?? ?30???????????????
![](https://image.chezhanri.com/2019/1113/8cfd1c754a92f4bf42f884dae888455b.jpg)
????:1????????:??????
2?????app
3?????
4???????
5???????????
???????????7????6???????????????? (????????? ?????)?????(???????????)??????30???6??????????,??????????????????,??????????????,?????????,??,????
????????,????“????????????????????????”“?”????????“????????????”3????,“?????????”??20????????????????????????????????????,?????????????????“?????????????????????”??2000??????,????
??,??,??,???,?,?????,????????????????????????????
????,??????????????????????????????????????????????,????,????????????????,???????(??????????) ????????????????:????????????????