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1/8,1/6, 9/22,27/40,() A.27/16 B.27/14 C.8
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:3,4,7,16,()A.23 B.27 C.39D.43
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4, 3/2, 20/27, 7/16, 36/125, () A.39/144 B.11/54 C.68/196 D.7
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3,4,7,16,() A.23 B.27 C.39 D.43
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4,2/3,20/27,7/16,36/125,() A.39/144 B.11/54 C.68/169 D.7
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2,4,3,(),13/4,27/8,53/16。A.1 B.7/2 C.7/3 D.4
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1 3 8 16 27 ()。A.39 B.41 C.43 D.45