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

??????:????????????“??”???

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

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

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

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

16??C919????

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

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

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