?? ??????:?????????? ???
![](https://image.chezhanri.com/2019/1128/29fcb667abff3da7235c4e1015e11ea1.png)
????:1?????????:????????
2?????
3?????sn
4???????
5???????
??6??????12? ???????6????12????,?????????
??????????:??????,??????????????3?????????????,?30??“??????”,??????“?????????????????????”?????????????????????????“?”??“???”??????
????????????,?,????????,????????????????“???”?“????”??,??,??????????????“?????????????”??????,???,???????????????????????????,????????????“????”??????????????“??????”?“??”,????????????????????????????,??????????
??????:??