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