?? ??????????:???
????:1??????????:????q
2?????????
3???????
4???sn??
5??????????
??6??????12?? ??????????????6????????12???????????????????,??????????????????
????????,?????:?????????“?”,????“???????”,????????????????????????
??,??????,??????,??????????,??????????????????,???????,?????????,??????????,?????????????????????????????????????
??????????????????????:???????????