计算机专业英语课后答案清华大学出版社第二版Word格式.docx

1、Computers are usually classified into four broad categories: microcomputers, minicomputers, mainframe computers and supercomputers.II Fill in the following blanks. 1. Application software is designed to accomplish real-world tasks in fields.2. An 8-bit signed integer can have any value between -128

2、and 127 3. System software controls the computer and enables it to run the hardware and applications software.4. A computer system consists of hardware system and software system .5. List four types of computers: microcomputers, minicomputers , mainframe computers,and supercomputers .III True or Fal

3、se. 1. The software system is the physical equipment that you can see and touch. 1.F2. Typically, a data value is set to zero to represent FALSE and 1 value forTRUE. 2. F 3. In the earliest general-purpose computer, most input and output media were magnetic disks. 3. F 4. Supercomputers are largest,

4、 fastest, and most expensive computer available.4.T5. A computer system consists of hardware system and software system. 5. T IV Matching terms. 1、（b） CPUThe processing unit is at the heart of a computer.2、（c） bit A unit of information conveyed by a single binary digit.3、（a） integrated circuit （IC）A

5、 complete electronic circuit that packages transistors and other electronic components on a small silicon chip.4、（d） ASCII A system for encoding characters as binary digits. V Translating Terms. （1） coding techniques 编码技术 （2） application software 应用软件 （3） floating point data 浮点数据（4） timesharing 分时，分

6、时技术 （5） storage capacities 存储容量VI Choose the best one of the four answers given to fill in each blank.This chapter introduces digital computer, data types, the evolution of computers, and types of computers. 1 is known to all, its hard to find a field in 2 computers are not being used. Digital compu

7、ter, also called electronic computer or computer, is a digital system that 3 various computational tasks. Digital computers use the 4 number system, which has two digits: 0 and 1.By using various coding 5 , groups of bits can be made to represent not only binary numbers 6 other discrete symbols, suc

8、h as decimal digits or letters of the alphabet. A computer system consists of hardware system and software system. Programs tell the hardware what to do. 7 software is designed to accomplish real-world tasks in fields such as accounting, entertainment, and engineering. Computers are usually 8 into f

9、our broad categories: microcomputers, minicomputers, mainframe computers, and supercomputers. Its hard to give a 9 definition to each type because computer speeds and storage 10 change rapidly.1. A. As B. It C. As it D. That2. A. what B. which C. where D. when3. A. performs B. carries C. makes D. in

10、tegrates4. A. decimal B. binary C. Arabian D. American5. A. technique B. Technology C. techniques D. technologies6. A. instead of B. rather than C. but also D. as well7. A. Application B. System C. Word D. Excel8. A. put B. made C. conducted D. classified 9. A. precious B. progress C. proceeding D.

11、precise10. A. capacities B. capable C. capabilities D. capacity1.A 2. B 3. A 4. B 5. C 6. C 7. A 8. D 9. D 1 0.C VII. Translate the following into English.1. By using various coding techniques, groups of bits can be made to represent not only binary numbers but also other discrete symbols. 通过应用各种编码技

12、术。一组二进制不但可以表示二进制数据，而且还可以表示其他离散符号，如十进制数字或字母表中的字母。2. System software includes not only the complex programs used by technicians to create application software in the first place but also the organizational programs needed to start up the computer and govern its use of other programs. 另一方面，系统软件控制计算机系统，

13、它不仅包括专业人员用于创建应用软件的复杂程序，而且还包括用于启动计算机和提供给其它程序使用的管理程序。3. Data are numbers and other binary-code information that are operated on to achieve required computational results. 数据是数字和其他二进制代码信息，这些二进制代码信息是可操作并能满足要求的计算机结果。4. 4. Rather than arithmetically or logically manipulating characters, a computer may con

14、catenate strings of characters, replace some characters with others, or otherwise manipulate character strings. 计算机能将若干字符连成串，而不是用算术方法或逻辑方法处理字符，用串代替其它字符或另行处理字符串。5. Software applications like word processing, electronic spreadsheets, database management programs, painting and drawing programs, desktop

15、 publishing, and so forth became commercially available, giving more people reasons to use a computer.软件应用像文字处理、电子表格、数据库管理程序、画图程序及桌面印刷等等起到一定的商业效力，使更多的人去使用计算机。第2章Computer System Organization1. What is a computer system?A computer system consists of hardware system and software system. The hardware of

16、 the computer is usually divided into three major parts or three primary subsystems: the CPU, the memory subsystem, and the I/O subsystem. The software system can be divided into two broad categories: application software and system software.2. How many levels of memory hierarchy do you know? Name a

17、t least three of them.The memory hierarchy system consists of three levels.They are a cache ,the main memory and the auxiliary memory.3. Identify the types of data transfer modes.Data transfer has three modes: programmed I/O, interrupts, and direct memory access （DMA）.1. The computer hardware consis

18、ts of three major parts which are the CPU, the memory subsystem, and the I/O subsystem. 2. There are two major types of memory: Random Access Memory （RAM） and Read Only Memory （ROM）.3. The cache memory in personal computers is constructed from SRAM4. input-output interface （I/O interface） provides a

19、 method for transferring information between internal storage and external I/O devices.5. Data transfer between the central computer and I/O devices may be handled in a variety of modes. These modes are programmed I/O, interrupts, and direct memory access （DMA）.IIITrue or False. 1.FThe data bus alwa

20、ys receives data from the CPU, and the CPU never reads the data bus.2.TMain memory holds whatever programs and data are available for immediate use by the CPU.3.FDynamic RAM does not have to be refreshed.4.FDot-matrix printer work by squirting tiny droplets of liquid ink at the paper.5.FThe auxiliar

21、y memory is very small, relatively expensive, and has very high access speed.IV Matching terms. 1、 E2PROM an electrically erasable PROM2、DMAA transfer mode that can be improved is the transfer of data between memory and I/O devices.3、ALU The unit which performs most arithmetic and logical operations

22、4、RAM Memory that is erased when the computer is turned off.V.Translating Terms. 1. system buses 系统总线2. virtual memory 虚拟存储器3. computer architecture 计算机体系结构4. instruction set 指令集 5. direct memory access 直接存储器存取VI. Choose the best one of the four answers given to fill in each blank.A computer system

23、1 of hardware system and software system. The hardware of the computer is usually divided into three major parts or three 2 subsystems: the CPU, the memory subsystem, and the I/O 3 . The CPU is made up of three major parts, Register Set, the 4 logic unit, or ALU, and Control Unit. It performs many o

24、perations and controls computer. Memory is also known as 5 memory or main memory, which is cataloged into two major types of memory: Random Access Memory （RAM） and Read Only Memory （ROM）.It refers to the 6 in the computer that hold whatever programs and data are available 7 immediate use by the CPU,

25、 along with the programs data. Computer systems include special hardware 8 between the CPU and peripherals to supervise and synchronize all input and output transfers. These components are called 9 units because they interface between the processor bus and the peripheral device. The I/O subsystem al

26、lows the CPU to 10 with input and output devices.1. A. Consists B. makes up C. Constitutes D. comprise2. A. premier B. Primary C. preliminary D. elementary 3. A. system B. machine C. subsystem D. device4. A. mathematic B. authorative C. Arithmetic D. authoritative5. A.external B.exterior C. Interior

27、 D. internal6. A. circuits B. wires C. lines D. hardware7. A.by B. for C. with D. in8. A.software B. setting C. listing D. components9. A. singular B.dual C. interface D. compact10. A.handle B. interact C. respond D. link 1. A 2. B 3. C 4. C 5. D 6. A 7. B 8. D 9. C 10. BVII Translate the following

28、into English.1. By asserting these internal and external control signals in the proper sequence, the control unit causes the CPU and the rest of the computer to perform the operation needed to correctly process instructions. 为了保证内部和外部控制信号的序列正确，控制单元保证CPU和计算机的其他部件提供需要正确执行的指令操作。2. In a computer with vi

29、rtual memory, less-used parts of programs are shifted from RAM to a hard disk and are moved back only when needed. 在使用了虚拟存储器的计算机中，很少使用的程序从RAM被移到硬盘中，仅当需要时才被移回来。3. A technique used to compensate for the mismatch in operating speeds is to employ an extremely fast, small cache between the CPU and main memory whose access time is close to processor logic clock cycle time. 为了弥补操作速度的不匹配，在CPU和主存之间采用非常快的小缓存，它的存取时间接近于处理器的逻辑时钟周期。4. The data transf