??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
CBA???(???)?????????
CBA???(???)?????????
??
????:
1???300????????:????????????
2??????????
3???????????
4??????????
5??????????
????
6
%
???:??