????: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???????????,???????????????????,?????,?????????

????????:????????