单项选择题
A.00110100 B.10110100 C.01001011 D.11001011
A.-1011010B B.+1011011B C.11011011B D.01011011B
A.1011011B B.01011010B C.11011011B D.+1011011B
A.0110 0110 B.0001 0001 C.1001 1001 D.1000 1000
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