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