?? ???“??????”,“??”???????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20190130/qy9J-hshmsti1028607.png)
????:1??????????:??????
2?????????
3?????
4??????????
5??????????
??,????????
??,????,???“????????????????”,????????????????????????????,???,??????????????“??”?????????????????,????
??
??????????,??????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??,????,?????,????????,??????????,??????????????????,????,??????????
??????:???????????? ?:?? ?? ???:??