?? ???????????????????????????
![](https://image.chezhanri.com/2020/0403/9c1ff44d4fc382b7147e628966a24f6c.jpg)
????:1??????????:600??????????
2?????????
3???????????
4????????
5???????
???????????????????????????????????9??????10???????????? ???????????????????????????????????????????????“????????????????????????”?????????“?????????????????????????”,??????????????,??????????????????????????,?????????????????????,??????
????????????????????,???????????????????????????????????????????????0.6%???0.4%,??,??????????????????????
?????,??0.05%(???????????????????1????????????30???)??0.1%??????????,?,????????????,????????????????????????“??”???
???,?????????????????????????????,???????????????????????????,????????????????“??????????????????????”???????????,?“??”?(?) ?????:????????????????????????