???????:1?18??,?12306????????????,??????18????????????????8?????????,?1.75?????????????????,???18?????2????????1????,????

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

????????,??????????????????????????????,????????,?????,????????????“????”????800????????????????,?????600???

????????????????????????????????????????????,??1200????

?????????????????????????,????????????????????????????“???”“?”???,??????65%?

16????C919????

????????????????,???????????????16?????????C919????????,??C919???????

??????,????10???C919?????????????,?????????3??????????C919??,??????????????????????????5????????,??????400??????????3??C919??,???????????????????????????????????????????????????4??????

???,??C919??????????????????,???????????????????????,?????????,???

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