????: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?????

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