????:1????????????:??95?

2?????????

3???????????

4?????200??500????

5???????

????????8???????8??(???? ??)??????8????7??????,7???????????????,????(????????????)???????????,??????????98%,???42%?????

?????????????????????????????,7?3.3???????,????????;????7????5000???????????????

??????????????????,7?????4.2???????????,???????17%???,???4??4?????????????????,?????????????????????,???????

?????,????????????????7????2.5???????????,???????????24%???????,????????????????,???7???

?????,??,??????,??????????????,????????????,????“??”??(????) ???:??????????