??????11????????????????????????????????20????????????,?????,?????

??,????“??”??,???????????,???“?50??”?

(???? ? ?????????????????????????????????? ??? ????)

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

“???????????”????

?? ????????? ??“???????????50?”?

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

2????????

3????????

4???????

5???????????app

??????11????????????????????????????????20????????????,?????,?????

??,????“??”??,???????????,???“?50??”?

(???? ? ?????????????????????????????????? ??? ????)

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