????:1????????:?????qq

2???????????

3???????

4????????

5???????

???,??,????????,??????????????????,?????

????????????,??????,????????????,?????????,??????????80%,?????????

?????????????,?????,?????????????,????????????????????2000????????????????????,???????,?????????????????,????????????,?????????

???? ??????:?????????????,???????????To C(???????????)???,??????????????20%??30%?

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

??????????,???????????????????????,????????????,???????,???(??????????) ?????????????:????????????????????