?? ????? ??????????????
![](https://image.chezhanri.com/2019/1216/39639881c09dca8c98c8da48ac757968.jpg)
????:1??????:??????
2?????sn??
3???????
4?????????
5????????
?????8???19??????????????? (?? ??)????????19???????????????????????????
![](http://i2.chinanews.com.cn/simg/cmshd/2024/08/19/10dceca5c9204396aae2a8a98896d781.jpg)
????????:????????????????19????,???????????????????,?????????????????
??????????:8??????????????19????,???,??,?????????????????,???????????????????????,????????,????????????????
?????????????,??????????,??,??????????????????,????????????,????,??«?»????????,???????,??,??????,???«??????????????????»??????????????????(??????????????)
?????????:??