?? ??????????????????? ????????
![](https://image.chezhanri.com/2019/0726/20190726172538333.jpg)
????:1?????????:????????
2?????????
3??????????????
4?????app??
5??????
?????6????21??(???????????????? ?????)????(??????????“???????????????”)21????????,??????,??????,????????????9??????????,???????,????????????,???????????????????????????,????????????????
????,??,?????????
??????,???????????,???,???????
???,?????????????????????????????????????????????????????????,??????????????,??????,????????,????????????????,??????24??????????????,????????????????????
??????????,??,???????????,??,??????????????????,???????,???????,????,??????????????????????,?????????????????????,???(?????????) ???:???