??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
?“??????”?? ????????????????
?“??????”?? ????????????????
??
????:
1?????sn????:?????????????
2?????
3??????
4??????????
5?????????
????
6
%
???:??