?? ???“???????”,“??”??????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20180330/md7f-fyssmmc5200323.jpg)
????:1???????????:??400??3????
2???????
3?????
4?????????
5????????400??
??,??????????????????
??????????????,????,?????“???????”,???,?????????,?“????????????”??,???
??
??,??3?,?,?,?????????“??????????”??,?????,?????????????????
??????????????????,???1??????25????2?????????4????,?????????????,2??????17?????700?,?,??42%????????2????????8?????????????????,?????????2000?,?2???????????????????17???3???500-600???
????,??,????????????????200??????????????????????????????????????????,???????????????40%??????????,????????????????????,????30%-50%???????????????
?????????????????,????,???????????,??2000-3000?????
??????,???“??”??,???????????????-????????????????????????-?????-?????????,??????20????????????,????210???????????(??????),????
????,?????????????,?????,??700-900????,2?????300-400???????????,????4000-5000???????,2???1000-2000??????,?????????????????
?“??”
?????????????????,??????????????“?”,“????????”??????????????“??????????????”,????,“????”????????????????,???????????????????????????????????????????????????????????-?-??????????????“???”????,??????????????????????????????????????????????????????????????????????????
????????????????????????????,???????????????,??,??,??????????????????
???????????????????????????????????????????,?“??????-????”???????,??,?????4???,??????“????????????+?????????????????”?5?????4??????????????,?????????,???????????,??,???,????,?????,??????????????
????????????:??? ????????:????? ?????? ????:???