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

2?????????

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

4??????

5???????

?????????????????12?20????????????????? ???????????,???????????,??????????????????????,??????,??24??

???????,12??????????17??????????????19?,???“????”??????18?????1000??????????????

???,???????????24%,??;??48%,??????????8????

??????,????,????,??????? ??????:?????