问题
单项选择题
What is the decimal value of the following 8-bit two's complement number ( )1111 1001
A．-7
B．-3
C．3
D．7
答案
参考答案：A
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What is the decimal value of the following 8-bit two's complement number ( )1111 1001
A．-7
B．-3
C．3
D．7
参考答案：A