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

2????????

3???400?4???????

4???????

5???????????

?????????????????6?15???? (? ????????????????????)?15?,??,?(??)??????(?????)??????????????????????(??????????)?????????(?)????????????????(?)???(??????????????)?6???????????????15??19???

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

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

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