?????????????????

????:????:????

?????2?????????????????????15????? ????,??????????????14??,?????????????(NTSB)???????????????,??,????????????“??”????????????,???????????????????????“????”?

??,1????29?????,??????“??????????????????????”??,?,????,???????????67????????????

???1?29???,??????????????,???????1??????????????????????30??????????????????? ? ??????

???14?,“??????????”????????????,??????????,?????????????????

????????????,??,??????????????????“??????????????????”??,??????,??????????????????????????????????????,????????

?,???,?“?”?,???????????????????????,“??”???????????????

???,???“??”???????,??????????????,?????,???????????

??????????????????,??,???????,????

???,????278???(85 ???????????????????????),??????????????????,?,“????”

???:???????