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

2???????

3??????????

4??????200??500

5?????????????

?????????,?????12??????1??,????????????????,??“?”????????????????,????,??,????4?????????????11??????,12?????????????????????????3???,???,???????

??4????1??,?????,????????5????????????????????????????????????10???,?????????????????????1.1???????,???????????4.09???,????????42.6%?72.7%,??

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