【优质】网络与计算机的好处与坏处英文作文-范文模板
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网络与计算机的好处与坏处英文作文
In modern sociey, people who is handicaped in using computer and accessing network are classified as "blinds" naturally. The advantages of captioned facility is significant, the world move much faster than before because of the information exchange and speedy processing of data. You can guess how much business can grow if a spreadsheet need to be calculated using three days instead of one second nowaday, I should say in majority that computers and networking bring much convenience to human life. But there are still dark side of the world. I also observe children that cannot do simple calculation by mind, they have to rely on calculators, a simple form of computer, similar things happen all around us and when time goes by, we are weak in mind manipulation yet also weak in physical because we spent all time around the computer. What a world we are in to say hello to a friend next door by send him email ?
《计算机网络》中英文对照 Chapter 1 End system P28 端系统 Modem P29 调制解调器（俗称：猫） Base station P29 基站 Communication link P30 通信链路 Physical media P30 物理介质 Coaxial cable P30 同轴电缆 Fiber optics P30 光纤 Radio spectrum P30 射频频谱 Transmission rate P30 传输速率 Packets P30 （数据）包，或分组 Routers P30 路由器 Link-layer switches P30 链路层交换机 Path P30 路径 ISP (Internet Service Provider) P30 网络服务提供商 TCP (Transmission Control Protocol) P31 传输控制协议 IP ( Internet Protocol) P31 网际协议 Intranets P31 内网 API (Application Programming Interface) P32 应用程序编程接口Network edge P35 网络边缘 Access Networks P38 接入网 Ethernet P42 以太网 Network core P48 网络核心 Circuit Switching P50 电路转换 Packet Switching 分组交换 FDM (frequency-division multiplexing) P50 频分多路复用 TDM (time-division multiplexing) P50 时分多路复用 Statistical Multiplexing 统计复用 Store-and-forward 存储转发 Queuing delays P53 排队延迟 Transmission delay P60 传输延迟，或发送延迟 Propagation delay P60 传播延迟 Throughput P59 吞吐量 Internet backbone P57 骨干网 Delay P59 延迟，或时延 Loss P59 丢包 Packet-Switched Network P59 分组交换网络 Nodal processing delay P60 节点处理延迟 End-to-end delay P66 端到端延迟 Instantaneous throughput P68 瞬时吞吐量
①I am ______（自我介绍）. ②I am writing to see if it is possible for you to provide me with information regarding ______（要询问的内容）. ③First of all, what are ______（第一个问题）? ④Secondly, when will ______（第二个问题）? ⑤Thirdly, is ______（第三个问题）? ⑥I would also like to inquire ______（将最重要的问题单独成段）. ⑦Could you be so kind as to send me some relevant booklets on the above-mentioned aspects? ⑧Thank you for you kindness, and your prompt attention to this letter will be highly appreciated. Yours sincerely, Li Ming 祝贺信 Dear ______ , ①I have learned with delight that you ______（祝贺事由）. ②I would like to extend to you my utmost congratulations on ______. ③You must be ______. ④And I feel very happy for you. ⑤ ______（所取得的成绩）is quite exciting news! ⑥I know this is surely owing to ______（被祝贺人过去的努力）.⑦It is a reward you richly deserve for your ______（被祝贺人的优点）. ⑧Kindly let me know when you ______（咨询对方何时有空）.⑨I hope ______（表达自己的愿望）. ⑩My best wishes for your further success. Yours sincerely, Li Ming 推荐信 Dear ______ , ①It affords me much pleasure to recommend ______（要推荐的人）to you.②During his/her graduate years he/she was my ______ . ③As his/her ______ I found him/her ______（介绍与此人的关系）. ④His/Her performance in the school years was outstanding. ⑤First, he/she had been and showed great talents in ______ . ⑥In addition, he/she has a very pleasant personality. ⑦He has developed a strong sense of ______, and working with him is always. ⑧I can state that he/she has all the qualities of being ______.（介绍此人的能力） ⑨Therefore, I here recommend him/her to you with all my heart. ⑩Should you favor him/her with a position in your company/Should you accept him/her in your university？I am sure that his/her future conduct/academic work will prove worthy of your confidence. I look forward to hearing from you at the earliest possible moment. Yours sincerely, Li Ming
Are there more advantages than advantages to using mobile phones in class? Abstract: Key words: Date:November 7, 2016 Team name:EDS Name of editor/team leader:Edwiin Full name of team members:Shane, Denny, Edwiin Name of teacher:Bill Westwater Introduction: The cellphone has developed a long time and it is extremely popular with the people using mobile phone in class, especially when the smart phone come out in front of people.Most parent agree with students to take the phone to school. Cellphones are widely used by students whose can use the cellphone to take photos, serf the internet, connect with parents and friends. But the bad thing is that some students rely on smart phone and always focus on phone in the classes. And accordingto Tindell and Bohander (2012), 95% of students bring their phone to class every day,92% students use their phone to text message during class time, and 10% admit they have texted during an exam on at least one occasion.For example, Hurst (2004) hypothesizes that students used calculator functions to cheat on math test. This is high percentage in using mobile phones in classes, it means that cellphone have a great influence in the student’s study and their life. In the meantime, the problem which is that are there more disadvantage than advantage of using mobile phone in class? It is widelybelievedthat there is more advantage than disadvantage of using cellphone in class. However, a part of people thinks that there is more disadvantage than advantage to using mobile phone in class. It is heated debated in this discussion by people.This project will both explore the advantages and disadvantages of students to use mobile phone in class, and also will showhow the cellphone affect studying. Itwill alsoprovide the evidence and discuss the using cellphone advantage more than the disadvantage of using cell phone after getting the results. What is more,our group did a questionnaire about the people using cellphone in class in order to solved the problem. In this questionnaire it is clearly describedthe question like that what kind of things student do use the mobile phone in class. Finally, it would be point out that there is more advantage than disadvantage of using mobile phone in class. Methodology: This topic is connected to our normal life. So, making a questionnaire to interview others students which is the important efficiency way for us. Thisquestionnaire was made from last week andit concludes some information which is about are there more advantages than disadvantages to using mobile phones in class?Mobile phone use is widespread in University students and almost every student will take mobile
英语书信作文万能模板 第一：投诉信 示例一： Dear_______, [亲爱的___某某某：] I am . (自我介绍) I feel bad to trouble you but I am afraid that I have to make a complaint about_______. [我是__某某某，我感到很糟糕的麻烦你，但是我怕我不得不提出投诉关于__什么什么事件] The reason for my dissatisfaction is ______________(总体介绍). In the first place,_________________________(抱怨的第一个方面). In addition, ____________________________(抱怨的第二个方面). Under these circumstances, I find it ___(感觉) to ____________________________(抱怨的方面给你带来的后果). [我感到不满的原因是__。（总体介绍）首先，_____（抱怨第一个方面）。此外，_____（抱怨第二个方面）。在这种情况下，我发现它给我产生了____后果。] I appreciate it very much if you could_______________________(提出建议和请求), preferably __________(进一步的要求), and I would like to have this matter settled by ______(设定解决事情最后期限).Thank you for your consideration and I will be looking forward to your reply. [我非常感激如果你能____（提出建议和请求），最好是___（进一步的要求），以及我想要这件事在___时候解决。（最后期限）感谢你的关注，我期待你的回复。] Yours sincerely [你真诚的] Li Ming 示例二： Dear _____________ , ①I am _____________(写信人身份)。②I venture to write you a letter about_____________(抱怨内容)。 [我是___某某某。我冒昧的给你写封信关于___（抱怨内容）] ③The focus of the complaint is _____________(抱怨内容的核心)。④For one thing, _____________(抱怨内容的一个方面)。⑤For another, _____________(抱怨内容的另一方
玩手机高中英语作文 随着科技的发展，手机是我们随时不可离身的重要物品，但是它的危害又有谁真正的注意过? 下面是为大家精心整理的关于玩手机高中英语作文，希望能够帮助到你们。 玩手机 Nowadays, with the development of high technology, smart phone is very popular among the high school students. The smart phone once was thought to be forbidden using in the class, now has become very common tool for students. A lot of students keep their eyes on the phone all the time, even in the class, they still check on it. Teachers are upset about this situation, because they feel most students ignoring them when they are passing the knowledge. Some teacher think it is time to let the students hand in their smart phones in the class and after class, these communicational tool will be turned back. I don’t think it is a good idea. Even for the teachers, they count on their phones so much, let alone for the students. The teachers should improve their teaching method to catch the students’ interest.
?英语书信作文万能模板 ?第一：投诉信 示例一： Dear_______, [亲爱的___某某某：] I am . (自我介绍) I feel bad to trouble you but I am afraid that I have to make a complaint about_______. [我是__某某某，我感到很糟糕的麻烦你，但是我怕我不得不提出投诉关于__什么什么事件] The reason for my dissatisfaction is ______________(总体介绍). In the first place,_________________________(抱怨的第一个方面). In addition, ____________________________(抱怨的第二个方面). Under these circumstances, I find it ___(感觉) to ____________________________(抱怨的方面给你带来的后果). [我感到不满的原因是__。（总体介绍）首先，_____（抱怨第一个方面）。此外，_____（抱怨第二个方面）。在这种情况下，我发现它给我产生了____后果。] I appreciate it very much if you could_______________________(提出 建议和请求), preferably __________(进一步的要求), and I would like to have this matter settled by ______(设定解决事情最后期限).Thank you for your consideration and I will be looking forward to your reply. [我非常感激如果你能____（提出建议和请求），最好是___（进一步的要求），以及我想要这件事在___时候解决。（最后期限）感谢你的注重，我期待你的回复。]
Computer Network Test Paper 1.Who invented IP and some related Internet protocols? B a)Vinton Cerf and Bob Metcalfe b)Vinton Cerf and Robert Kahn c)Bob Metcalfe and Ivan Sutherland d)Bob Metcalfe and David Clark 2.In the OSI reference model, 3.The upper layers of the OSI model are, in correct order B a)Session, application, presentation b)Session, presentation, application c)Session, application, presentation, physical d)Application, presentation, session 4.The lower layers of the OSI model are, in correct order D a)physical, system, network, logical b)physical, logical, network, system c)physical, transport, network, data link d)physical, data link, network, transport 5.The Internet Protocol (IP) generally corresponds to which OSI layer? A a)Network (layer three) b)Transport (layer four) c)Data link (layer two) d)Session (layer five) 6.MTU stands for C a)Minimum Transfer Unit b)Minimum Transmission Unit c)Maximum Transmission Unit d)Maximum Transfer Unit 7.What layer of the OSI model is designed to perform error detection functions? B a)Physical b)Data link c)Network d)transport 8.Which of these network devices primarily functions at the OSI Network layer (layer 3)? C
一、英语书信的常见写作模板开头部分: How nice to hear from you again. Let me tell you something about the activity. I’m glad to have received your letter of Apr. 9th. I’m pleased to hear that you’re coming to China for a visit. I’m writing to thank you for your help during my stay in America. 结尾部分: With best wishes. I’m looking forward to your reply. I’d appreciate it if you could reply earlier.二、 三、二、口头通知常见写作模板呼语及开场白部分: Ladies and gentlemen, May I have your attention, please I have an announcement to make. 正文部分: All the teachers and students are required to attend it. Please take your notebooks and make notes. Please listen carefully and we’ll have a discussion in groups. Please come on time and don’t be late. 结束语部分: Please come and join in it. Everybody is welcome to attend it. I hope you’ll have a nice time here. That’s all. Thank you. 四、三、议论文模板 1.正反观点式议论文模板导入: 第1段:Recently we’ve had a discussion about whether we should... (导入话题) Our opinions are divided on this topic.(观点有分歧) 正文: 第2段:Most of the students are in favour of it.(正方观点) Here are the reasons. First... Second... Finally...(列出2~3个赞成的理由) 第3段:However, the others are strongly against it. (反方观点) Their reasons are as follows. In the first place... What’s more... In addition...(列出2~3个反对的理由) 结论: 第4段:Personally speaking, the advantages overweigh the disadvantages, for it will do us more harm than good, so I support it.(个人观点) オ 2.“A或者B”类议论文模板: 导入: 第1段: Some people hold the opinion that A is superior to B in many ways. Others, however, argue that B is much better. Personally, I would prefer A because I think A has more advantages. 五、正文: 第2段:There are many reasons why I prefer A. The main reason is that ... Another reason is that...(赞同A的原因) 第3段: Of course, B also has advantages to some extent... (列出1~2个B的优势) 结论: 第4段: But if all these factors are considered, A is much better than B. From what has been discussed above, we may finally draw the conclusion that ...(得出结论) 3. 六、 七、观点论述类议论文模板: 导入: 第1段:提出一种现象或某个决定作为议论的话题 As a student, I am strongly in favour of the decision. (亮明自己的观点是赞成还是反对) The reasons for this may be listed as follows. (过渡句，承上启下) 正文: 第2段:First of all... Secondly... Besides...(列出2~3个赞成或反对的理由) 结论: 第3段:In conclusion, I believe that... (照应第1段，构成"总-分-总"结构) 4."How to"类议论文模板: 导入: 第1段:提出一种现象或某种困难作为议论的话题正文: 第2段: Many ways can help to solve this serious problem, but the following may be most effective. First of all... Another way to solve the problem is ... Finally...(列出2~3个解决此类问题的办法) 结论: 第3段:These are not the best but the only two/ three measures we can take. But it should be noted that we should take action to...(强调解决此类问题的根本方法) 5.四、图表作文写作模板 The chart gives us an overall picture of the 图表主题. The first thing we notice is that 图表最大特点 . This means that as (进一步说明). We can see from the statistics given that 图表细节一 . After 动词-ing 细节一中的第
低头玩手机的危害高中英语作文 在任何时候，每一个人都会捧着手机，不顾家人与朋友，沉浸在自己的手机世界中。你知道低头玩手机有什么危害吗?要拒绝做“低头族”!下面是为你整理的低头玩手机的危害高中英语作文，希望你喜欢! 低头玩手机的危害高中英语作文篇1 With the advent of mobile phone and computer , the phenomenon that people always are phubbing are becoming more and more popular.So many students phubbed in the coach ,train or restaurant even walked on the road. As to this issue,different people has different ideas .Some take the view that it is no use connecting but may cause the big events .Such as the accident or fight.There is no doubt that phubbing is a false behavior .While others think the opposite,they agree that there is no way but have to do it .because the time is limited. As far as I am concerned ,every coin has two sides .while most people prefer it,the phubbing is a bad habit .As a matter of fact ,a few person mostly do a good deed.
. .word 资料. .. 第一章 计算机网络概述 第二章 数据和信号
第三章传输介质 第四章 . .word资料. ..
. .word 资料. .. ● What is Encoding? Why must encoding be used for data transmission? (1)【什么是编码？】Convert internal data of a sender into line signals suitable for transmission is called encoding . (2)【数据发送时为什么要编码？】 1) Electromagnetic signals in information process devices are not allowed transmitting directly over communication lines. 2) The signal type of a device differs from the signal type of a communication line. 3) The parameter requirements of device signals differs from the one of line signals. 4) Specific requirements in synchronization, efficiency , error control, etc.. ★ Because electromagnetic signals in information process devices are not allowed transmitting directly over communication lines, so encoding must be used for data transmission to converts internal data of a sender into line signals suitable for transmission. 2.3.4.机信号与线路类型不一样；机信号参数与线路传输的要求不一样；同步、效率、纠错等方面的特殊要求 ● Which two techniques are used when analog data transmitted by digital signals? Which of them is the most important? Why? 用数字信号传输模拟数据常用技术有哪两种？最常用的是？为什么？ (1) Pulse Code Modulation(PCM) and Delta Modulation(DM). (2) Pulse Code Modulation(PCM) is the most important. (3) The principal advantage of DM over PCM is the simplicity of its implementation. In general, PCM exhibits better SNR characteristics at the same data rate. ● What processes will be involved when analog data are digitized by PCM technique? 用PCM 技术将模拟数据数字化时，要经过哪些处理步骤？ Sampling (PAM)---->quantization---->binary encoding ---->digital to digital coding ● Q4-1 List three techniques of digital-to-digital conversion. ● Q4-4 Define baseline wandering and its effect on digital transmission. (1)In decoding a digital signal, the receiver calculates a running average of the received signal power. This average is called the baseline.(2)The incoming signal power is evaluated against this baseline to determine the value of the data element. (3)A long string of 0s or 1s can cause a drift in the baseline (baseline wandering) and make it difficult for the receiver to decode correctly. ● Q4-5 Define a DC component and its effect on digital transmission. (Define) When the voltage level in a digital signal is constant for a while, the specturm creates very low frequencies(results of Fourier analysis). These frequences around zero,called DC(derect-current) components , that present problems for a system that can not pass low frequencies or a system that uses electrical coupling. (Effect) DC component means 0/1 parity that can cause base-line wondering. 直流分量的影响不仅仅是基线偏移，还有更重要的原因。看看教材和课件，或看看原书作业答案。 ● Q4-9 Define scrambling and give its purpose. (Define) Scrambling is a way to avoid a long sequence of 0s in the original stream,Scrambling is a technique that does not increase the number of bits and does
注意：以推荐信（推荐和自荐大同小异），辞职信和道歉信为主，其他也要掌握 以防万一 做题之前先审题，分清楚信件类型，确定称呼，收件人，写之前列提纲，掌握文章行文结构，文章分三段，para.1, para.2, para.3 ;每段中包含的1）2）3）4）需要写在内，给出的句子可以根据自己的情况自由选择，组合成自己的模版，以防大家模版雷同。 大家整理出模版后一定要注意，模版只是套路，一切以试题指令为主，千万不要生搬硬套 一、建议信(关键词：make suggestions，suggest) Para.1:(第一段) 1) I am 自我介绍（看情况是否需要） 2）写作目的（二选一） 1：I am writing this letter toconvey / express my deepest / greatest concern about+出现问题的事项. 2：I am writing this letter for the purpose of conveying / expressing my deepest / greatestconcern about+出现问题的事项. Para.2:（第二段） 1)(指出问题的严重性） 1：It must be pointed out that the current situation is going from bad to worse. 2)（总述自己的观点：委婉指出不足）: 1: Though a multitude achievements have been made by 建议对方, still there are some areas to be improved. (总述自己的观点：应该采取措施）----------对应指出问题的严重性 2: Therefore，it is urgent / imperative for us to take even more drastic measures。 3) (分述建议一） 1:Firstly / First and foremost / ，... should / ...must /why not/...had better 建议 一。 4) (分述建议二） 1: Secondly / In addition / , ... should / ...must /why not/ had better 建议二 5) (分述建议三） 1: Finally，... should / ...must /why not/ had better 建议三。
优秀初二英语作文：手机的利与弊 以下是我们为大家整理的关于优秀初二英语作文：手机的利与弊的文章，希望大家能够喜欢！ \Cell phones have become increasingly popular in china these days. wherever you go you can see people using cell phones. many college students even high school students have cell phones. Cell phones have brought people a lot of benefits but the most important is that they are convenient. with cell phones in their hands they can keep in touch with anybody they want. if they want to get some information from the internet they can easily have their dream realized via cell phones too. furthermore if someone has a heart attack or a traffic accident a call to emergency hospital or to the police can quickly bring him the help he wants. " However cell phones can also bring people problems. the most serious is the electric wave radiation which is thought to be harmful to users brains. another problem is that when people are having a meeting or having a class or at a concert etc the ring of the cell phone may interrupt others. so i think people should use cellphones as little as possible and turn them off when they are attending important meetings or