?? ?????????????????????
????:1????????????:???????????
2???????
3?????200????
4??????
5???100??????
????????????????6?????????????12???????????????????? ??“????”????????????????,?,6??13??15??,?????????????????????????????,????,????????????????????????????????????100200??,??????????????250400???????,????????,??????????????????????,?????????,??,??????????????,????????????????,????????????,??,????,???????
6????12???????????,??,???,?????????????????????????????????,????????????????????,??????????????????????????,??????????????,??????????????????,????????,???????????????,??????????“??”?????,???,????????,???????????????,????????????“????”??,??,?,???
?????????????:??