问题
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4,12, 16,32, 64, () A.80;B.256;C.160;D.128;
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100 3/4,______,64 16/12,49 64/36,36 256/108 () A.81 4/5 B.81 5/9 C.82D.81
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计算1/4+3/8+7/16+15/32+31/64+63/128+127/256+255/512+511/1024=? A.3×(513/1024)B
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-2,1/2,4,2,16,()。A.32B.64C. 128D.256
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-1, 3, 12, 16, 64, 68, ()A.124 B.168 C.256 D.272
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-2,1/2,4,2,16,()。A.32B.64C. 128D.256
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