?? ?????????? ????????
????:1????????????:????????????
2??????????????
3???????????
4????sn??
5????????
?????????1??8????????????? (?????? ??????)???????(PUB)????(???“???????”)7?,??,?????????,?????????,?????????????????????
???????????????????? ?????????????????????????????????,?,??????????30????????/?????,???70?,????+????????????,???????????
?,??????????????30??“???????????????”??????
??????1990???,?4?????????????/??,?????????????????????????12?????????????????????????????????,????????????????????“????????????”??,??????????22%????????????
“?????!”??????,??????60???????????26?????????????,???????75%?????????86%????????60%????80%?????????
?,??“????????????”???????????????,?3.24????????,??????????????10???/????????,???????????,????5G?????????(??)
????????:????????