网络安全和国家安全论文范文英文版

Data Management1 why Data Management ? We have already considered hardware and software in some In this chapter， we turn our attention to a third basic computer resource， Many computer applications require that data be stored for subsequent [1] Simply storing the data is not enough， A typical computer system， even a small one， can have dozens of disks and tapes， each holding data for dozens of different For any given application， one and only one set of data will We must be able to store， Locate， and retrieve the specific data needed by a given That is the concern of data 2 Accessing DataImagine a single diskette containing several For a particular application， only one of those programs will How is a given program selected， loaded， and executed? In Chapter 6， we learned that the operating system， responding to a use’s command， reds the disk’s index， searches it for the requested program name， extracts the program’s track and sector address， and issues primitive commands to read it into main Later， following a RUN command， the program is given control of the Accessing data presents a similar A single diskette can hold data for several different For a given application， one and only one set of data will do， and finding the right data is much like finding the right There are differences between accessing programs and accessing data， When a program is need， all its instructions must be loaded into Data， on the other hand， are typically processed selectively， a few elements at Thus， it is not enough merely to locate the data; we must be able to distinguish the individual data elements， 1 Data Structures The key to retrieving data is remembering where they are stored， If the data elements are stored according to a consistent and well understood structure， it is possible to retrieve by remembering that The simplest data structure is a For example， data for a program that computes an average might be stored as a series of numbers separated by commas (F1) The commas distinguish the individual data Most programming languages support amore complex data structure called an array (Fig 2) Each array element can hold one data Each element is assigned a unique identifying number or numbers， and individual data elements can be inserted， extracted， or manipulated by referencing those For example， in the array pictured in F 2 elements are identified by a row number and a column number， and row 1， column3 (element1，3) contains the value Once an array has been filled， it can be written to disk， tape， or any other secondary medium， and back into memory for Consider a program that generates name and address For each label， we need a name， a street address， a city， a state， and a zip If we needed only a few labels， we might store the data in a list， but separating the elements would soon become An option is to set up an array of names and addresses， with each row holding the data for a single The only problem is that the entire array must be in main memory before the individual elements can be accessed， and main memory space is Thus， even with an array， we could generate relatively few F 1 The simplest data structure is a Separators， such as these commas， serve to distinguish individual Often， a “sentinel” value， such as a negative number， marks the end of the 4410， 843， 184， 31， 905， 6357， 44， 7702， 228， 59， -1 F 2 Most programming languages support a more complex data structure called an array Individual cells are assigned a number or numbers， and data values are inserted manipulated， and extracted by referencing those A better solution is to organize the data as a file (F3) All computer data begin as patterns of bits， On a file， the bits are grouped to form Groups of characters， in turn， form meaningful data elements called A group of related fields is a record the file is a set of related For example， in a name and address file， an individual’s name is a Each record holds a complete set of data for data for a single individual ( a name， a street address， and so on) he file consists of all the Fig 3 Characters are grouped to form Fields are prouped to form A file is a group of related The data in a file are processed record by Normally， the file is stored on a secondary medium such as Programs are written to read a process its fields， generate the appropriate output， and then read and process another Because only one record is in main memory at a time， very little memory is Because many records can be stored on a single disk， a great deal of data can be processed in this limited 2 Locating Files Imagine a file stored on The first step in accessing its data is finding the The task is much like finding a program， but there are Following a command such as LOAD or RUN， programs are loaded by the application Data， on the other hand， are processed by application programs， in the context of a program’s Typically， just before the data are required， the program asks the operating system to open the Each file has a name; the open logic ( 4 ) reads the index， searches it by name， and finds the address of the first record in the F4 when a file is opened， the disk index is read into main memory and searched for the desired file’s If the file name is found， the file’s start address is extracted from the 3 Locating Records Once a file has located， the process of accessing its records can When a program needs input data， it reads a record; when it is ready to output results， it writes a Note that these instructions deal with selected records， not with the entire We open We read and write Let’s examine the data accessing process more A programmer views data logically， requesting the next record， or the name and address for a particular The data are stored on a secondary medium such as To access a record physically， the disk drive must be give a set of primitive commands: seeks， reads， and The programmer thinks in terms of logical I/O The external device stores and retrieves physical sectors; it “thinks” in terms of physical I/O There must be a mechanism for translating the programmer’s logical requests to the appropriate physical commands (Fig 5) On small computers， much of the logic is found in the operating system’s input/output control system; on larger machines， access methods are Increasingly， the programmer’s logical data request is translated to physical form by a database management 4 The Relative Record Concept How does software， be it operating system， access method， or database software， find specific records in a file? [2] The key to many storage and retrieval techniques is the relative record Imagine a string of 100 Numbers indicate a given record’s position relative to the first record in the The file’s first record ( relative record 0 ) is at “ start of file plus 0 ”;Its second record is at “ start of file plus 1”， and so Access Methods Imagine preparing meeting announcements for a You need a set of mailing labels， and each member’s name and address is recorded on an index Probably the easiest way to generate the labels is to copy the data from the first card， turn to the second card and copy it， and so on， processing the records sequentially， form the beginning of the file to the Magazine publishers face the same problem with each new issue， but need mailing labels for tens of thousands of Rather than using index cards， they store customer data on disk or magnetic tape， one record per The easiest way to ensure that all labels are generated is to process the records in the order in which they are stored， proceeding sequentially from the fist record in the file to the To simplify handing， the records might be presorted by zip code or a mailing zone， but the basic idea of processing the data in physical order still How dos this relate to the relative record number concept? A relative record number indicates a record’s position on the With sequential access， processing begins with relative record 0， then moves to relative record 1， 2， and son Accessing data sequentially involves little more than For example， imagine a program has just finished processing relative record What is the next record? Obviously， relative record We’ve already seen how a relative record number can be converted to read them， or write them， in physical Processing records in sequence is not always For example， when a subscriber moves， his or her address must be changed in the fire searching for that subscriber’s record sequentially is like looking for a telephone number by starting with the first page of the telephone book and reading line and That’s no how we use a telephone Instead， knowing the record are stored in alphabetical order ，we quickly narrow our search to a portion of a single page and then begin reading the entries， ignoring the bulk of the data the way we use a telephone book is good example of direct， or random， A disk drive reads or writes one record at a To randomly access a specific record， all the programmer must do is remember its address， and ask for it the problem is remembering all those disk addresses， One solution is maintaining an index of the Again， we’ll use the name and address fire as an We want to access individual customer record by As the file is created， records are written one at a time， in relative record number Additionally， as each record is written， the customer name and the associated relative record number are recorded in an array or After the last record has been written to disk and its position recorded on the index， the index is itself Once the index has been created， it can be used to find individual Assume， for example， that Susan Smith has changed her To record her now address on the file， a program read the file index， search the index for her name， find her relative record number， compute the disk address， and read her record， change her address， rewrite the record to the same place on Note that this specific record is accessed directly， and that no other records in the file are The basic idea of direct access is assigning each record an easy to remember， logical， and then converting that key to a relative record number， Given this relative location， a physical address can be computed， and record Using an index is one technique for converting keys to physical An option is passing a numeric key to an algorithm and computing a relative record Both techniques have the same objective; converting a programmer’s logical data requests to physical Earlier in the chapter we identified the gap separating logical and physical I/O An access method is a software module that bridges this gap， converting logical keys to physical addresses， and issuing the appropriate primitive There are many variations of sequential， indexed， and direct organizations， and each one has its own access Using a variety of data access techniques can be confusing， and this is one reason for the growing popularity of database management systems4 Database Management There are problems with traditional data Many result from viewing applications For example， consider Most organizations prepare their payrolls by computer because using a machine instead of a small army of clerks saves Thus， the firm develops a payroll program to process a payroll file， Inventory， accounts receivable， accounts payable， and general ledger analysis are similar applications， so the firm develops an inventory program， and inventory file， an accounts receivable program， an accounts receivable file， and so Each program is independent， and each processes it own independent data Why is this a problem? For on thing， different application often need the same data For example， schools generate both bills and student grade View the applications The billing program reads a file of billing data， and the grade report program reads an independent file of grade The outputs of both program are mailed to each student’s home; thus， student names and addresses must be redundantly recorded on both What happens when a student moves? Unless both file are up data， one will be Redundant data are difficult to A more subtle problem is data Each access method has its own rules for storing and retrieving data， and certain “tricks of the trade” can significantly improve the efficiency of a given Bacause the motivation for using the computer is saving The programmer is often tempted to save even more by taking advantage of these Thus， the program’s logic becomes dependent upon the physical structure of the When a program’s logic is tied to its physical data structure， changing that structure will almost certainly require changing the As a result， programs using traditional access method can difficult to The solution to both problems is often organizing the data as a single， integrated The task of controlling access to all the data can then be concentrated in a centralized database management How dose the use of a centralized database solve the data redundancy problem? All data are collected and stored in a single place; consequently， there is one and only one of any given data When the value of an element ( an address， for example) changes， the single database copy is corrected， Any program requiring access to this data element gets the same value， because there is only on How dose a database help to solve the data dependency problem? Since the responsibility for accessing the physical data rests with the database management system， the programmer can ignore the physical data As a result， programs tend to be much less dependent upon their data， and generally much easier to Expect the trend toward database management to There are problems with traditional data Because different applications often require the same data， certain data elements may be stored in several different places， and such redundant data are difficult to Another problem is data If a program’s logic is too closely linked to the physical structure of its data， that program can be difficult to The solution to both problems is often collecting all the organization’s data in a centralized With a database， there is only one copy of each data element， so the data redundancy problem is Because every program must access data through a database management system， programs are insulated from the physical data structure; thus， data dependency is

你在百度搜索不到吧你到谷歌里去搜索Network Security（网络安全）的文章一艘一堆翻译嘛用翻译软件几分钟搞定

With the development of computer technology and network technology， network security issues， today has become one of the most attention to the problem of the network world Many factors， which endanger the safety of the network， they mainly attached to the various malware， including viruses and trojans is most general Internet users are familiar According to these harmful factors， network security technology rapid development， it also greatly improved the security of the Aiming at network security situation now， on the company's network information security are analyzed and put forward the improvement Keywords: physical security， intrusion detection， firewall， switch， router

可以直接google里面打中文自动翻译如果你连这3000千字都不想打你连这4年父母辛苦给你的学费都是糟蹋

网络安全与国家安全论文范文英文版

可以直接google里面打中文自动翻译如果你连这3000千字都不想打你连这4年父母辛苦给你的学费都是糟蹋

论文不会写，最关键的是要把心态放正，一步步来，多看点范文，看看别人怎么写的，实在不会可以找别人代写，我以前也一样，最后找的NTA 。NTA这个站做的，质量还可以，顺利通过了，希望对你有帮助

看见这种问题就烦现在大学生都怎么了。我是中专毕业的。我的毕业设计我自己做了半年。我感觉真的受益匪浅。劝你也放弃拿来主义吧。多掌握点东西绝对没有坏处。

网络安全和国家安全论文范文

安全伴我行安全，牵系着每一个人的生活。每当我走在上学、放学的路上，看到“车水马龙”，“人山人海”的热闹景象，看到身边飞驰而过的车辆，心里就会产生恐惧感。眼前浮现的一幕幕车毁人亡的画面，让我感到害怕。每当想到这里，我就十分紧张，真害怕第二天遇到车祸的就是我。大家可能看到过这样一个报道：2005年11月14日，是个阳光明媚的日子。山西沁源县第二中学的几百名师生正在马路边跑操，突然间，一辆大货车象一个发疯的恶魔碾向跑操的队伍，随着一片片惊呼和惨叫，21个鲜花般的生命永远的离开了这美好的世界。许多家长听到噩耗传来，一路上呼唤着孩子的名字，奔向现场，可是，任凭大人们怎样撕心裂肺地呼喊，他们永远也不能回应。这血的教训，给多少家庭带来痛苦，把多少幸福的家庭拆散。我国是一个人口大国，人多车多，使道路显得更加拥挤。据统计，我国每年因车祸死亡人数超过10万人，其中，儿童死亡人数近2万人，居世界之首。平均每5分钟就有1人死于车祸，而不到半小时就有一个孩子葬身车轮，这是多么惊人的数字。在这触目惊心的数字背后，有多少个家庭失去欢乐，多少个亲人痛不欲生，多少个生命之花永远凋零。想到这些，我抑制不住内心的激动，为遇难者留下同情的泪水，对肇事者产生无比的愤慨！然而，这些事故的发生，绝大多数都是因为人们的交通安全意识淡薄，不遵守交通法规造成的。作为一名合格的中学生，我们理应积极行动起来，从我做起，从身边做起。因此，我倡议：①全体同学要认真遵守《中学生守则》、《中学生日常行为规范》和交通法规。②校内文明守纪，楼道内轻声轻步，绝不打闹，不做危险的游戏。③校外一定要注意交通安全，走路要走人行道，过马路要走斑马线，不要翻越护栏。十字路口一定要看清红绿灯。④马路上行走时要集中精力，不看书、不听音乐、不打闹。“红灯短暂，生命无限”、“不怕百步远，只怕一步险”。其实，前人发明红绿灯是有原因的，不要怕麻烦，有句话说的好“红灯无数次，生命只一次”，红灯会闪烁无数次的，而生命只有一次，用完了就没有下一次了，在红灯没有灭的时候，我们绝对不可以冒险过马路，哪怕两边没有车，也绝对不能穿过马路。因此，同学们千万不要在马路上打闹，这样太危险。还有的惨剧是行人翻越护栏造成的，大家要不怕麻烦绕过护栏。为了我们的生命之花永远绽放，为了让所有的家庭幸福美满，亲爱的同学们，让安全永远伴随你我他吧！

网络有好有坏，好的是能帮助你的拼音能力；坏的呢，会使你整天沉迷于网络，使你成绩大大降低；所以我们要适当的利用网络，好的当然少不了。坏的当然也可以玩。但是要合理的安排时间，如果你但是做好的，那会给自己造成压力的。2在我读五年级的时候我哥哥买

回答您好，您的问题已看到，正在为您解答，请稍等。我是百度特邀答主，擅长解答有关教育领域的各种问题很高兴为您服务 现在是资讯科技的时代，但是网络中还是隐藏着无限的危机，因此“网络安全”已经变成每个人都应该重视的事情了。像为了确保个人资料不外漏，我们应该做好安全措施，才不会使个人资料、照片…等重要资料让别人知道，虽然网际网络带给我们很大的便利，但是也有许多人使用木马、病毒…等各式各样的诈骗以及威胁资讯安全的方法盗取别人的重要资料，所以为了保障个人的重要资产，我门应做以下措施，以确保资料安全：1、电脑不用时要注销2、个人资料应备份3、浏览网络要小心4、电子邮件要过滤5、不明网站不乱开6、软体使用要版权，如果做好以上措施，就可以让重要资料多一份保障哦！还有许多人会使用网络进行资料查询、交作业、工作或聊天…等事情，但是这些人不见得是使用正确得方法去使用电脑，也有一些人很会用电脑玩游戏和写报告，可是，如果没有适当的使用电脑，就很有可能造成反效果哦！还有还有，现在不论文字、影音、图片…等都可以在网络上快速传送，是知识财产权更容易受到侵犯，知识财产权的范围非常广，包括：图片、音乐、影音软体…等等，因此在引用时，应取的作者的授权哦！为了安全起见，上网一定要小心，浏览页面时也要谨慎，如过做到以上叙述的事项，就可以保障自己的权利，也不会触犯到法律网络已经融入到我们生活之中，是我们信息交流不可缺少的工具，给现代的文化科技做出了很重要的贡献。我们这一代人必须要懂电脑，会电脑。但是它也不是那么“忠诚”，会给我们带来很大的危害，我们只有用的好，用得妙，才能达到理想的效果。首先，危害最大的就是游戏，在虚拟的游戏中，会因为游戏的好玩和自如而沉迷，无法自拔。从而对网络产生依赖。而且在网上任何人都模糊不清，任何错误无需承担，便随心所欲为所欲为。如果带到现实生活中那后果会不堪设想。而且上网时会遇到各种对我们不好的信息，会让我们在无意中受到伤害。长时间的玩电脑会对我们的身体造成不良影响。而且整天沉溺于网络，对学习产生了很大的影响，从而荒废了学生业。我们怎样才能从网络中找回自己呢？最重要的是家长，因为家长在孩子的身边的时候最多，家长应该多多正确的引导和监督，遇到问题与孩子多谈心好好沟通，其次，学校也应该多开展一些健康上网的活动，不仅娱乐而且还可以增长知识。我们也可以多参加一些有趣的活动，多读一些书。上网有利有弊，好好运用利大于弊，假如迷恋网络，便弊大于利，利弊就在一念之间，我们要好好的利用网络，让他成为我们的好助手，好朋友。而不是沉迷的工具。这个是两个范文您可以看一下希望对您有所帮助更多2条 

以少年之名，共筑网络强国梦作文写法有以下几点：1：开头结尾要简练，最好首尾两行半；2：作文首尾要打眼，丰富多彩出亮点；考试作文的开头方法很多：六要素开头法、题记开头法、悬念开头法、引名句开头法、排比句开头法、拟人式开头法、设问式开头法、对偶式开头法、博喻加对仗开头法、合用修辞开头法、巧述典故开头法、解题式开头法、名人问答开头法、诗文引用开头法。结尾很重要。一般来说，结尾是总结全文。如果是记叙文，要注意抒情。如果是议论文，则要注意归纳。无论如何，最好要扣准标题。正文网络，是高科技的产物，有人爱，也有人恨。爱它的人说：使用网络能感受现代科技的发达，能启迪人的思维，能开发人的智慧，能锻炼人的毅力；恨它的人说：使用网络，可使人沉迷其中，浪费时间，花费金钱，荒废学业，虚度光阴……而我要说的是：网络，让我欢喜让我忧。学生上网可以开阔视野、增长知识，原本是件好事。在网上学生了解社会，融入社会，跟上时代节奏，接触多方面的信息，丰富视野。毕竟“两耳不闻窗外事，一心只读圣贤书”的年代已经远去，尤其是目前社会需要能适应时代潮流的弄朝儿。网络更直观、形象、易懂。作为学生，在学业繁忙之余，需要一点时间放松自己、调理自己。网络集休闲、娱乐、学习场所于一身，此时在网络上学习，提高学习效果，何乐而不为？但中学生们要端正上网的动机，千万不要雾里看花，愿用你们的一双慧眼，把网络的利弊看得清清楚楚、明明白白、真真切切。网络本身代表着社会的进步、人类的发展，它给我们带来的是一座想象中的舞台，人们可以在这里扮演自己想扮演的角色，帅哥靓女漫天飞，性别年龄随你编。在网络的“戏剧”里，实话难以证实，谎话也不易穿帮，你敢不敢相信，“多情公子”、“迷幻娇娃”、这些让成人羞于出口的词语竟然是一些十几岁的孩子在网吧里上网聊天的自称？人来人往的网吧里，一位十几岁的女孩正坦然自若地跟网友大谈性经验？中学阶段是学习各种知识的黄金时期，如果过分迷恋于网上生活，无疑是虚度光阴，一个中学生一天上网吧10分钟，一个月就是300分钟，一年就是3600分钟，，这是多大的奢侈啊！高尔基说过：“世界上最快而又最慢，最长而又最短，最平凡而又最珍贵，最易被忽视而又最令人后悔的就是时间。”屠格涅夫说过：“没有一种不幸可与失掉时间相比。”时间对我们有多麽重要，上天赐给我们的时间是相同的。如何在有限的时间里成为有用的人，就要看每个人是怎样利用时间。如果全中国的学生们都迷上了电子游戏，都去网吧玩，网吧老板赚了大钱，可我们这拥有56个民族13亿人口的国家怎么办？没有懂得文化知识的人，没有科学家，就一定不会跟上前进的步伐。往长远看，在电脑上获取信息易如反掌，会使我们过分依赖电脑，把它当作解决问题的途径，我们会失去自己独立思考的能力。也许若干年后，问学生鲁迅是哪国人，他们会异口同声地说：“对不起，我的去电脑上查查。”这固然夸张，但是以让我们深思。“网络”，不要让它网住我们，网住我们的思想，网住这个社会。也许有一天，别的国家又研究出了比电脑更先进、更豪华的机器，而我们只能眼巴巴地看着，看着别的国家换上新的机器，看着别的国家把一台台电脑当做垃圾扔掉，而我们却还在摆弄那一台台对于我们像宝贝似的电脑。那时，我们就会像一只小蚂蚁，让人掌握，任人践踏，我们的头上又会出现那四个耻辱的大字——“东亚病夫”，我想同学们一定不希望自己的国家会变成我所说的那样。有的同学会说:“那是不可能的事!”没有什么不可能，要知道:“没有规矩，不成方圆。”如果同学们不离开网，那就是可能的。中学生们，赶快从网吧的泥潭中走出来，回到课堂中去，未来的社会不是靠几个游戏就可以创造的大千世界中还有许多的知识和许多的精彩在等待着我们。让我们用知识、用聪明才智去开创未来的网络时代吧！

网络安全和国家安全论文范文大全

NO1我们常常能听到上网、入网的话题，但大家知道网络安全与道德吗？虽说网络给我们的生活添了彩色的一笔，但我们也不能太沉迷于网络。有些人就偷偷摸摸地在网上搞一些对人们身体有害的网站，有些人明知道不好，但还是到网站里去玩。特别是中小学生这些处在发育转折期玩后，可能长大后会做出一些违法的行为，还可能终生受害。网络使我们的生活更加快捷方便，丰富多彩，但我们要学会用网络，像在网络上打打字，可以锻炼手指。画画图，可以使画图的本领提高。看看新闻，可以关心国家大事……这些都是很好的网络道德，为什么偏偏要在网上做一些不良的行为？会上网络的人很多，但会使用网络的人却不多。我们国家缺乏的并不是会上网络的人，而是会用网络的人。让我们竖立起网络安全与道德意识，携手共创美好的网络未来！NO2互联网是一张神奇的网，他把每个人的心都紧紧的扣在一起，因为有了这张网，人类的生活才会更美好。互联网给予我们大量的知识，让我们做到了“足不出户，晓知天下事”，真是快捷又方便。而这张神奇的网也有美中不足的地方，就是有一些不健康的网站会给人类带来一些不必要的麻烦。网络上有一些居心不良的坏人，因为青少年的好奇心强，他们会抓住这一点来引诱青少年们。甚至会发一些下流的信息。我在QQ上也有个号，那上面人特别多我都不知道加哪个。碰巧我的部分同学，老师，亲戚也有QQ号就加了他们。然后经他们介绍认识了一些好友。这也是一种不错的交友方法哦。也许你会在新闻里看到，某少年因见网友被骗多少多少钱，这也是常发生的事。在网上，有些人会假装自己很有学问来骗取别人的心，有的时候会约你见面，你可千万不要去，就算他是好人，不怕一万，只怕万一。网络道德也很重要，如果你想在网上交到知心朋友，就必须遵守网络道德，我也有过亲身经历。我在BBS论坛上注册了一个号，有一天，我先着无聊，就在论坛上乱发消息。论坛上的人很烦恼，很想把我踢出去，就对我说：“你在发就把你赶出去。”我才不信呢，继续，最后，还是被人踢了出去。只有注意网络安全，讲究网络道德，才能在网络上畅行无阻。让我们一起来建设一个文明的网络吧

安全在我身边安全对于每个人来说，都很重要，它直接与人的生命相关联。大到国际，小到个人，安全与危险就像隐行人又像空气，无处不在。危险好似死亡使者的魔掌，他会夺去我们宝贵的生命，而安全恰好是这只魔掌够不到的地方。没有人喜欢死，生命对于每一个人来说都是宝贵的，只有一次，不容有任何的疏忽和悔过。细心人很容易就会发现，世界上有许多魔掌够不到的地方，隐约中我们会感到安全其实离我们并不远，相反，安全就在我们身边。就拿放暑假的前一天来说吧。清晨在闹钟的不依不饶下，我睁开了睡意朦胧的双眼。就在我背上书包的一刹那，母亲的唠叨又开始奏起了“交响乐”。路上要小心，别骑的太快，看好了再过马路，别闯红灯。车多的时候，多等一会，跟着大家一起过……“妈呀！”我尖叫着跑进了电梯。路上清风吹来，让我清醒了不少。细看这平日要走几遍的马路，突然发现地上的分道线格外清晰，看来昨夜一定重新喷过漆了。看到这些，才引起了我对这条老路的特别关注。我这才发现，路上每一个路口都安了红绿灯，路中间的警亭很早就站上了忙碌的警察叔叔，这下想闯红灯可难了。一座又一座的过街天桥，被装饰的眼花缭乱，尽现北京人的热情。便道边种上了一棵棵绿葱葱的小树，盲道格外显眼。一路上，不难看到提示牌、广告栏上清楚地写着禁止翻越隔离栏、禁止乱停车、请走人行横道、请走过街天桥、请遵守交通法规等等。平时我没注意观察，看来这条路的变化还真大。来到学校，一想到要放长长的暑假，心里就不觉得快乐和轻松。这时，学校的广播响了起来：“请同学们坐好，现在我们要珍对暑期安全开个会。”唉，每年学校放假前都是这样的，对于我们这些已有九年学习经历的人来说，已是司空见惯了。“请同学们注意：假期不要去网吧、不要随意外出、不要到酒吧、歌厅等成年人娱乐场所，不要到没有安全措施的地方游泳，不要……要注意饮食卫生，要合理地安排好作息时间，要……”带着这一脑袋的要与不要，我们总算迎来了暑假…… 我想只用这一天，就足以证明安全在我们身边了。不管是从父母的叮嘱中，路边的广告上，还是广播、电视里的宣传，我们都看到了安全的提示。可每一年中，还有很多人死于车祸等意外事故，这怎么解释呢？我认为危险是可以避免的，关键在于你是否意识到。关于安全的提示，我们随处可见，如果你意识到了，你会继续快乐的生活；如果你开始没意识到，后来意识到了，那就相当于你被死亡使者发现了，但他够不到你；如果你始终对这些安全提示毫不在意，那么下一个被抓住的生命就是你的。揉亮我们的眼睛，看清善与恶；转动我们的大脑，分清是与非；记住：安全就在我们身边！仅供参考，希望能够帮到你。

网络信息安全与国家安全论文范文英文版

你在百度搜索不到吧你到谷歌里去搜索Network Security（网络安全）的文章一艘一堆翻译嘛用翻译软件几分钟搞定

需要的话我们团队也可以的原创按照要求定制包修改包过直到通过为止