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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3 2 11 14 27 ()A.34 B.32 C.30 D.28
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3,2,11,14,27,() A.34 B.32 C.30 D.28
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3 2 11 14 27 () A.34 B.32 C.30 D.28
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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