????,????????17?????????????,?(??????????????????)???????

???1??????15????,???????????????????????????16?????,??,???

?,?,?48??????,??????????????????,????20??????????????????????;??????,??17????????21?????????????????5??????????

(? ?) ???????????:??????????? “??????app”????

?? ???????????????????

????:1???????app:????????

2??????v

3?????????

4?????????????

5?????

????,????????17?????????????,?(??????????????????)???????

???1??????15????,???????????????????????????16?????,??,???

?,?,?48??????,??????????????????,????20??????????????????????;??????,??17????????21?????????????????5??????????

(? ?) ???????????:???????????