问题
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:2/3,4/9,6/27,() A.1/9B.8/81C.10/81D.12/81
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1, 3, 3, 9, (), 243。 A.81 B.9 C.12D.27
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6,9,12,18,18,27,(),36,30,() A.24,45 B.45,24 C.27,54 D.54,27
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3,-3,9,-3,27,-3,(),-3 A.81 B.243 C.729 D.54
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2/3,4/9,6/27,() A.1/9B.8/81C.10/81D.12/81
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1,1,5,3,9,9,13,27,(),()。A.17,81B.16,54 C.15,36D.14,42