????:1??????100?:???????????

2??????

3???????

4?????????????

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

?,12???????????????3??10????58??,???????????C919????MU5421“??????????????????????”??,?159??????

????C919???,????????????????????????????,??C919???????7???

???,?????????????B-657T???????????C919?????????C919???,???WiFi??????,??,??????,??“??????,?Wi-Fi???????????”????(?? ????????? ??????? ?)

???:????