????:1???????500?4???:???app

2??????????

3???????????????

4???????

5??????????????

2??????????????21?????????????,???????“????????? ????????????”?????????????

??,??,???96%,?,??????,??“?????”????????????????????????,??,????????????,????“?????????????”,?“?????????????”???????“?????”????,???????“????????????????????”????????????2???,????????????“??????”?????????,???,??????????,?????(???? ?????????????)

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