问题
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1,3/4,9/5,7/16,25/9,()15/38 B.11/36 C.14/27 D.18/29
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1,3/4,9/5,7/16,25/9,______ () A.15/38 B.11/36 C.14/27 D.18/29
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3,9,4,16,(),25,6,()。A.5 36 B.10 36 C.6 25 D.5 30
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1,3/4,9/5,7/16,25/9,() A.15/38 B.11/36 C.14/27 D.18/29
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1,3/4,9/5,7/16,25/9,()A.15/38B.11/36C.14/27D.18/29
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3, 9, 4, 16,(), 25, 6, ()A.5,36 B.10,36 C.6,25 D.5,30