?????2???16?????? ????:??????????????,??????????????????15??????????????,??,???????????1?????5???????????????????????????????
???,?????16??????????????,????,??14???42????????????????,?????????????????
???,???????,?????????????
?????????????????????,?,??
?,????2020???????????????????,??,???4????,?????(??????????????????) ??????????:????
???:???????????
??2G?3G???????????
2017???????????
?????????4????????????
?????????2??????????
??????J?:?????????????
??????!????«????»?????
????????2017???
?????????????4??????
?????????????:??????
????14???:?????????????
???????????80?????????
????????????????????
????????????139??24134?
??????:??????????????
???:???????????
?????????????????????
??????????????3D?????
???????????:????????
???????:????????????5?
«?????»???????????
????????????????
???:???????????????????
?????????????
?????????????:??????