题目内容

虚拟变量的取值一般取0或1。

A. 对
B. 错

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假定个人服装支出与收入水平和性别有关，由于性别是具有两种属性（男、女）的定性因素，因此，用虚拟变量回归方法分析性别对服装支出的影响时，需要引入两个虚拟变量。

A. 对
B. 错

The8-bit twos complement 1001 0011 is stored in16-bit.It’s equal to____.

A. 1000 0000 1001 0011
B. 0000 0000 1001 0011
C. 1111 1111 1001 0011
D. 1111 1111 0110 1101

In twos complement, overflow may occur when ______.

A. two numbers with the same signadd
B. two numbers with the different sign subtract
C. AandB
D. multiply

Control unit use some input signals to produce control signals that open the gates of information paths and let the micro-operations implement. Which is NOT the input signals of control unit?

A. clock and flags
B. instruction register
C. interrupt request signal
D. memory read or write