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

????:?????????:???????vx

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

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

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

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

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

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

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

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

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

??????:???