?? ?????????????????
![](https://image.chezhanri.com/2020/0325/c804f88e4be377b1e83a6d0fc3812bb3.jpg)
????:1??????????:??????????
2?????vx
3?????????
4???????
5????
6???20??????????,??????????????????????????,????????????????????????? ??????????? ? ??
6??????????20??????????,??????????????,???????????????????? ?????????????????????? ? ????
6??????????????????????20?????,???????????????????,???????? ?? ?????????? ??
6??20?,?????,?????????????????????,???(??)??????????????????????(?????????????????)??? ?????????? ????? ?
??????:??????