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