????????????????

??

???????????12306????????1??21?????????????,?????2?????????4?????????????????????,???????

??12306?,???,??1?21????9??????????,?????????????????????2.35?????????????,??????20????2129.5???

????,??????,??,????????????????????,?????

????,??,??“?”?“??????”??,??,?????????????????????????,??

(??? ??? ??? ??)

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

?????????

??????????????????????????

????????