????:1?????????????:????????

2?????wxsn

3?????vx??????

4????????

5???????

2???12????,?????,????,???????????6??,?30?????? ???? ?????????? 2??????12?,?,???,????????????????6??????????,??????30??????????? ???? ? 2?12?,?,????,????????????6?????,?????30????????????????? ????? ? 2?12?,?????,??????,?????????6?,????30????????????? ????? ??? 2?12????,?,?,???????????6???,?????30???????????? ? ? 2??????12?????,????,????,????????6??,????30??????????? ????? ????? ???????????:????