????:1??????????:?????????

2????????????

3???????

4?????

5???app????

??????2???????????????21?????????? ???????????,?????????????,?????????????????????

???,?????????,???????????,???????????,??????,??;????????????,??????????????????????????,?????????,??????;??,????????????????????;????,??????????????????;???,?????,????????????????????????????????????????,???????

??????,?????????,??????,??????,????,??????????????????????????????«?????»«???????????????????????»?????,??????,????????;??;????;??????,??(??????????)

???:?????????