题目内容

案例分析题计算机中的加、减运算常采用机器数的补码表示。已知二进制整数a=+100101，b=-11011，则a+b的补码表示是（），a-b的补码表示是（）。已知二进制整数a=+100101，b=-11011，则a+b的补码表示是（）

A. 00001010
B. 11010101
C. 00001001
D. 10000001

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案例分析题为了预防计算机病毒的感染，应当（）。用硬件预防计算机病毒的方法主要是（）。为了预防计算机病毒的感染，应当（）。

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A. move
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D. die out

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A. control menu
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C. title menu
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B. 中继器
C. 网桥
D. 集线器