参考答案
1-5 ACCDB 6-10 AABDB 11-15 DACBA
16-20 ABCAA 21-25 BCEBD 26-30 FABFC
31-35 CBBAC 36-40 CBADB 41-45 CCDDA
46-50 DEBFA 51-55 CABCB 56-60 AABBD
61-65 CAABC
