参考答案
1-5 ABCBA 6-10 BDAAC 11-15 BADBA 16-20 BCAAB
21-25 CBBED 26-30 CFABC 31-35 DBDAC 36-40 ADAAC
41-45 CBACD 46-50 CBEAD 5l-55 ACDBA 56-60 CBADD
61-65 BDCAD
