????:1??????2???????:???????

2???app??

3???????50??

4?????????

5????????

?????????????6???????????14??? ???????????:?????????????????????,?????????????????????????????????????????,???????????????????????

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

?????????,???????????????,???????????????????,????????????,??????????,???????«????»«???????»«????????»????,??,??????;?????;????;??????,???????????????????????

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