?? ????????? ??????????
![](https://image.chezhanri.com/2019/0806/20190806105655824.jpg)
????:1???????????:????600?????
2???????
3??????????
4?????????
5?????
???????????????????????????7???????????????30????? (????????????? ?????????????????????)???????????????????30??,?(????????:???????????)?,??????????????????,????
????????????????????????????????(????)??????????????,?????????,?“?????????????”??,???,???????????????;??????????30%??,???????“??”?????????????????????????????????93???
????????,???????????????,?????“????????????????”????????????????,????????“???”???????????,??????????????????2???,??????????????????(EF?)?????????????????,????,?????????,???
?????,?????,???“???????”????????????,??????????(????) ?????????:?????????????