???????????? ??????????

????:????????????:????200??vx????

1?????22?,??,???????????,1???23????27???,?????????,??????????????????????????,???????????????????????????????????????????3???????8cm,?????????????????????12cm?????????,?????,??,?????????????,??????????????????,?8????????????12?,?????????????????14??,??4????6????????????,?????7?9????????????1??????26?????????????27?,??6???8???????????????????????????

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

???????:??????????????