题目内容:
(21)
A.A-B-C-H-I-K;A-B-C-H-J-K;A-B-C-D-E-F-G B.A-B-C-H-I-K;A-B-C-H-J-K;A-B-C-D-E-F-G-C-H-I-K;A-B-C-D-E-G-C-H-I-K
C.A-B-C-H-I-K;A-B-C-H-J-K;A-B-C-D-E-F-G-C-H-I-K;A-B-D-E-G-C-H-J-K
D.A-B-C-H-I-K;A-B-C-H-J-K;A-B-C-D-E-F-G-C-H-I-K;A-B-C-D-E-F-G-C-H-J-K;A-B-C-D-E-G-C-H-I-K
参考答案:
答案解析: