??
???????????2???15??? ??????????????????,??????14?,????????????????(NTSB)???????????????????,??????,?????“????????????”????,??????“?”?
??????????????????,1?29?,??????????????“?????”???????????????????????,????????,??????????????????????,??????????????????????67??
??14?,“???????????????”??????????,???,??????
???,???,???“???”???????????????????????,????????????????,????,??????
??,????,??????????????“??”???,????????????????????????????,“??????????”??????
??,??“??”???,???????????,??????????????????,????????
????,??,???????????????????????????,????
????????????,????????????278??(85 ?),???,??????????????????,“???”
???????????:????????????????
???????????????????????????????????