????: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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