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

2???qt????

3????????????

4???????

5???????????

??????9??????????????25????????? ??“??????????????????????????????”??,??,??????12306??App???????,??????????,?????????????“??”?,????????????,??????????????,???????????,?????????????

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

???????:??????????,????????,?A????+?????????????????B???????????;???????????,?????????????????C??????????????+??D??????????????? ???:??????