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

2???????

3?????????vx

4???????????

5??????

????6?20?????????????????(??????????????????????? ?)????????20?????????????????????????,???????????14??????????????,?,??????6??21?6?,??????????

6???????20???????????,??? ??

6?????????????????19??20???????????,?,??,??????????????

6?????????20?????????,?,???????,?6???21???????????????6???????????,???????????????????????????

6??????????20???????????,??,?,?????????????????? ??

??:?12306???????????????????????,???????????????30?????????????????12306??(?)

??????:????