?? ????????????????
????:1?????????:?????????
2?????????
3???????
4?????v
5???????
??6??28??? (? ??)?????28???,??,?????,??????????????????;???????????,????,???????
??????????,????????????(??)
???:????6??28??? (? ??)?????28???,??,?????,??????????????????;???????????,????,???????
??????????,????????????(??)
???:??????:1?????????:?????????
2?????????
3???????
4?????v
5???????
??6??28??? (? ??)?????28???,??,?????,??????????????????;???????????,????,???????
??????????,????????????(??)
???:??