In 1972, IBM introduced flexible diskettes as a medium for loading programs into mainframe Because the disks were so flexible, they were nicknamed floppy They are inexpensive, small, and easy to handle, store, and send through the Most computers have at least one floppy disk Floppy disks, also called diskettes, are available in two sizes: 5 and 25 For MS-DOS based computers, the 5-inch disks are available in 720-kilobyte (double - density), 44-megabyte (high - density), and 88-megabyte (extended - density) The 25-inch disks have a density of 48 tracks per inch, whereas high-density disks have a density of 96 tracks per Almost all 5-inch floppy disks have a density of 135tracks per The earliest models of floppy disks were single- The addition of another read/write head in the disk drive led to the use of double-sided floppy disk, and doubled the capacity of the Today, all floppy disks are double- If you examine a 5-inch floppy disk, you will see that a metal sleeve covers the read/write When you insert the disk into a disk into a disk drive, the metal sleeve slides back, exposing the read/write The read/write head of the floppy disk drive can position itself over specific Because of the metal sleeve and the rigid plastic casing, the 5-inch floppy disk is less vulnerable to damage than the 25-inch floppy To use the files or programs that are on a floppy disk, you must first insert the disk into a floppy disk Floppy disk drives are commonly referred to as the A drive and the B Check your computer manual to see which drive is A and which is B
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计算机，方面的英语论的
ink that what is making them achieve that success and then work on those areas and try to gain that
4000字给30分？
The computer is a wonderful They are already widely used in industries and in They are used in many Computers can do many kinds of For example, computers can helps us do maths problems Some problems are too hard for us to work them out, but computers A scientist can ask computers some questions, and the computers can answer on the
通常说到“世界公认的第一台电子数字计算机”大多数人都认为是1946年面世的“ENIAC”，它主要是用于计算弹道。是由美国宾夕法尼亚大学莫尔电工学院制造的，但它的体积庞大，占地面积170多平方米，重量约30吨，消耗近140千瓦的电力。显然，这样的计算机成本很高，使用不便。这个说法被计算机基础教科书上普遍采用,事实上在1973年根据美国最高法院的裁定,最早的电子数字计算机,应该是美国爱何华大学的物理系副教授约翰·阿坦那索夫和其研究生助手克利夫·贝瑞Clifford E Berry ，1818-1963）于1939年10月制造的"ABC"(Atanasoff- Berry-Computer）。之所以会有这样的误会，是因为“ENIAC”的研究小组中的一个叫莫克利的人于1941年剽窃了约翰·阿坦那索夫的研究成果，并在1946年时，申请了专利。由于种种原因直到1973年这个错误才被扭转过来。（具体情况参阅百度百科----“约翰·阿坦那索夫”词条，希望大家记住ABC和约翰·阿坦那索夫，希望以后的教科书能够修改这个错误）。后来为了表彰和纪念约翰·阿坦那索夫在计算机领域内作出的伟大贡献，1990年美国前总统布什授予约翰·阿坦那索夫全美最高科技奖项----“国家科技奖”。 1956年，晶体管电子计算机诞生了，这是第二代电子计算机。只要几个大一点的柜子就可将它容下，运算速度也大大地提高了。1959年出现的是第三代集成电路计算机。 最初的计算机由约翰·冯·诺依曼发明(那时电脑的计算能力相当于现在的计算器)，有三间库房那么大，后逐步发展而成。 从20世纪70年代开始，这是电脑发展的最新阶段。到1976年，由大规模集成电路和超大规模集成电路制成的“克雷一号”，使电脑进入了第四代。超大规模集成电路的发明，使电子计算机不断向着 小型化、微型化、低功耗、智能化、系统化的方向更新换代。 20世纪90年代，电脑向“智能”方向发展，制造出与人脑相似的电脑，可以进行思维、学习、记忆、网络通信等工作。 进入21世纪，电脑更是笔记本化、微型化和专业化，每秒运算速度超过100万次，不但操作简易、价格便宜，而且可以代替人们的部分脑力劳动，甚至在某些方面扩展了人的智能。于是，今天的微型电子计算机就被形象地称做电脑了。 世界上第一台个人电脑由IBM于1980年推出。IBM推出以英特尔的x86的硬体架构及微软公司的MS-DOS操作系统的个人电脑，并制定以PC/AT为PC的规格。之后由英特尔所推出的微处理器以及微软所推出的操作系统发展几乎等同于个人电脑的发展历史。Wintel架构全面取代了IBM在个人电脑主导的地位Usually when it comes to "the world's first recognized electronic digital computer" Most people thought that it was published in 1946 the "ENIAC", it is mainly used to calculate the By the University of Pennsylvania Moore School of Electrical Engineering-made, but it's huge in size and covers an area of more than one hundred and seventy square meters and weighs about 30 tons, consumed almost 140 kilowatts of Clearly, the high cost of such computers, the use of the This was a computer on the basis of widely used textbooks, in fact, in 1973 the US Supreme Court ruled that the first electronic digital computer, we should love the United States Department of Physics, University Associate Professor HEAtanasoff and his graduate student assistantClifford E Berry ,1818-1963) in October 1939 to create the "ABC" (Atanasoff-Berry-Computer) The reason why is there such a misunderstanding, because the "ENIAC" in the study group of people called Moakley in 1941 Atanasoffplagiarism of research results, and in 1946, applied for a Due to various reasons in 1973 until this error was (Refer to the specific circumstances of Baidu EncyclopediaAtanasoff ----" "term, I hope you rememberAtanasoff and ABC, the textbook can hope to change the error) Later, in recognition and commemoration of Atanasoffin the computer industry made great contributions in 1990, former US President George W Bush awarded Atanasoffthe highest technology award ----" US National Science and Technology A " In 1956, the birth of the transistor computer, which is a second-generation Just a few of the cabinets can be a bit more it, computing speed is greatly Emerged in 1959 is the third generation of integrated circuit The first computer by the invention of John von Neumann (then equivalent to the computer's computing power of the calculator is now), there are three big Treasury, the latter gradually 70s from the beginning of the 20th century, this is the latest stage of computer To 1976, by the large-scale integrated circuits and ultra large scale integrated circuit made of the "Craven on the 1st," the computer into the fourth The invention of ultra-large-scale integrated circuits, so that computer continuously towards smaller, miniaturized, low power, intelligent, systematic replacement of 20th century 90's, the computer to the "smart" development, manufacturing, similar to the human brain with computers, can be thinking, learning, memory, network communication and so The 21st century, is a notebook computer, and miniaturization and specialization, speed of operation per second over one million times, not only simple, inexpensive, and can replace part of people's mental and even expanded in some areas people I Thus, today's micro-electronic computer was called the image to the The world's first personal computers from IBM introduced in IBM introduced the Intel x86 hardware architecture and Microsoft's MS-DOS personal computer operating system and the development of PC / AT for the PC After the introduction by Intel microprocessors and Microsoft operating system introduced by the development is almost equivalent to the history of the development of personal Wintel comprehensive framework to replace the IBM personal computer in the leading position
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来自百度：DESIGN AND IMPLEMENTATION OF PRODUCTION PLANNING MANAGEMENT SYSTEM OF SURVEYING AND MAPPING PROJECTKEY WORDS: GIS，Design，Analysis，Application，Management，ProductionABSTRACT:With the development of photogrammetry and spatial information sciences, we have found many new methods to solve the technical problem in surveying and mapping But there is a little research on the project Traditional management method is complex and time- Now, we need use new technique to improve the management method for enhancing management Taking “National Western Surveying and Mapping Project on 1:50000 Topological Maps Blank Area” as an example, this paper focus on production planning The project is remarkable, not only the task and extent is tremendous, but also the staff and stuff are The Blank Area has atrocious weather and extreme All of the conditions increase the project management For reasonable planning and logical budget, we designed and realized a production planning management system to give the decision support to the This paper studies the system’s requirement analysis, system structure and function in INTRODUCTIONNowadays, Geographical Information Systems(GIS) are powerful and useful as means of information, visualization and research tools(Quan Bao,2004) Most GIS software is more suited to providing limited types of output than as a tool to support, at anything other than a superficial level, tactical or strategic decision-making To improve the usefulness of GIS as a decision support tool, two needs are First, decision-makers require methods that allow them to easily select alternatives across a number of relevant Second, it is necessary to explicitly recognize that most decision-making processes involve multiple Since problem solving id often characterized by multiple and conflicting objectives, methods that contribute toward more a completely aiding decision system are
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这个太难搞了！
内容提要：本文就机房管理中如何最大限度给学生提供个性化学习空间，如何更高效地管理机房计算机介绍了七种实用技术方法。关键词：硬盘拷贝、 硬盘还原、 网络拷贝、 多重引导、 虚拟光驱、终端服务、桌面共享摘 要： 机械制图与计算机辅助设计CAD整合式教学具有学用结合、提高教学效果及绘图效率、培养的人才适应社会需要等优点。本文就机械制图与计算机辅助设计CAD两门课程整合的教学改革进行探讨和研究。……关键词： 机械制图、计算机辅助设计CAD、教学改革、二维绘图、三维绘图
In recent years the firewall is one kind of protection computer network security technical measure which develops, is also uses the most widespread one kind of network security to protect the technology at The firewall is or a group implements the access control strategy the system, it may be the software, the hardware or software and hardware's union, its goal is provides to the network safekeeping of The firewall usually is located at between the internal network and the exterior network, may monitor, the control and the change the network service which flows between the interior and the exterior network; Controls the exterior computer to be possible to visit the interior the environment which protects, and determined the visit the time, the jurisdiction, the service type and the quality and so on, the inspection interior spreads the information, avoids the privacy information flowing out, achieves resists exterior invades and prevents the goal which the insider information divulges a This article proposed firewall's disposition in network security's importance, has explained the firewall ruleset is the firewall product security important
Internet is the largest international inter-net system at present, and it’s a uniform developing and running environment of computer applications including Al technology on the netware times,it opens up broad prospects for Al applications and it also supports strong power for Al This paper introduces survey of Internet and the action of promotion of it for Al development briefly,and discusses some Al applications and developing technology which are suitable on Internet,and some our relevent works are
参考文献：[1]中华人民共和国教育部．英语课程标准（实验稿）．北京师范大学出版社，2001版[2]黄远振．新课程英语教与学[m] ．福建教育出版社，119～139[3]林崇德．英语教育心理学[m] ．北京教育出版社，149～152[4]李庭乡．英语教学法[m] ．高等教育出版社，95～98好感动哦，找半天终于找到了，这个对我来说真的好难，不知道对不对哦，希望能对你有帮助。哈哈