?? ????????6???1???
????:1???????:????????
2????????
3???????
4????????
5???????
????????????6??6???????? (?????????? ????????)???6??????????,?????5?????????????????,??????6?????????1?????????
??????,???????5?????????????????20????25?,??????????????????12?????????????????1.5??
?,??,??2???????????,??4??????6???,???1????
?????,??????,???
?,???(???????) ????:???