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

2???????????

3????????

4???????

5?????????

???????????????????(??)

?“??” ??????????????????2671????

???????????????2??20????????????? (?????????)?????????20????????????:???????,????2??19?24??,????????????2671??????????????????(??????)3??????

?????????????????????,????2??19?24??,??????16.9??,???64.7?????,??,????,??????35%,?20%?

?,?????????????????????????????,?????????????????,????????????????????????????“????”;?????????,??????????????????????“12+N”????????;????,?????,??? ??????????:??