??2?21??? (??????????)???????????????21?????,?????????????????,????,??????????????,?“????????????”??????????????,???????

??????????????????????,????????????????????????????????????,???????,??????;?????????,??“?????????”?,???????????????;?????????????????,?????????????????,???????????

????,??????????????????????????????????,????????????,?????16??,??????????23??,?????????13??????????????????35???????????45???,??50%?

??????????,???????????????,??;???????????????????????,????????????????????????????,??????????????1???????,???????????(??) ???????????????:?????

??

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