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

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

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

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

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

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

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

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

??,?“???”??????????,??????,?????,??

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

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

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