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 2 3 4 () 9 8 12 18 27 A.6 B.7 C.10 D.11
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0,1/2,8/11,5/6,8/9,() A.31/34 B.33/36 C.35/38 D.37/40
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1 2 3 4 () 9 8 12 18 27A.6 B.7 C.10 D.11
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0,1/2,8/11,5/6,8/9,()A.31/34 B.33/36 C.35/38 D.37/40
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2/3,4/9,6/27,() A.1/9B.8/81C.10/81D.12/81