????:1?????:????5??400

2?????SN????

3?????

4?????????

5???95?????

9???????15?????,????????????,????????????????9?????????29?,?10?????????8????????????????,???????????????10???????????,????????1.75???????????,?10??1????????????????,???2100??????????,9??15????????,???12306??????????,9???15??9??29???

??????,???????????????????????????,???????????,?“??????????????????????????”???,??????,????????????,??????12000????,????354??????

?,?????,?????????,??????????12306????????,????????????????;??????,????????

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

????:??????