下面是小编精心整理的专八答案(共含8篇），仅供参考，大家一起来看看吧。同时，但愿您也能像本文投稿人“喽喽”一样，积极向本站投稿分享好文章。
成功来自哪里?
Model Essay(范文)：
Nothing ventured. Nothing gained. If our greatexplorers and scientists did not live by this creed,where would we be? I think that we must all take risks in our lives, but these must becalculated risks. Like the great thinkers of our time, we must plan carefully, seize allopportunities, and reevaluate our plans.
There is no such thing as a chance occurrence. Columbus in his search for the Indies drewmaps, plotted his route carefully, and set out. Madam Curie worked diligently in her laboratoryrecording every aspect of her experiments. You need to have a careful plan so you canmeasure your success.
Even with a careful plan, changes occur. Columbus was looking for the Indies, but ended upin the Caribbean. Lewis and Clark were looking for a river passage west, but discovered muchmore. You have to be ready to take advantage of new things as they occur.
When things go against plan, you must be ready to change direction. Columbus didn't bringback spices from the East Indies, he brought back gold from the West Indies. It is important tosee the positive side of things. Make your mistakes work for you.
You will never succeed in life if you don't take chance. But before you start, you must plancarefully so you are ready to take advantage of every opportunity and turn mistakes to youradvantage.
永不放弃
Model Essay(范文)：
“If at first you don't succeed, try, try again.”These are wise words. One should never give up.There is always another opportunity, another goal, or another option.
Once I ran for president of my class. Unfortunately, I lost. I lost because I did not promotemyself enough. I looked at my mistakes and decided how to correct them. The following year, Iran for president again. This time I gave speeches, called voters on the phone, and banded outbrochures. This time I won. Never give up. There is always another opportunity.
Once I wanted to study medicine. Unfortunately, I didn't like science. I failed all my sciencecourses at school. Then I realized that what I liked about medicine was helping people. Ichanged my goal from healing people to helping people. Now, I'm studying psychology. Thereis always another goal.
Once I wanted to talk with my friend. Unfortunately, his computer was down and I couldn't e-mail him. His phone line was busy so I couldn't call him. Mail would take too long so I couldn'twrite him. Since I really wanted to talk with him. I got on the bus and went across town to visithim. There is always another option.
If you give up, you might as well die. My advice is to always look for another opportunity,another goal, or another option. There is always something else. Don't give up.
Part IV. Writing
Advantages and Disadvantages of Studying Abroad.
Directions: Write an essay of about words to state your view.
In the first part of your essay you should present the advantages of studying abroad. In the second part you should put forth the disadvantages of studying abroad. And in the last part you should clearly state your views about whether you prefer to study abroad or to study in your own country.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.
参考范文：
Some people believe that attending a college or university in a foreign country has many advantages. They think that attending a college or university abroad can help them learn more than they can from universities in their own country, especially when they go to a developed country where they can catch up with the pace of scientific and technical advance of the world from that country' s modern lab facilities. In addition, they can pick up the latest developments of the living language there more quickly, develop their ability of coping with the routine matters such as finding a part-time job, renting a house and helping with the house work, and learn many new things to widen their views and broaden their minds.
But some people don't agree to it. They think that attending a college or university in foreign country also has many disadvantages and the disadvantages outweigh the advantages. They hold that students studying in a foreign country will have more difficulties in both life and study. The most serious problem is the language barriers. They have to spend much time learning a foreign language and even if they have learned the language, they still can' t understand thoroughly what the foreigners and teachers say just because of the unfamiliar culture background and social cu
1. 听写
听写是对听力与速记技能的双重考核。这6周的时间，定型自己的答题风格是最重要的。即，四次听力的任务重心，单词简写的程度，还有2分钟复习时间的利用。这6周确保自己每天做1次完整的听写练习。从第一遍的听大意，到第二、三次的意群听写，再到第四次的校对需要在完全符合考试流程的状态下进行。就连最后的2分钟复查时间也要给自己。以上四次听力任务重心的科学性是由实践得到的。轻易不要打破。但适度的变通、个性化还是可以接受的。例如第一次听，也可以在草稿上写写关键词，提醒自己文章的整体架构，但注意一旦一句没听懂，不要纠结，给自己机会在第二第三次中揣摩。
常见问题：
(1)英音、美音
很多考生平时训练的听力材料都是美音，导致自己对于英音有很强烈的不适应感。专八的听写或听力，英音或美音的可能性都为50%。所以，考生平时练习的时候要有意识培养自己对这两种语音的适应度。选择的音频，也要两种语音兼顾。
(2)全文没有标点符号
材料的标点需要考生自己根据意群去划分。考生一方面可以利用录音第二遍、第三遍的断句来判断，另一方面还要强化自己的英文标点意识。不要中、英标点混用。
(3)最后复查2分钟没有充分利用
部分同学会急于用这2分钟浏览听力考题，导致听写部分出现一些“小儿科”错误。单词的单复数、过去时态、has/is 的错用、主谓一致等都是在这2分钟内可以检查并更正的。另外一个要注意的就是，根据得分、扣分的规则，如果有一句话基本没听清楚，那放弃这句话去检查其它句子才是明智之举。听写是专四的第一题，它的成败在很大程度上决定了考生的心情。在这六周时间里，每个早晨从听写开始，培养自己的答题风格。
2. 听力
听力复习分为两部分：一部分是日常生活话题的对话或是陈述;另一部分是VOA和BBC的新闻听力。考生们在前4周可以专门进行日常生活话题的听力训练，每天保持40分钟左右的听力，复述出材料的中心含义，并与原文进行对比。这项训练主要是培养考生们对于关键句型的敏感度以及抓重点的能力，这种能力对于各种形式的听力理解都是有帮助的。后2周专门针对VOA或BBC的新闻听力，熟悉英语新闻的结构，以及用词特点。同样也可以采用复述大意或辅助真题练习的方式敦促练习。
常见问题：
预读真题
如果是以真题作为训练材料，那就一定要模拟真实的考试步骤。预读真题并明确各选项的区别对于抓重点听力特别有效。强烈建议大家一定要在平时的练习中养成这样的习惯。但注意平时的训练中也不能给自己无止境的时间来预读题干。而应该控制在5秒左右。
法语专八的题型大家应该已经有所了解，包括听写填空(10分)，听力理解(10分)，词汇语法(同义替换10分+完形填空10分)，法译汉(10+2.5分)，汉译法(10+2.5分)，阅读理解(20分)，写作(15分)，一共七个大题。其中听写填空、听力理解、阅读理解、写作这四个大题的备考是要贯穿整个复习过程始终的，其实它们也是最容易在短时间内大幅提高得分率的题型。而词汇语法、法译汉以及汉译法这三种题型，相对而言更依靠长时间的积累，短期复习的帮助不一定会很明显。
基于对考试题型的认识，同学们应该在四周备考期中每天坚持做三件事情：听、读、写。
首先是听，如果你还没有听过历届专八真题，那么花三天左右的时间先从真题开始；接下来的二十多天时间，听法语广播，首推RFI的franais facile，资源在沪江法语频道都有，并附有法语原文，大家一定不要投机取巧，对着原文听广播，应该先听几遍广播，大致弄懂意思了再参考原文，看有哪些重点遗漏；此外，沪江听写酷中的听力填空题建议多做。对于已经听完专八真题的同学，就可以省去第一步骤了。
关于读，主要目的是培养阅读感觉和快速理解的能力。训练过程仍然是从真题开始，不一定要落实到题目，但每读一篇文章，要在尽量短的时间里把握大意（争取控制在5分钟以内），这一阅读阶段持续三天左右；接下来的时间读外报，推荐法国晚报，可以找到很多篇幅和词汇难度与专八相当的文章，注意一些专业性太强、有明显政治倾向和篇幅太长的文章应果断舍弃。特别要强调，阅读最忌讳纠结生词，生词是难免的，但它们往往并不会影响对文章整体的理解。阅读过程中关注常用词汇和表达方式。
最后是写，不用多讲，四周里至少每两天一篇作文，写作自然会越来越顺手的。写作主题最好是谈论对某些观点或社会现象的看法，不用很深，但需要有些思考，不要总停留在讲述自己生活这类的话题。作文中避免用生僻词、疑难句，表达清楚是关键，学会用连词（d’abord，puis，finalement，ainsi…）让文章有层次、有逻辑，适当出现几个从句可以为你加分，但千万不要几个从句套一起。一些在阅读外报时学到的表达应该用到自己的文章中。
除了听、读、写三项每天必须完成的任务，建议同学们前两周系统复习本科阶段所有语法，抓主要用法和易错用法，不具普遍性、不常用、太细小的语法点无需关注，复习期间配合少量针对性巩固练习。后两周以做题为主，主要是词汇方面的综合题，尤其要留意题目中短语、代动词的固定用法，最好做题的时候可以背下来，普通的单词只需留有印象即可，排除冷门偏门。另外同时开始进行汉译法练习，通过前两周的阅读和写作，大家积累了一些表达，所以从第三周开始练习汉译法是比较合适的，按专八的规格找一些中文句子练习翻译，原则是准确、清楚，不要受中文句式限制，只要表达出同样的意思就行了，遇到不会的词要尝试换一种差不多的说法，不要一词不会就整句不会了。
最后，无论如何要在考前留出三天左右时间，完整重做专八真题，必须严格按考试流程进行。
关于法译汉，这四周里没有安排专门练习，其实阅读方面的练习对法译汉是有很大帮助的，建议大家在阅读外报的时候，可选取其中一段进行口头法译汉。法译汉应先全文浏览，再逐句翻译，若想拿到满意的分数，首先表意要准确、完整，避免法语式中文，不建议大家在文笔上花很多心思或完全采用意译的手段，对于考试而言，直译还是更能讨巧。
温馨提示，翻译和写作中要避免时态或性数配合这类的低级错误。另外，关注国内外时事已经是老生常谈了。八级题量较大，答案往往不是一目了然，所以同学们备考阶段就要有时间意识，考试时要合理安排，字迹清楚。
一.听力听写题部分：
听力是中国学生永远的痛处。在没有法语语言环境的情况下，在大学学习了四年的`学生，听力还是有一定的局限性的。在四周内提高听力水平，可能吗？当然！这就要提到我们前面要确定的：要做到废寝忘食地学习。由于听力的提高需要一个延续的长期的过程，所以想在短期内提高，就只有加强听力的训练强度：只要有时间，就听法语听力。时间都是挤出来的，不挤的话永远都没有可以进一步提高的空间。
计划：首先，在这四周内，每天固定练习2次法语听力，每次一小时。可以做听写，也可以听法语句子，课文等等。
这是基本的训练，能保证听力的基本得分。然而如何做到更好呢？一定要培养法语的语感。因为大部分学生都生活在汉语的语言环境中。然而在这四周的备考时间内，你要努力扭转这种局面，让自己生活在法语的环境中。怎样做到呢？小编建议的是，每天吃三餐的时候，可以边听法语边吃。不需要你真的去逐字逐句听懂，而是让你的大脑熟悉法语这种语言，培养自己的语感。什么？你说吃饭要专心不然消化不良？要什么消化啊！要过专八！只有四周而已，坚持一下吧！
另外一个容易被忽视的可以提高听力的时间是：睡觉前。其实睡觉前躺在床上听听力是一种一举两得的学习方法。相信大多数学外语的同学都有这种感受：听外语可以助眠。法语也是如此。睡觉前躺在床上听会儿听力，更容易入眠，同时也可以锻炼听力。睡觉前的听力时间长短不重要，哪怕是5分钟，也是你能在听力上多得5分的原因。
二.词汇语法题部分：
这个比较考验基本语法。万变不离其宗，翻开自己上课时的笔记本吧，认真温习这4年来学过的语法，最好是边看边读，记忆的效果会更好。若觉得四周时间紧，就先着重看大二的。要知道，对法语学生来说 ，大学四年最重要的一年，就是大二。大二比较集中的讲了法语的各种时态和语法，当然这并不代表其他3年都是白上的，大一的语音，大三和大四的语法以及阅读都是非常非常重要的，缺一不可。都需要在专八考试前温习一遍。
计划：四周内，每天用两个小时学习法语语法词汇，是比较合适的时间安排。
还想提的一点是，在考试的时候，如果觉得词汇语法题有拿不准的，千万不要纠结太久。分值不大，没必要耗费太多的时间。因为后面有翻译题的部分，这里比较容易得分。所以要学会取舍。
三.中法互译题部分：
这里往往比较容易得分。每句的难度都不一样，先从看一眼就会做的句子下手。看到题目的时候，如果觉得有一处不会翻译，先别急，静下心来想一想其他的可以变通的办法，用另一个相同含义的词组或者词汇来代替，同样可以翻译出原句的意思来。
中法互译应该怎样练习呢？可以多找点法语原文来看看，加强对法语行文的掌握和理解。这同样可以提高后面的阅读理解部分的能力。
计划：四周内，每天用1个小时来练习这一部分。
四.文章阅读题部分：
阅读文章要有技巧，要做到“一目十行”但是又要抓住重点。这就需要平时对法语文章的积累。
计划：四周内，每日花2小时，阅读法语文章，报纸，名著，期刊杂志等等都可以。
五.写作部分：
写作方面，真题是一定要看的。看看往年的写作题目，着重看给出的写作范文。只要多看几篇范文，才知道哪种类型的文章是容易得高分的，自己写的时候在脑中才会有一个标杆。
计划：四周内，每日写一篇法语作文。
例文一：
Do It, but with Love and Sincerity
The year witness target=_blank class=infotextkey>witnessed the birth and boom of an activity online and offline both at home and abroad: the ice bucket challenge. Originally designed to attract public attention to the disease amyotrophic lateral sclerosis (ALS), the practice has aroused a heated debate during its development. There exist opposing views on this matter. Proponents, represented by the ALS Association, claim that it is beneficial and praiseworthy, for it substantially increased donations for sufferers of the disease. Opponents, however, argue that it wastes water, does harm to one’s body and risks becoming a form of entertainment or commercial advertisement.
Personally, I deem that both sides have an element of truth in their arguments and the issue should not be addressed in a simple and crude way.
On the one hand, no one can deny the fact that the practice has benefited patients of ALS. Many people have not only donated money but also begun to learn about the disease and pay more attention to it.
On the other hand, however, the activity does seem to have deviated from its original purpose. As we have heeded, quite a number of the attendants got involved to attract eyeballs to themselves, rather than the disease. Most remain ignorant about the disease though bombarded by pictures of celebrities soaked in iced water that went viral online.
In the final analysis, I should say that the activity is a two-edged sword. But we should not give up eating for fear of being choked. The best policy, as I see it, is to take measures to avoid the harm done by it. For instance, a campaign should be launched at the same time to provide people with more knowledge about the disease, and encourage them to help those in need with love and integrity. Besides, the activity can well take a different form in drought-stricken regions.
例文二:
Problems Created by the opulatton Explosion
This sudden increase in the population of the developing countries has come at a difficult time. Even if their population had not grown so fast they would have been facing a desperate struggle to bring the standard of living of their people up to the point at which there was enough food, housing, education, medical care and employment for everyone to have a reasonable life.The poor countries are having to run faster and faster in their economic activity in order to stay in the same place, and the gap in wealth between rich and poor countries grows wider every year.
The most pressing problem created by the rapid increase in population is a shortage of food. More mouths have to be fed every year and yet a high proportion of the existing population are not getting enough of the right kind of food. Over the past two years the total amount of food has decreased, and of course the total amount of food per person has decreased even more sharply.
More and more of the babies born in developing countries have been surviving infancy, and now nearly half the people living in those countries are under the age of 15. The adults have to work harder than ever to provide for the needs of the children,who cannot contribute to the economy until they are older. There is a shortage of schools and teachers, and there are not enough hospitals, doctors and nurses. Farming land is becoming scarce,so country people are moving to the towns and cities in the hope of finding a better standard of living. But the cities have not been able to provide housing, and the newcomers live in crowded slums.Finally, there are too few jobs, and unemployment leads to further poverty.
例文三：
In a frantic society where efficiency is put great emphasis on, maybe it is high time we should take a breath and think about the bad consequences brought about by the head-spinning life. In the following excerpts, the author presents his opinion on the slow lifestyle versus the fast one. Read the excerpts carefully and write your response in about 300 words, in which you should:1.summarize briefly the author’s opinion;2. give your comment. Marks will be awarded for content relevance, content sufficiency, organization and language quality. Failure to follow the above instructions may result in a loss of marks.
Fast-free Living What Americans would do if they were serious about stopping to smell the flowers? Is the American lifestyle slowing down, in a response to national trauma and the onset of war? Judging from commentaries by cultural analysts and newspaper columnists, the answer is yes.
A Boston Globe editorial looked back on a hard year: “But it brought growth, too, and a deeper understanding of just how fragile life is, and how what we often take for granted―the kiss goodbye in the morning, the chat with a friend, the Saturday soccer game―is what matters most.” An observation from The Washington Post: “People seem to walk more slowly. They are off their brisk, self-important stride... Motorists are driving better. They lay off their horns. They don’t jump lights.” From The Dallas Morning News: “Americans are experiencing a sort of ‘cocooning of the heart’, cultural experts say. They’re using this time to reconnect with their families and friends.”
If Americans really were beginning to slow down, the contemporary simplicity movement would not be adding another meeting or two a month to our schedules. The antidote to a frenetic work life wouldn’t be something called “power leisure”.
The celebration of the new slowness may not reflect reality, but it surely does reflect some degree of yearning. Yet there may be a few bold steps we should take to get us on the path to fast-free living.
Backpacks. The task of slowing the country down must begin with efforts aimed at prevention. It should begin early, as an inspection of any schoolchild’s backpack will reveal. These encumbrances typically have a capacity of one and a half cubic feet and hold loads of forty pounds. The contents, unpacked and spread out like a GI’s battle kit, represent hyper-achievement in microcosm. A simple yet revolutionary reform would be to decree that the capacity of school backpacks be reduced by two thirds.
Drive-thru windows. The whole point of these amenities is speed, and without intervention drive-thru service will only get faster. According to The Futurist, McDonald’s will soon introduce e-mail billing at some of its drive-thru facilities in southern California. Other chains are experimenting with an E-Z Pass system, similar to the one used for bridge and highway tolls; a transponder in the car would permit purchases to be deducted automatically from prepaid accounts.
Electric light. Another issue related to biorhythms is the seemingly inexorable drift toward a 24/7 economy. The rule of thumb is that if anything can be done twenty-four hours a day, it will be; daycare centers and dentists’ offices are now open at midnight. Almost by definition, the maintenance of basic diurnal rhythms is essential to a humane way of life. Political arithmetic may forever doom a significant rise in the gasoline tax, but what about levying a ten-cent-a-watt tax on light bulbs? One happy consequence might be a shift back to daytime baseball.
Computer keyboards. Yes, computers have made many aspects of modern life more tolerable, enabling stupendous feats of calculation, storage, and management. But they are also an attractive nuisance, putting unimaginable amounts of sheer capability―to buy, to pry, to surf, to meddle―into the hands of people unaccustomed to its wise use. One way would be to decide that every computer must have two separate keyboards―one with all the vowels and the other with the consonants.
The measures outlined above would be a start. Should more impetus be needed, we could ban cup holders from cars, demand that breaking news be delivered only by mail, and add a ball and a strike to the standard at-bat. If Americans intend to take slowness seriously, they need to start picking up the pace.
Write your response on ANSWER SHEET FOUR.
科技对学生学习的帮助
Model Essay(范文)：
Technology has greatly improved the way we getinformation. Students can now get more information,get it more quickly, and get it more conveniently.
The Internet and the World Wide Web has opened every major library and database tostudents around the world. Information comes not only in print form, but also in multimedia.You can get audio and video data. You can get information about event in the past as well asevents that unfold as you watch your computer monitor.
Information comes at the speed of the Internet, which is to say in nanoseconds. You cantype in a few key words in your search engine, and the engine will search the entire www to findinformation on your topic. You don't have to spend hours pouring over card catalogs in thelibrary and looking at the shelves. This research is done for you instantly on the Web.
It is certainly more convenient to sit at home and do research on your computer. Yourcomputer is open 24 hours a day, unlike a library or office, which has limited hours and limitedresources. You can do research in your pajamas while you eat breakfast. What could be moreconvenient?
Technology, especially the Internet, has certainly changed the quantity and quality of theinformation we get. The speed and convenience of a computer helps students learn more,more quickly.
求职
As is vividlydepicted by the drawing above, the job-hunting girl refuses a service post without any hesitation, complaining that she will never take a job of serving others. At the same time she is wondering why finding a promising job is so difficult in modern society.
This phenomenon can easily be found anywhere in our daily life, especially on campus. On the one hand, many job-seekers are reluctant to take jobs that they consider to be humble and trivial, because they have great ambitions and they only want to ride on the peak of success. On the other hand, wanting to gain more but pay less, both the jobless and graduating students aspire to seek a job that is well-paid, relaxed and comfortable. We should not look down upon service industry, the third industry, because it does provide us with many employment opportunities and positions.
Therefore, it is high time that we took effective measures to improve the current situation. For one thing, an education campaign should be launched to popularize the idea that “the longest journey starts with a single step” and to cultivate a down-to-earth attitude toward life. For another, the tendency of being lazy must be eradicated from the mind of the young. Only in this way can people realize their value of life better and can unemployment rate be reduced and thus can social harmony be achieved.
专八阅读理解练习及答案
NCB in Interpol
The organization known to the world as Interpol has sometimesbeen described as an outfit of chisel-jawed gimlet-eyed crimefighters who put their lives in jeopardy every working hour. Lessflatteringly, Interpol has also been described as a huge filingcabinet, stuffed with clerks choking on their own statistics.
As with most generalities, there is some truth in both statements. There are, certainly, some grimbattlers of crime to be found working with Interpol. There are, just as surely, those drones shufflingmountains of paper whose cheeks are sallow from indoor life. Consider the charisma of the namealone: INTERPOL, the international police force. Continents leaped in a single bound, oceanscrossed in the space of a breath, villains watched by eyes that never sleep. Surprisingly, a lot of ithappens almost that way.
Four groups coordinate and direct the activities of Interpol. One of them is the National CentralBureaus, or NCBs, bodies designated by the member nations to serve as their link with Interpol.These are the front-line troops, the action people. IN the United States, the Treasury Departmentis the National Central Bureau. In the United Kingdom, it is Scotland Yard; the Questura in Italy andthe Melbourne City Police in Australia. Because police organization varies from country, the NCBswere established to act as the one special group to handle Interpol chores and unsure maximumcooperation between nations. Each NCB is usually an official government body with police powers ifa country has only one central police authority, that body becomes the National Centre Bureau. Ofcourse, any service appointed as an NCB is bound to its nation’s law and authority and retains itsnational title.
Each NCB is connected by radio to the regional station for its geographic zone. The regionalstations are connected to the Central Station in France. The radio network is versatile. Networkstations can monitor the Central station or any regional station. Because of this messages can bebroadcast to more than one station at a time. A coding system determines the urgency of eachmessage so that those with high priority can be given precedence. Besides, other communicationtools, such as radio-teleprinters and phototelegraphy equipment. Permit rapid transfers offingerprints and photographs. Sometimes ever more advanced technology is employed. When thepolice all over the world were looking for a Canadian named George Leray, they turned to the EarlyBird Satellite. Leray had led his gang on a daring holdup of a Montreal bank and gotten away with$4 million. Scotland Yard broadcast Leray’s photo to the world by satellite. An American who sawthe picture in Florida recognized Leray as a man who was living on a yacht in Fort Lauderdaleunder an assumed name. The police were alerted and arrested Leray.
1. What is the best title for this passage?
[A] The Function of the Interpol. [B] The Quality of the Interpol.
[C] The Organization of the Interpol. [D] The Rapid Development of the Interpol.
2. The organization of this passage is
[A] general to specific. [B] cause and effect.
[C] comparison and contrast. [D] development.
3. The sentence “stuffed with clerks choking on their own statistics” in the first paragraph is closestin meaning to
[A] a lot of employees busying in their work.
[B] many office workers busying with various documents.
[C] crowded with office workers busying with their own collected data.
[D] workers busying in their own information.
4. Which is the easiest tool to communicate?
[A] Satellite. [B] Radio.
[C] Teleprinter. [D] Phototelegraphy.
答案详解：
1. C. 国际刑警组织。上面文章大意已经说明介绍国际刑警组织，其职能性质只是附带涉及。所以
A. B. 不对。 D. 迅速发展，文章没有涉及。
2. A. 文章是一般到具体的组织结构。
B. 因果 和 C. 对比。 不对。 D. 展开，任何文章都得展开。
3. C. stuff=crowd 办公室挤满了工作人员，忙于分析处理收集来的信息和数据。见难句译注1参考译文。
A. 有许多雇员忙于工作； B. 许多办公室人员忙于各种文件； D. 忙于自己信息的工人。 这三项都没有。
4. B. 无线电通讯。纵然第四段内提及种种手段：卫星，无线电，打印机，传真电报。但无线电通讯仍是他们运用的`最方便和最得力的工具，因为他们的无线电网络灵活多用，网络站能监控中央和各地区站点，而且一次能把信息传至好几台。至于卫星，电报，传真电报只是在特殊情况下运行，如快速传送照片，指纹等。所以A. 卫星， C. 无线电打印机， D. 传真电报，不对。
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