参考答案
一、单选题 (共80题)
1-5.DDAAB 6-10. DADBB 11-15. ABBAC 16-20. ABDBC
21-25. DBDAB 26-30. ACBDB 31-35. ABADB 36-40.BCCAA
41-45. BACCB 46-50. BADCD 51-55. BCCAB 56-60. DBBBC
61-65. CACDD 66-70.CDBDC 71-75. DBCCA 76-80. ACCDD