?? ?6??????????????12?
????:1??????:?????????
2?????600???
3?????
4??????200??
5??????????
??:?27???????????????????????????,??,??6?????12??????
??:?????????:?27???????????????????????????,??,??6?????12??????
??:???????????:1??????:?????????
2?????600???
3?????
4??????200??
5??????????
??:?27???????????????????????????,??,??6?????12??????
??:???????