问题
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1,1/2 , 6/11 ,17/29 , 23/38 ,()A.28/45 B.117/191 C.31/47 D.122/199
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:1/2,3/2,5/6,11/30,()。A.29/64 B.40/57 C.41/330 D.108/119
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-1,2,11,38,119,()。A.595 B.476 C.362 D.297.5
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1/2,3/2,5/6,11/30,()。A.29/64 B.40/57 C.41/330 D.108/119
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1/2,8/11,5/6,8/9A.31/34.B.33/36C.35/38D.37/40
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-1 2 11 38 ( )。 A. 119 B. 133 C. 121 D. 117