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

2??????

3?????????

4???50?????

5???????

?????2??????8??????????? 2??????????8????11??????????????50??????,???????????,???8??17??????,?????10????????30???????????

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

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

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