问题
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1/8,1/6, 9/22,27/40,() A.27/16 B.27/14 C.8
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:1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
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:2/3,4/9,6/27,() A.1/9B.8/81C.10/81D.12/81
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1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
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一27, 一l4, 3, 27, 40, 57, ()。A.81 B.24 C.33 D.87
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2/3,4/9,6/27,() A.1/9B.8/81C.10/81D.12/81