?? ???:?????? ??????
????:1???????500?4???:???????
2???????
3???????
4???????
5??????
??11??????????28???????? ??????????,11?????????????28????????????????????????,??????,??????????????????????????????????????????
????????????:??20??????????,???????,????,???,?????????????
??????,11??????????20????,???,?????,??????????,??????????????;??????????,?;??????????????,????????????????????,????????????????,????????,????????
???????????????????????:???????????????