问题
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2/5,3/7,4/10,6/14,8/20,12/28,()A.224/56B.14/32C.20/48D.16/40
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2/5,3/7,4/10,6/14,8/20,12/28,() A.224/56B.14/32C.20/48D.16/40
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:-26, -6, 2, 4, 6, ()A.9 B.8 C.14 D.16
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-26, -6, 2, 4, 6, () A.9 B.8 C.14 D.16
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-26,-6,2,4,6,() A.11 B.12 C.13 D.14
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2, 8, 4, 6, 3, ()。A.18 B.16 C.14 D.12