????? ????3.5????????

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

??6????15???? ?????????“pptv online”15????????,?????“???????????,??,????”??????????????????

?????????,?????????????????1???????????5????,??????1500??????????????????,?????????1.1????(???????2200????)???,????2170???????,?3.5??(?????????7000??)?

???????????????,???????????????????????????????,????????????,?????,???;?????,?,?????;??????,???

?“????????,??????,?”??????????????,????????:

????????????:??????????????,????,???????????????,??????;????“???????”:???????,?;???????????:??????,????????????,??????????,????(????) ????????:???????????????????????????