????:1???????????:???????

2????????????

3?????????????

4???????

5?????qt

???????????????,???????????“‘????’???????????‘??????’?????”“??????????”“?????????,???;???????,???????????”……??????,????????????????????“???????”,??????????????,??????

??????????“???????”?????????,??????????????????????,“??,??????”???????????????,????????????,???“?????”??“????????”,??????????,????????????????????“????”????,?????????????12306???????????????????“????,?????????????????????”,???????????“???”???,?????,????????????????,????“???”??“??????????”???,???????

????“????”????“????????????????????????????????,??????????”????“????”???????,????“????”????“?”????;????,??;????C919??????,???????CR450????????????……???????????????????????????????????,?????????????????“?????????????????????”??????????,???????????????,???????????????“???”??“?????”???“??????”?

????“?”?????“???,?????????????”?????????“???????”“???????”?????“????????,???????”,?,?????,??????????????????????,??“?????????”,????“???”,??????????????“?????”????????“???”???????“?????”,????“????”???????????????“???”?????????????????????????“???????”?,????????????????????(?:??) ?????:???????