?????: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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