计算机导论上机答案

Question 1A: a. your friend Jen is a native French speaker who has immigrated to the United States toteach French in high school. She pays special attention to her students’ pronunciation and works very hard to show her students how to pronounce words correctly in French. Knowing that you are taking a course in computer systems, she asks if you know of any computer technology that can help her students learn to speak a foreign language with correct pronunciations. What would be your response to her?Dear, jenI have recixe your letter. I know you have some trouble in how to show your students correctly in French.There are two computer software may be useful to you. The first one is the how to pronounce words “The Talking Head”, it is a software can be used in language training. The Talking Head realistically simulates the head of a human being, with a computer-synthesized voice that sounds human-like. The voice of the talking head is very lifelike. I think it will give your students more chance to exercise their spoken—french .The second software is Fluency: Automatic foreign language pronunciation training software. It can interpret pronunciations and provide feedback on how we pronounce a word and how to correct the pronunciations. I think it will help your student exercise the pronunciation.Best wishes!YoursZhao GuopingB: Your uncle has worked for 30 years as a sales representative. He has accumulated over 10,000 business cards throughout his career. He keeps a stack of notebooks where he writes down each customer’s contact information, profile, and special interests. When making customer contacts, he spends a large amount of time trying to identify the target group of customers. Describe an easier and faster way of organizing the information he has collected making use of availabletechnology.I suggest my uncle use Customer relationship management software. A CRM software system can collect information about customer demographics, and investigate customer-purchasing behaviors with the objective of predicting customer needs and increasing revenues. So, I think the CRM software ware helps my uncle organizing the information he has collected.C: Your friend Alex is tasked to generate a number of series of posters of the same picture varying in poster size, color tone, and layout for a class project due in 5 hours. He is very frustrated because each poster design would take him about 3 hours to produce with color pencils. How could software be used to solve this problem?She can use Graphics software. It is designed to help create, manipulate, and print graphics. Here I will give her five software, Paint software、Photo editing soft ware , Drawing software,3D graphics software, CAD software and Presentation software. I think this software will help her to solve her problems.Question 2A: a. Complete the following chart by converting the numbers given in one of the notations to the other two. Show calculations.B: What is the minimum number of bits that can be used to represent the decimal number 213? (Hint: convert 213 to binary.)8bitsC: What is the minimum number of bytes that can be used to represent the decimal number 213?1byteD: What is a purpose of using hexadecimal notation?It takes more digits to express a value in binary notation than inHexadecimal notation. And Computer professionals have adopted hexadecimal notation as shorthand for binary so that they can express binary values more concisely.E: What is ASCII code?America Standard Code for Information Interchange code.Question 3You can obtain the binary representation of a word by concatenating the ASCII values of each letter. For example, “SSD2” in binary representation is 01010011 01000100 00110010.a. “Fun” in binary representation is 01000110 01110101 01101110.b. “Play” in binary represen tation is01010000 01101100 01100001 01111001, which is equivalentto1349280121 in decimal representation.c. 01100011 01100001 01110010 01100101 01100101 01110010 01110011 is the binary representation of the ASCII string careers.d. 0x7374617274 is a hexadecimal representation of the ASCII string start.e. 1751478885 is the decimal representation of the ASCII string here.7:43 | 添加评论 | 固定链接 | 写入日志 | 计算机与InternetMain boardMain boardBrief introduction : The main board is one of the most important parts in the computer, and the foundation that the whole computer works. In general, the main board is made up by several following parts: Memory slot of CPU slot [the socket ], high-speed land bus , office of buffer memory , expand bus hard disk , floppy drive , clusters of mouth , and substandard to set up interface clock and CMOS main board BIOS control the chip mouth.Memory slot: Let me come to see memory again, the memory can be divided into two kinds, one is RAM, named and read and written the memory at random, can read and can write , the content can't be kept after cutting out. Another kind is ROM, call the read-only memory , can only read and can't write into , the content will not be lost after cutting out, this BIOS chip on the main board is ROM chip; Present BIOS chip on most main boards uses FLASH ROM, can wipe ROM written with the software, can be written into the content under higher voltage, this BIOS chip on the main board is. There are many kinds of RAM, the common one is dynamic RAM and static RAM. We say usually how much memory the computer is furnished with , it is dynamic memory to point. Here, we mainly have a look at the slot of the regularmemory, there are two kinds of mainly to use troughs of one of regular memory on the main board at present, the most new-type one is called DIMM trough . There is the one a bit older that is called SIMM trough .Has had memory of DIP and SIP type, they all insert pulling out type, it is apt to cause damaging , now has already been eliminated. DIMM present main boards of the above of surging forward will all offer DIMM trough , it is Line 168, used for installing SDRAM. SDRAM Chinese meaning is the synchronous dynamic memory, it has on good termser performance than ordinary DRAM. DIMM memory should insert the memory in the socket , the card reed to be pushed both sides while removing vertically while installing, the memory will have been lifted out the socket. Should pull out with hand help when the socket is too tight, so as not to damage the card reed. Though SIMM offer main board , SIMM of trough see seldom already now, but we can't yet forget this person make " friend " of great merit for computer development temporarily.SIMM troughs that can see now are all Line 72, and usually 4. Both ends of SIMM trough have spring slice , play the function of one of the regular memory. It is very easy to install SIMM memory , inlays mouths in the one of one's end of memory , so can only install in a correct way , put sloping into the notch it, then push to the correct position, the clip of both ends will lock it . It must push the card reed in both sides to remove SIMM one. Buffer memory: Usually Cache that people say refers to buffer memory SRAM. SRAM calls the static memory, " static behavior " is meant after we write a sum of data into SRAM, unless write into the new data or close the power again, the data written into keep intact.Because the speed of CPU is much quicker than the speed of the memory and hard disk, will make CPU wait while depositting and withdraw the data, influence the speed of the computer. The access of SRAM is all quicker than other memory and hard disk in speed, so it is used as the high-speed buffer memory (Cache ) of the computer.There is high-speed buffer memory , can write the data among them in advance first , read from it directly while needing, this has shortenned the waiting time of CPU. It is on the basis of a kind of statistics law that the high-speed buffer memory can improve the systematic speed , control system of main board will which data can frequent use in the automation statistical memory, store these data in the high-speed buffer memory, when CPU should visit these data, look for when will reach Cache first , thus improve the speed of operation of the whole . Generally speaking, the high-speed buffer memory of 256K can make the speed of the complete machine improve by about 10% equally .Will all usually offer 256K buffer memory to 1M on the main boards. There is high-speed buffer memory too within CPU, for instance, 486CPU has high-speed buffer memory of 8K, Pentium has high-speed buffer memory of 16K. Pentium II has 32K first class buffer memory, there is first class Cache of 64K in AMD K6-2, there is first class Cache of 64K in AMD K6-3, with second Cache of 256K , there is Cache of 64K in Cyrix MIIThe bus and CPU temperature survey the deviceBusSum up: Besides CPU type supported, the second important characteristic of the main board is a type of the bus . The so-called bus joins CPU and memory , buffer memory , outside and controls the data passway among the chip; There are data passways between the troughs to control the chip and expand , is named: Expand buses , or some bus. Expand the functionthat the bus allows users to expand the computer through installing the new expansion card . For example you might think installation sonic card is it increase voice function to come , installation network card comes to join the network. The more expansion troughs on the main board are, the more expansion cards that users can install are. Usually each main board offers 5-8 to expand the trough , they may be different bus types. Expand to have needle , with insert connector edge , board of card keep in touch it on one side while being every trough.ISA and PCI bus: The most ordinary bus is a ISA bus , namely the structure bus of industrial standard. 16 persons of ISA bus frequency, for about 8MHz. Its application is in a very large range, almost all the main boards have kept the expansion trough of ISA bus . PCI is a set of some buses system that Intel Company developed , it supports the width of bus of 32 or 64, frequency is usually 33MHz. The fastest PCI2 at present. 0 total linear velocity is 66MHz. PCI bus allows ten to connect the plug-in package, at the same time it still supports and uses simultaneously.CPU temperature surveys the deviceSurvey the device and can see on some main boards of SLOT 1 , it is a metal shell fragment in temperature of CPU, install it by CPU slot, after installing CPU well, its close contact of fin with CPU, in this way it can perceive CPU present temperature at any time , temperature manages the chip in addition, it will reduce the speed of operation of CPU when the temperature of CPU is too high , accelerates CPU fan turning.Interface on the main boardBrief introduction : All main board IDE interface, floppy drive interface, serial mouth, walk abreast mouth integrate at the main board at present, other some main board also built-in sonic card , display card , function , SCSI of interface.As to the thing that AT structure surges forward in the integrated interface of the main board, we prove one by one: Main IDE interface , packs of IDE interface floppy drive interface walk abreast interface , is it type mouth two these serial interface to call too, one is COM1, another one is COM2, they are usually used in serial mouse and modem ,etc..The main board of new-type ATX structure, the combining the mouth, one bunch of even sockets of it is integrated on the main board, and there are mouse of PS/2 and keyboard interface , has offered USB interface , namely the serial bus in common use , there is a detailed introduction behind 。