单项选择题
A.10100110 B.01001001 C.11011010 D.00100101
A.00110100 B.10110100 C.01001011 D.11001011
A.-1011010B B.+1011011B C.11011011B D.01011011B
A.1011011B B.01011010B C.11011011B D.+1011011B
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