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

2???app

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

4???????

5??????

????12??19??? ?“??”?????????,???19???????,??????,?????20???,??????????1????????????????????

  ???19??????????????:?????“??”

19???1??????,??????,?????????????5???????

?????,1??3???,3????3??????????????????14????,???

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

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