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