?? ???????????????????????
????:1????????:??????
2???????????
3?????
4????????
5?????
??6??????????27??? ??????????????:?????,??????????????????????
???????????:?????6??????????27??? ??????????????:?????,??????????????????????
???????????:???????:1????????:??????
2???????????
3?????
4????????
5?????
??6??????????27??? ??????????????:?????,??????????????????????
???????????:???