?? ???:????????????????????
![](https://image.chezhanri.com/2019/0729/20190729175846948.jpg)
????:1????????:???????????
2???sn??
3??????
4???????????
5??????????
??????????????????????6??27?????????????????????? (?????????? ?????????????)????6??27???
![](http://i2.chinanews.com.cn/simg/cmshd/2024/06/27/0392ed3015814dcd83756ae772bd38b1.jpg)
??????:??????????,?,????????????????
?????????:???,????????,????????????????????,??(????????????????????)
?????????:???