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:1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
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1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
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2,10,19,31,52,()。A.111B.100C.85D.63
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2,10,19,31,52,()。A.111B.100C.85 D.63
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2,10,27,51,88, ()。A.111 B.125 C.136 D.142
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2,10,19,31,52,。A.111B.100C.85D.63
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从0 1 2 … 9这10个数中取出3个数 使其和是不小于10的偶数 不同的取法共有多少种?( ) A.50 B.51