??
????: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???????????????????????????,???????????????,??,????
???????????????????????:??????????????
??????????? 16??C919“??”???????????????????????????