????:1???????:?????

2????????

3?????????????

4???????

5????????????

??????10?????30???????????? (???????????? ??????)?????????30??????????????????????????,?????,???????“???????????????????????????”?

????????,????????????????,????????????????????20%,????30%?

???????????????????,?????????,??,????,??????????????????????????????????????????,“3??6????????”???,???,?????????????????????

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