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