Using an 8-bit allocation,first convert each of the following numbers to two's complement,do the operation,and then convert the result to decimal.19+23
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吸收式热泵由发生器、吸收器、冷凝器、蒸发器、节流阀及溶液泵等组成,其原理是利用由两种不同沸点的物质组成的溶液(也称工质对)的气液平衡特征进行工作。
A. 对
B. 错
【单选题】 ( )is a stand-alone storage location that holds data temporarily.
An ALU
B. A register
C. A control unit
D. A tape drive
【单选题】 ( )is a unit that can add two inputs.
An ALU
B. A register
C. A control unit
D. A tape drive
【单选题】A register in a CPU can hold ( ).
A. data
B. instructions
C. program counter values
D. all of the above