?? ???????????? ??????????
![](https://image.chezhanri.com/2019/0224/20190224103254454.jpg)
????:1????????????:????????????
2??????
3????????
4?????app
5???????
?9???????????????11???????? (? ??????????)??11?????????????????????
??,????????????????,?????“?????????????????”?
???????????????????????????3????????????,??????19????1-3??????????????????,??????????????????????,???????????4-19??????????,??????????????????????????????????????????,????
??,??????60%,?????????????????????????15???????????????????????????????????,??????????2000???????,?????????????30???????????
“?????,????????????????????,???????”??????,??????????????????????????????????????,????20%25%????????????(????????????????) ????:?????