????:1???????600??:????

2?????????

3???????

4?????????

5??????app

???????,????????????4000??????????????????????,??400???

???????????,?,???????????????,?????????????

??????? ????????:?????????????12?????????????????????2.5?????????????????,????170?????????,????????????“????”,????,???????,???????????

?????????????? ???????????:?????,???,??????????170?,???????????????,?????????????,?,????????????600??????????????,????

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

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