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

2?????

3???????

4???100???

5?????????

?,???????????1???????????????????,????????500????,??????????????????,???253????

?????????,???????,10??,???

???????????? ?????????:????????????,???????????,?????????????

???????????????,??????????????,??8000????????????,?????????????1000????

???? ????:??????????1??,????????????3.3??,?????,????????????,??????????? ??????????????????:???