问题
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:1,3,4,7,11,() A.14B.16C.18D.20
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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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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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1,3,2,4,2,7,4,11,(),()。A.6,19 B.8,18 C.10,20 D.16,22
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