云南开放大学计算机专业英语(20秋)形考作业2-答案

1、云南开放大学-计算机专业英语（20秋）形考作业2试卷总分:100 得分:100一、单选题 (共 5 道试题,共 50 分)1.Hard disk drives , floppy disk drives and _drives serve as both input and output.A.Optical magneticB.keyboardC.mouseD.optical disc 参考答案:D2.Some computers are designed to_ their work across several CPUS in a multiprocessing configuration.

2、A.distributeB.distributedC.distributingD.distributes 参考答案:A3.A general purpose computer has four main components: the arithmetic logic unit (ALU),_, the memory, and the input and output devices (collectively termed I/O).A.the control unitB.mouseC.displayD.disc 参考答案:A4.In almost all modern computers,

3、 each memory cell is set up to store binary numbers in groups of_ (called a byte).Each byte is able to represent 256 different numbers (28 = 256); either from 0 to 255 or -128 to +127.A.One bitB.two bitsC.eight bitsD.eight bit 参考答案:C5.One means by which this is done is with a special signal called a

4、n _ which can periodically cause the computer to stop executing instructions where it was and do something else insteaD.A.pauseB.stopC.interruptD.exit 参考答案:C二、阅读理解 (共 1 道试题,共 50 分)10.A general purpose computer has four main components: the arithmetic logic unit (ALU), the control unit, the memory, a

5、nd the input and output devices （collectively termed I/O). These parts are interconnected by buses, often made of groups of wires.Inside each of these parts are trillions of small electrical circuits which can be turned off or on by means of an electronic switch. Each circuit represents a bit (binar

6、y digit) of information so that when the circuit is on it represents a “1”, and when off it represents a “0” (in positive logic representation). The Circuits are arranged in logic gates so that one or more of the circuits may control the state of one or more of the other circuits.The control unit, A

7、LU, registers, and basic I/O (and often other hardware closely linked with these) are collectively known as a central processing unit (CPU). Early CPUs were composed of many separate components but since the mid-1970s CUPs have typically been constructed on a single integrated circuit called a micro

8、processor.The control unit (often called a control system or central controller) manages the computers various components; it reads and interprets, (decodes) the program instructions, transforming them into a series of control signals which activate other parts of the computer. Control systems in ad

9、vanced computers may change the order of some instructions so as to improve performance.(1).A general purpose computer has four main components: the arithmetic logic unit, the control unit, _, and the input and output devices.A.mouseB.the memoryC.displayD.disc 参考答案:B(2).If the circuit is on, it repr

10、esents a _(in positive logic representation).A.1B.0C.onD.off 参考答案:A(3).The central processing unit is composed of _ components.A.threeB.sixC.fourD.five 参考答案:C(4).the control unit can not _.A.read the program instructions.B.transform the program instructions into a series of control signals.C.print d