问题
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1, 1, 8, 16, 7, 21, 4, 16, 2, () A.10;B.20;C.3
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1, 1, 8, 16, 7, 21, 4, 16, 2, () A.10;B.20;C.3
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1,2,2,6,3,15,3,21,4,() A.46;B.20;C.12;D.44;
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:1/2,2/3,2/5,1/2,8/13,()。A.32/21 B.7/15 C. 9/11 D. 1
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1/2,2/3,2/5,1/2,8/13,()。A.32/21 B.7/15 C. 9/11 D. 1
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1, 2, 3, 8, 21,46, ()。A.70 B.87 C.90 D.100