问题
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:1/2,1,9/8,1()A.23/16B.5/32C.25/32D.7/16
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1/2,1,9/8,1,()A.7/16B.5/32C.23/16D.25/32
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32 、 1/2, 2/4, 4/8,7/16,11/32,()A 16/64 B 1/4 C13/48 D 1/3
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1/2,1/2,1/2,7/16,11/32,() A.15/64 B.1/4 C.13/48 D.1/3
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2/31/22/51/32/7() A.1/4B.1/6C.2/11D.2/9
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1/2,1,9/8,1() A.23/16B.5/32C.25/32D.7/16