选择题
01-05 A C B A A
06-10 D D C C C
11-15 C A B D A
16-20 C C B A C
21-25 A C B D A
26-30 C B C D C
31-35 C C B D C
36-40 C D B D A
41-45 B A D A D
46-50 C D B D D