问题
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:1/2,2/3,2/5,1/2,8/13,()。A.32/21 B.7/15 C. 9/11 D. 1
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:-1,0,-3,-2,-5,-4,()。A.-7 B.-9 C.-11 D.-13
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2/3,3/5,5/8,9/13,() A.2/3 B.5/7 C.16/21 D.17/22
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0,7/3,22/5,45/7,76/9,()A.12 B.13 C. 106/11 D. 115/11
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1/2,2/3,2/5,1/2,8/13,()。A.32/21 B.7/15 C. 9/11 D. 1
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-1,0,-3,-2,-5,-4,()。A.-7 B.-9 C.-11 D.-13