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

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

??2??15???????? ??????????????,?14?,??(NTSB)??????????????,????????????,?“??”???????????,????????????????“??????????????????”?

?,1???29??????????????????????,???????“?????????????”??????????,???,?????,?67???????

????1??????????????29???,??,?????????????????????????1??????????????????30????????? ??? ???

????????????14????????????????????,“?????”?,???????,??????

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

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

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

????,?,???????????????????????????????????,?????

???????????,??278??(85 ?????),????????????????,??????????????????????,“????”

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