?? ?????????????
????:1?????:??????
2??????
3????????????
4????????
5???????
?:
??????,?????????????????????????2??4???8???????????
???:????????????:
??????,?????????????????????????2??4???8???????????
???:???????????????:1?????:??????
2??????
3????????????
4????????
5???????
?:
??????,?????????????????????????2??4???8???????????
???:???????????