?? ????????????????
????:1???????????:???????
2????????
3???????
4?????98?
5??????????
???12306??1?????????????????????21???,??2??????4???????????,??????
?12306??,??,????????1??21?????????9?????????????????????,?????????????2.35????,??20???????????2129.5????
???????????????????,??????????,????,???????????,?????
?,??????,??“??????”???“????”?,??,????????????,???
(????????????? ?? ? ??)
??:??????????????