?? “??????”?? ????????
![](https://image.chezhanri.com/2020/0401/7dd93bba7a74426f89bb41c5196019f4.png)
????:1??????????:???????
2????????
3????????
4?????
5???????????
??:??????????,??????,????????????????????1.5??,??????????????
????,????????3???????,??????????????,????????,????????
? ???????????????
?,???????,7??1??7?????????21???????,????????4.4?,??????????????59%;??????????????71%?????????????????????????????????????????????????????????????????7????????????21??????????,??????????????????????????????????????????????7??????150%,?????????“??”????????????????,??216%?
???????? “??”??
??,???????????????????????,???????5??,???????????????????
?? ?????
?????,???????????????,??????????
????????????:???????????????