?? ??????? ???????????
????:1???????:????????
2??????????
3???????
4???????
5????????????
????????1????22?????? (???????????? ??)??22?,???????????????,????????????????????????????????
?????????????,?,???
?,23????????????27?????????????,??,??,??????????????????????????????????????????????,??????????3???????8cm,???????????????????????????????12cm????????????????
“?????????”?????????????????,????????????????,???,???????????????????????,????8?????12?,??,?????????????????14?????,??4?6??????,?7????9?????????28??,????????????????
??????,??????,??????????????????????,??????????24?27????????????,25??????????,?????????????????,????,???,???(?) ???:????????????????