单项选择题

某数值编码为FFH，若它所表示的真值为-127，则它是用（）表示的；若它所表示的真值为-1，则它是用（）表示的。

某数值编码为FFH，若它所表示的真值为-127，则它是用（）表示的。

A．原码
B．反码
C．补码
D．移码

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