????:1?????????:?????????

2?????

3????????

4??????

5?????????

??: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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