????:1???????????:???????

2???????????

3???????????

4??????

5???????

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

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

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