?? ???? ?????3.5????????
????:1???????:?????V
2???????
3???????????
4???????????????
5???????????
???????6?15???????? ?“pptv online”15????,?????“??????,????,????”??????
?,?????????1??????5?????????????????,??????????????1500?,???1.1??????????????????????????(??2200???????????)??????????,????????????2170????????,??????????????????3.5???????(???????????7000??)?
??????,??????,???????,??,??????;????????????,????,??????????????;???????,?????
???????“????,?????,???????????????”???????????????,???????:
????:????????,?????,????,?????????;????“???????????”:????????????,????;??????????????????:????????????,??,?????????,??????????????????(?) ???:??????????