??
???????????????2????????21?? (??????????)?????????21??,??????,??????????,??,??“??????”??????????,??????????
?????????????????,?????????????????????,???,??????;?????,????????????“?????????”????????,?????????????????;?????????????????,?????????,???
????????????,???????????????????????????????????????????????,????????,??16??,?23??????????????,??13????????????35???????????????45????????????????,?50%?
?????????????????,???????,?;???????????????,?????????????????????????????????????????????,?????????????????????1?????????,??????????(????)
??????????????????:???
?????????
????????“????????”?????????????????????????