?? ???4.2??????????
![](https://image.chezhanri.com/2019/1219/86c012eb7e6a3e901ed87e1c0e34af42.jpg)
????:1???????????:??????
2???????
3???????
4?????????
5??????????
?6?16? (?? ????????)?????????????,?????????????16??19?16??????????(????18????????16?),??????????????4.2?????????????
??,??35.8???????140.1?,???70???,?2?
??????,???(????????)
???????????:????