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

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

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

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

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

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

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

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

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

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

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

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