?? ???????????2000???????
????:1?????????????:??????????
2?????500????
3???100????
4???????
5?????????????
???????9??15?????????????? (????? ???????)???????15???,??????????14????,?2000???
?????????15?????,???,????????????????????????????,??????????????????????,??,??
???????????????,??14?????????11??????????,??????,????????????????????28?????????(??)
?????????:?????????