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

2?600??????

3????51??

4?????

5?????????????

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

??????????????“?????” ????2671??

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

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

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