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

2??????????

3???????

4???????????

5???????vx

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

??????,?????????500??????????,????;????????,?500???????????????????,???????????150?????

????????,???????????,??????????????????????????????,????????????7???

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

?????????????,????,17?????,??????????????10.9%,??????????????,????????7.3?????????;????,?????????GDP??????,?????????? ?????????????????????:??????