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

2?????qt

3????????

4??????

5?????

????????????2?????5??? (???????? ?? ?)5??????????????,???,550??

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

2???????????5??????????????,?????????? ????????????

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

??,??????????????????????????????20???????????,?????????????,???????????200????????????

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

?????????????????????,??12306??????“????????????”??????????,???(????????)

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