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

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

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

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

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

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

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

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

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

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

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

???:???