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

2???????

3???????

4?100???????

5???????

?10????????2???????????????? (?? ???)??2?,10??????????1??????????????????,??2144.8??????????????????,???????????10??2???????????,??1820???,????????1028??

10????1?????????,??????????,?? ? ?????????????

?,????????????????????2????????8????????,???12306?1.21???????,??,??????????????????????????????????????????;????????????????????????????????????????????????

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

?????????????,??,?????18???????“?”????????10?2??????,??,????????2???3???????????“?”??,???????????,???,???????????(???????????)

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