单项选择题
A.10010110 B.01101001 C.11101010 D.00010101
A.01110000 B.11110000 C.00001111 D.10001111
A.01000010 B.11000010 C.+1000010 D.-1000010
A.1011011B B.+1011011B C.11011011B D.01011011B
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