在微型计算机中，负数常用（）表示。
A．原码
B．反码
C．补码
D．真值
参考答案：C
As a reward ______ his contribution ______ botany, John Banks had a flower named ______ him
A．for, for, for
B．for , to , after
C．for , for , after
D．of, to, for
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