?? ?????????????????????????
????:1?????Q:???????
2???????
3???????
4???????app??
5??????????
12????????????????????1?????,????,????,??????,?,????“??????”??,???????????????“????”????
????,??????????,?????,??????????????????????????????,?????????;????????????????,?????????,????,???????????????????????????????????????????,???????
????????12????????????20??????
(????? ???? ??? ????)
????????????????????:??????????