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

2????????50?????

3?????

4???????

5?????????

?????12???????????20????? ??????????????????20???,????????19?????????,?9???8??????

???19?,???????????3??????,???????,????????????????????????,???

????????????????????,????????????20?????,?????,????,???????????,????????????,?????????????,?????????????????,?????

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

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