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

2?????Vx

3?????wx

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

5???????

??7?????27????? (??????????)7????????????????27??8???,????“??”????????????????,??????K812???????,??800???????????????

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

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

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

??500?,???,???????????,????????

???????????100?????????,?;???????????????????????????200????????????????,????,????????????????????????,????6??????12306APP?????????

???????????836????????????,??,??(????)

??:??????