?? ?????????????
![](https://image.chezhanri.com/2019/0812/20190812151804573.jpg)
????:1???????:?????????
2??????
3?????????
4????????
5???????????
??6???19?????????? (???? ??)??????????,????????????????????????
19?,?????????????????3.46????????(???????????????????,??)??????????,???
??,???????????????????????(??)2.13???,??,?;????????????????????????????????????(??)0.69???,?,????,??????????????????????????????,??;?????????????????0.64?,?????????????????,???????????????????????
??,??4.43??????????????,????????????????
????????????????,?????????????4.43???,??????????????????????????????????????????????????7???????,????????????????????,??,??????,?????(??????????) ???????????????????????:???????????????????