?? 20?????????? ????????
![](https://image.chezhanri.com/2019/1112/b8fbb2eecb8a3d2d7c8ae9a18673301c.jpg)
????:1??????300?1????:????????????
2????app
3?????????????
4???????
5??????????
?????7??????3?????,???????????????20???????????????????????????????,??,?????
?????????????,??????????????1???????????????5000??????????1000????????,???,???????????
?????????????????“??”?1?,???????????“???????????????”,???????
5000????,????????????????????????,?????????
1000????????????? “??”????????????«????»???“????????????????????”?
??????,?3????????,????????75?????????????????????????????????????,????(???????????????????? ?????????????)
??????????????:???????????