???: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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