?? ????????????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20180320/rDVh-fyskeuc6799975.jpg)
????:1???????????:???????
2??????????
3???????????
4??????
5????????
??????????????2????5???????????? ????????????“??”5???????,??3??4?????4?7.3????????????????,?9???
??,?????“?????”?
???????????????????,?????(?????S)???,?,??????????????????????,??5????
??,??????????????????,??????????
??“???”???????????????????,???????????,1?21????????????2????3?????142????????????,??25????????2?2?????????????,??65????????46.3%,?68.6%?
??,??????????,?,????(???) ??????:??????