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

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

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

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

?????????????????????????:???????????????????????? ??“????????”

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

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

2????????

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

4?????????

5????????

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

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

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

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

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