单项选择题
A.10110.0101111B.10010.01011C.10110.11010D.10010.010110
A.000101111000.0101B.010001111000.0101C.010010101011.1000D.010010101110.1001
A.进位输入:C inB.进位输出C outC.本位差:DD.本位和:S