????:1???????:????wx

2???????

3???????????

4?????

5???????

??1??7?? (???? ?????)????????????????,7?????,???(??“????????????????”)B737?????????????????????????,??????????????????1000????????????????,????????????2???,??,???

7?,?????????????????????(???????????)

?,???5??????,?????????????????????????????????????,??????????????,???????????????????????????????“?????”?

???????????????????,???????????????,??????,??(???)

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