参考答案
1-5 DCDAA
6-10 ACBDC
11-15 BCACA
16-20 BAACB
21-25 ABEAF
26-30 DBCE A
31-35 DCABD
36-40 CBDCA
41-45 BCBCB
46-50 ABCDE
51-55 ADBCB
56-60 DCACB
61-65 ACDAD