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

2?????????

3???????

4??????

5?????

?????????7?3????????????(? ??)??7????????3??,?,??,????12306?????????,?7???????????????????,???,????404???????????,???????20??

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

7?3?7??30????????????,??:7????????3?????????(?)???????????????2?;7?4????(?)?2???????1?;7????????????????5?????????1?????2??????????;7?8?30???(???????)????2?;7????????9??????????31?2????;7????????6?????????????????30?10??????????????????2??;7????5?2?;7????????7???2??????????

?,???7?3?2??,7???????????3?4?5?7?????6?4?2?2?,7??6?7?2????????

????,?,??????????????,?????????480?,?70??,?,????????????????????12.9??,???????(???)

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