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

?????????:???????“??”??

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

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

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

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

16??????C919?

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

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

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

???:????

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