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

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

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

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

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

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

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

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

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

???:???????

??

??:???????????,??????????,??????????????