?? ??????????????????????
????:1????????????:????????
2?????????????
3????????????
4??????????????
5????????????
??????????????????????12?20?????? ??????,??,??,?,??????24????????????
??????????????,12??????17???19??????????,???????????“??”???????????18???1000??
?????,????24%,?????????????????;?????????????????48%,????8?????
?????,???,??????????,???????? ?????:??????????????