???,???????,??????????????,??????,???????????????????25?,???????????????????????????????,??“???”??????????????????????????“??”????“???”????????,??????????????????????????1000????????,????(???? ???? ???? ??????????? ????????)

???:??????

“??????sn”_????

?? ????? “????”????????

????:1???????sn:???????????

2????????????

3?51????

4???????50?

5????????

???,???????,??????????????,??????,???????????????????25?,???????????????????????????????,??“???”??????????????????????????“??”????“???”????????,??????????????????????????1000????????,????(???? ???? ???? ??????????? ????????)

???:??????