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

2???????

3???16k??

4???????????

5????????

9???????24??????????,????????????????????,???

?????????????,??,???,?????????,???:

?????????????????18???????

??????????????????????????,???????????4%???????????10%,?????????????20%???30%?

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

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

?:?????