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