?????: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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