?? ???????:????????4.2?? ????????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20190423/HFV3-hvvuiyn6397649.jpg)
????:1???????????:?????
2????????????
3?????????
4?????????
5??????????
???????????????2?????????????????????14?? (????????? ?????????)????????????????????14???????????“??”??????????????????????????????????,?????????2015??3000?????????4.2?,?????????????????
???,????????????????????????????????????,?????????????????????,??????,???????????????????????????????,???????????????
????,????,???????????,??2015???3000????4.2???????????????????,????????????????,????????99.6%?,?????
?????????????????,?????????????“???????????????????????”,??????????????,?????“??????????”???6????????????10??????,???98%?????????????,????????????,?,???????????????????“??”?
?????????,??????????“???????”?????????,????????????????,????????????,?????????????????(?????????????) ????????:????????????????????