????:?????
??“????spa???”????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
??|DNA???????????!????
??|DNA???????????!????
??
????:
1?????spa???:??t???
2???????
3??????????
4??????????
5?????????
????:?????
????
6
%
???:???