?? ???:???????????????????
![](https://image.chezhanri.com/2019/0311/20190311165441757.jpg)
????:1???????????:????????
2????????????
3???????sn
4?????????
5?????????
?6??19???????????????? (????????? ?)????????6??????????????????????????19???????
![](http://i2.chinanews.com.cn/simg/cmshd/2024/06/19/a42d502224d04a6a9a54f902928f4e5f.jpg)
??????????:???,??????????????????,???????,?????????
????????:?,????????????,??????????????????,??,??,??????????????,???????????,??????????,????
?????,?????,?????,?????????????????(???????????????????)
??????????????:??