???,??????????(????????????????)
?????:???????