homework_4_参考答案
Exercise 2
Question 4. File Compression
In this section, you will use a compression algorithm to compress a message. Then you will use a compression application to determine the properties of compression.
a.How does dictionary-based compression work?
How does dictionary-based compression work? As knows, all text files all make up of many words, and
there must be repetition among these words, while these words occupy many bytes. So, we can make something what looks like dictionary; put this “dictionary” in the head of the file, which compressed from
the source file. In this dictionary, we use one emblem to replace those words, which appear continually in
the file. By this way, we can get one new file which occupies fewer bytes than the old one, at the same time,
the content of the file would not be destroyed. When we need use this file to get the source one, we could
seek the dictionary, and get the source file. So, it was the ancestor of the lossless compression.
Use dictionary-based compression to compress the message below:
sea shells, sea horses, and seals are in the sea.
For example: “#” expresses “sea”, so the message can be expressed by this new message: # shells, # horses, and #ls are in the #.
b. How many bytes does the message above contain (each character is 1 byte including spaces)?The message above contains 49 bytes
c. Create a compression dictionary and calculate its size in bytes.Dictionary: #sea, 4 bytes.
d. What is the compressed message?The compressed message is “# shells, # horses, and #ls are in the #.”
e. How many bytes did the entire compression use?The entire compression use 45 bytes.
f. Is dictionary-based compression a lossy compression? Explain.No, dictionary-based compression is not a lossy compression. Because by this compression, during we compress the source massage, we use the single emblem to replace the repetition, while we resume or uncompress the message, we should replace the emblem with the repetition, so it won’t destroy the file.
Copy and paste the entire content of this exercise into Notepad and save it as compress0.txt
Compress this file using WinZip or any compression application and name it compress1.zip. If you do not have WinZip application installed on your
computer, refer to Appendix B. Downloading WinZip Appendix for directions to download the application.
g. What is the size of the file before and after compression? What is the compression ratio of compress1.zip to the original file?The size of the file before is 8K, and it is 4K after compression. The compression ratio is 2:1
Compress compress1.zip and name it compress2.zip.
h. What is the compression ratio of compress2.zip to compress1.zip? Explain what is happening. (Hint: think of information that needs to be stored for a compression.) The compression ratio is
3.04:3.11. Because compress1.zip has be compressed, there is no space to be recompressed, on the other, the new compress file-compress2.zip contains more massage used to compress, such as dictionary, so the ratio of them become bigger, it is unnecessary to compress the file be compressed, especially the text file.
i. Is this a lossy or lossless compression? What do you think would happen if you kept on compressing the file successively?This is a lossless compression. Is I kept on compressing the file, the compression ratio should become bigger and bigger, the new compression file should occupy more space.
j. Is lossy compression appropriate for compressing images? Is it appropriate for hard disk backups? Provide explanations for both parts. Lossy compression is appropriate for compressing images, because in the images, there are some details should not to be adverted, on the other hand, naked eye can’t distinguish many details, such as boundary, the color with high resolution ratio. But it isn’t appropriate for hard disk backups, because the files in the hard disk , must to be uncompressed if necessary, with none changes and destroyed. This kinks of file must be compress by lossless compression.
Unit 1 and Unit 2 Review Materials
https://www.360docs.net/doc/b68629783.html,pression
a.What is compression?
Compression is the process of reducing file sizes by removing redundant data
expressions and replacing them with smaller ones.
b.Describe a benefit of compression.
Compression reduces file sizes, which makes it easier to transmit data over a network, as
an example
c.Describe dictionary-based compression.
Dictionary-based compression replaces sequences of characters that appear
frequently with a single codeword, or symbol. The mapping betw een the codeword
and the original sequence of characters is stored in a dictionary.
d.Describe run-length encoding.
Run-length encoding(运行长度编码) is a compression style used with graphics files.
Patterns of pixels are replaced by information that describes the pattern. For instance,
instead of 100 consecutive bytes of data, representing 100 white pixels, run-length
encoding replaces this data with two bytes: the first represents the number of pixels,
the second the color.
e.Describe a benefit of lossy compression.
The benefit of lossy compression is that data that is undiscernible to the human eye or
ear is removed, which decreases the file size without removing data that is important.
https://www.360docs.net/doc/b68629783.html, a file type that incorporates lossy compression
JPG, MP3, as examples.
7.Images
a.How are bitmapped images rendered?
Bitmapped images are rendered by interpreting the value for each given pixel. The
size of a bitmapped image is fixed and when rendered each pixel is mapped out to
have a given value.
b.How are vectored images rendered?
V ector images use mathematical calculations to compute the image. In other words,
the image creates geometric shapes that are computed and drawn as the image is
rendered.
c.Which image type tends to be more photo-like in quality,
bitmapped or vectored?
Bitmapped.
d.Which image type maintains a high image quality, regardless of
how it is resized?
V ector.
e.List three image editors.
Adobe Photoshop, Microsoft Image Composer, Adobe Illustrator
9. Magnetic Media
a.List two advantages of magnetic media over optical media. As an example, magnetic media is less expensive.
As an example, faster for writing data.
As an example, magnetic media provides higher capacities.
b.Fill in the following chart matching the type of media with its
storage capacity. The types of media to choose from are Jaz disk,
Zip disk, hard disk drive, high-density floppy disk, and double
density floppy disk.
c.Consider that magnetic media is read by an electromagnet. How
does the read/write head discern and transfer data from the
magnetic media to the system?
The read-write head uses a weak electro-magnetic force to read data, and a stronger
electro-magnetic force to change the orientation of the magnetic particle, assigning
orientations that correspond to 1's and 0's. The particles polar alignment determines
the data that a given bit holds.
10.Moore's Law
a.Define Moore's Law.
The number of transistors on a microchip will double every 18 months, until physical
limitations are reached
b.List two extrapolations of Moore's Law that are discussed in the
course materials.
RAM storage capacity doubles every 18 months.
Processor speeds double every 18 months.
c.How can Moore's Law and the extrapolations from Moore's Law
assist a consumer in purchasing a computer?
Moore's Law and its extrapolations offer the consumer the ability to plan for future
upgrades and determine the lifespan of a given system, allowing the consumer to
determine the best way to maximize their purchase with respect to the computer's
power and lifespan.
d.Define Parkinson's Law of Data.
Data expands to fill the space available.
https://www.360docs.net/doc/b68629783.html,ing Parkinson's Law, what projection can be made regarding
memory and hard disk usage?
According to Parkinson's Law of Data, the space in memory will be used if it is
available. In other words, as industry develops media with greater storage capacities,
d ata and softwar
e will increase in size to fill them. (We will never have “too much”
memory or disk storage.)
f.How can Parkinson's Law assist a consumer in purchasing software
or components for a computer?
Parkinson's Law of Data can help a consumer purchases a computer system, knowing
that storage capacities are always increasing, and the data to fill it will increase
proportionally. The consumer can estimate how much storage space is necessary now
and in the future.
11. Optical Media
a.List two advantages of optical media over magnetic media.
Optical is more resistant to environmental effects, as an example.
Optical is has a longer lifespan (less chance of decay), as an example.
b.Fill in the following chart. The types of media to choose from
are CD-R, CD-RW, CD-ROM, and DVD-ROM.
c.Consider that optical media is read by a laser. How does the laser
discern and transfer data from the optical media to the system?
The laser deciphers light and dark spots to create a stream of digital information. The
light is reflected by the media and a light sensor reads the reflected light.
d.Consider that a DVD and a CD are the same siz
e. List two reasons
a DVD holds more information than a CD.
The color of laser used by the DVD is narrower, allowing the tracks to be closer together. DVDs are layered allowing more data to be record on the same area at different depths.
大学英语综合教程1课后习题答案
Unit 1 Part Ⅱ Reading Task Vocabulary Ⅰ1. 1)respectable 2)agony 3)put down 4)sequence 5)hold back 6)distribute 7)off and on 8)vivid 9)associate 10)finally 11)turn in 12)tackle 2. 1)has been assigned to the newspaper’s Paris office. 2)was so extraordinary that I didn’t know whether to believe him or not. 3)a clear image of how she would look in twenty years’time. 4)gave the command the soldiers opened fire. 5)buying bikes we’ll keep turning them out. 3. 1)reputation; rigid; to inspire 2)and tedious; What’s more; out of date ideas 3)compose; career; avoid showing; hardly hold back Ⅱviolating Ⅲ;in upon Comprehensive Exercises ⅠCloze back; tedious; scanned; recall; vivid; off and on; turn out/in; career ; surprise; pulled; blowing; dressed; scene; extraordinary; image; turn; excitement ⅡTranslation As it was a formal dinner party, I wore formal dress, as Mother told me to. 2)His girlfriend advised him to get out of /get rid of his bad habits of smoking before it took hold. 3)Anticipating that the demand for electricity will be high during the next few months, they have decided to increase its production. 4)It is said that Bill has been fired for continually violating the company’s safety rules. /Bill is said to have been fired for continually violating the company’s safety rules. 5)It is reported that the government has taken proper measures to avoid the possibility of a severe water shortage. /The local government is reported to have taken proper measures to avoid the possibility of a severe water shortage. 2.Susan lost her legs because of/in a car accident. For a time, she didn’t know how to face up to the fact she would never (be able to) walk again. One day, while scanning (through) some magazines, a true story caught her eye/she was attracted by a true story. It gave a vivid description of how a disabled girl became a writer. Greatly inspired, Susan began to feel that she, too, would finally be able to lead a useful life. Unit 2 Part ⅡReading Task Vocabulary Ⅰ1. 1)absolutely 2)available 3)every now and then 4)are urging/urged 5)destination 6)mostly 7)hangs out 8)right away 9)reunion 10)or something 11)estimate 12)going ahead 2. 1)in the examination was still on his mind. 2)was completely choked up by the sight of his team losing in the final minutes of the game. 3)was so lost in study that she forgot to have dinner. 4)has come up and I am afraid I won’t be able to accomplish the project on time. 5)of equipping the new hospital was estimated at﹩2 million. 3. 1)were postponed; the awful; is estimated 2)reference; not available; am kind of 3)not much of a teacher; skips; go ahead Ⅱ;on Ⅲor less of/sort of 4. kind of/sort of 5. more or less 6. or something Comprehensive Exercises ⅠCloze up; awful; practically; neighborhood; correspondence; available; destination; reunion; Mostly; postponing; absolutely ; savings; embarrassment; phone; interrupted; touch; envelope; signed; message; needed ⅡHalf an hour had gone by, but the last bus hadn’t come yet. We had to walk home. 2)Mary looks as if she is very worried about the Chinese exam because she hasn’t learned the texts by
泛读教程第一册 Unit 4 Food
Unit 4 Food(饮食)--- A Food Tour of the United States Task 1: Discussion 1.Do you know some information about regional feature of Chinese food and some specialties in each region? 2.Do you know what the features of American food are? Do you know how many distinct regions are there in U.S? What are they? (the Northeast; the South; the Mountain States; the Southwest states; and ?) 3.* Why American food is regional in character? (The U.S has a large area. Each place has their unique geographical and climatic condition, so it produces unique food materials, such as the Northeast which borders sea, river and lake is rich in seafood and the Mountain states produce wild games. The similar rule can also be applied in self-cultivation, running a company and governing a country: to find out our own unique talent, our strength; the more loca/nationall, the more international.) Reading- skill questions about the text: 1.What’s text-type? (narration, description, exposition, or argumentation) 2.What’s th e topic and main idea of the text? (Reading skill: distinguish /obtain main idea and discourse topic quickly and efficiently) Topic: food Main idea: American cooking is regional in character./ one feature of American cooking is variety. 3.Which is the topic sentence in Para.1, sentence 1 or sentence 2? Why? 4.Para2.: guess the meaning of the unfamiliar word “ hearty” in “Mixed in an iron pot and …….” (hearty: [attrib]large; eg. eat a hearty breakfast 丰盛的；have a hearty appetite 胃口很好) Task 2 1.Analyzing different types of reading comprehension questions: Q1: testing skimming skills--- to obtain main idea quickly and efficiently Reading strategy/solution: 文体判断为说明文，顾第一段为重要 Q2-8: testing scanning skills--- to find some key words or phrases; figures, percentages quickly Homework: discussion Why do many people want to go into business for themselves rather than work for an already existing organization? What’s the attraction? To be a manager or leader of a company, what are some of the qualities do you think he or she should have? Reading skill testing: 1．He put his milk in a pouch made from a sheep stomach and set off across the desert. What is the meaning of the word “Pouch”? (C) A. milk B. desert C. a container D. a stomach 2．The movement of his camel, the desert heat, and the chemicals in the pouch made the milk separate into curd and whey. The thick part, or curd , was the first cheese. What is the meaning of the word “curd”? A. the camel B. the thick part of the milk C. desert heat D. milk
新世纪大学英语综合教程1课后答案(全)
2. (1) obtain (2) confident (3) communicate (4) advantage (5) relevant (6) helpful (7) extreme (8) enjoyable (9) means (10) process (11) particularly (12) characters (13) astonished (14) apparently 3. (1) fond of (2) is…related to (3) according to (4) To a certain degree (5) vice versa (6) no doubt (7) rid… of (8) cleare d up (9) or else (10) at all costs (11) sure enough (12) let alone (13) similar to (14) It’s no use (15) in my opinion (16) was worth (II)Increasing Your Word Power 1. (1) c (2) d (3) b (4) b (5) b (6) d 2. (1) highly/very (2) quite/very (3) quite/very/increasingly (4) quite/simply/very 3. 4.No Mistake especial→ especially
necessarily → necessary frequent → frequently No Mistake ea sily → easy No Mistake i ndividually → individual m uch → many h igh → highly a pparently → apparent r emarkably → remarkable p robable → probably No Mistake (III)Grammar Task 1: (1)would/should (2) should/would (3) might (4) would (5) must (6) can’t (7) should would (8) must Task 2: (1)We passed the afternoon very pleasantly, roller-skating in the sun and talking about our childhood under a tree. / The afternoon passed very pleasantly, while we roller-skated in the sun and talked about our childhood under a tree. (2)On entering the lecture hall, I was surprised at the size of the crowd. / When I entered the lecture hall, I was surprised at the size of the crowd. (3)When I was only a small boy, my father took me to Beijing and we had a lot of fun together. (4)To write well, a person must read good books. (IV)Cloze (1) doubt (2) efficient (3) where (4) advantage (5) afford (6) claim (7) fluently (8) qualified (9) extent (10) ridiculous (11) perfect (12) as (13) because (14) individual (V)Translation 1. Translate the sentences (1) The baby can’t even crawl yet, let alone walk. (2) Will claimed he was dining with a group of friends at the time of the murder, but in my opinion he told a lie. (3) To a certain extent the speed of reading is closely related to reading skills; and with reading skills you can cope with outside class reading better. (4) According to the regulation/rule, they both can play the game/participate in the game.
新世纪阅读教程1完整答案
Unit 1 I. Reading for information 1.B 2.D 3.B 4.C 5.A 6.C II. Translation 1. 但是只要说上几句话，他的口音就很容易被辨认出来。 2. 他不会轻易发火，有一颗金子般的心，你很少能从他的嘴里听到攻击和批评别人的话。 3. 常言道：善行胜于善言。父亲的身教对我的影响远远超过了他的言传。 4. 面对生活的沧桑，大布鲁诺怎么能不提高嗓门，怎么能保持心气平和？难道力气这么大的人不该脾气也大吗？ 5. 体育明星和歌星|、影星的确能够鼓舞人心，但是“英雄”这个头衔还是应该留给像我父亲 那样，为了自己所爱的人孜孜不卷地工作的人。 III. Summary 1.hard work, pays off 2.Big Bruno, strong in stature, a gentle spirit 3.most patient, slow to get angry, a heart of gold, a lot of friends 4. a role model, a true friend, a treasure 5.hero, does good, loves everyone, doesn’t expect anything, in return, work tirelessly, the good race I. Skimming question 1 A II. Skimming question 2 A teacher should … 1. be pleasant live and attractive 2. have a genuine capacity for sympathy 3. be both intellectually and morally honest 4. be mentally alert 5. be capable of infinite patience 6. have the kind of mind which always wants to go on learning III. Scanning question 1 4
大学英语B4试卷版 附答案
多刷题多刷题 大学英语B4 一、交际英语 1.- Hello, I'm David Chen. Nice to meet you. - _______ A.Are you? B.Nice to meet you too. C.Yes. D.Very nice. 答案：B 2.- Hello, could I speak to Mike please? - _________ A.Who are you? B.Who is speaking? C.What's wrong? D.Why? 答案：B 3.-May I move your bag a little and take this seat? -____________. A.I don't mind B.It doesn't matter C.You do it please D.Go ahead 答案：D 4.- I didn't mean to do that. Please forgive me. - _________ A.Not too bad. B.That's all right. C.It's a pleasure. D.Thank you. 答案：B 5.- It's rather cold in here. Do you mind if I close the window? - ________ A.Yes, please. B.No, please. C.Sure, please. D.I don't like it. 答案：B 二、阅读理解 People are so busy these days that many people have no time to cook. This becomes a problem, because most families love home cooking! The food tastes good and warm, and a family meal brings everyone together. In some families, meals are often the only times everyone sees one another the same time. Another reason people enjoy home cooking is that it is often a way of showing love. A parent who makes some cookies is not just satisfying a child's sweet tooth. She or he is sending a message. The message says, "I care about you enough to spend an hour cooking what you will eat
综合教程1课后答案
综合教程1课后答案 Unit 1 College Life Enhance Your Language Awareness Words in Action 1. (P.23) 1) deliver 2) polish 3) available 4) latter 5)file 6) thrive 7) undertook 8) practical 9) fulfill 10) perceived 11) accumulated 12) multiplied 2. (P.24) 1)compromise 2) self-induced 3) steered 4) frame 5)demonstrated 6) employ 7) promote 8) impressed 9)contribution 10) deliberately 11) financial 12) economic 3.(P.24) 1)makes a point of 2) refresh my memory 3) lead to 4) at hand 5) working out 6) under pressure 7) Last but not least 8) down 9) In addition to 10) were involved 11) in other words 12) pointed out 13) pay off 4. (P.25) 1) scored 2) scheduled 3) assigned 4) motivated 5) crucial 6) promote 7) perform 8) debate 9) scanned 10) devised 11) advocated 12) clarify 13) priorities 14) compromised 15) context 16) undertook Final sentence: academic excellence Increasing Your Word Power 1.( P.26~27) 1)principal/ major 2) top 3) major 4) top 5)principal 6) major 7) schedule 8)advocate/have advocated 9) top 10) approach 11)blame 12) major/ principal 13) advocate 14) schedule 15)blame 16) approaching 17) pressure 18) pace 19)pressured 20) pace Cloze (P.31) 1)academic 2) priorities 3) conducted 4) principles 5)begin 6) priority 7) compromised 8) addition 9)filling 10) Speaking 11) formula 12)Participation/ Participating 13) based 14) least 15)way 16) pressure
大学英语泛读教程第一册参考答案
大学英语泛读教程第一册参考答案 （高等教育出版社，2010年3月版） Unit 1 Chapter 1 A family sees America Together (P. 2—17) G. Blank Filling (P 11) 1. describing 2. journal 3. sign 4. websites 5. miss H. Translation (P. 12) 1. By using computers and the Internet 2. if we are friendly and helpful to others 3. learn about our country and (our) people 4. enjoyed his trip in Europe 5. on the day that/when they left Chapter two F. Word forms (p. 27) 1. a. solves (v.) b. solutions (n.) 2. a. education (n.) b. educate (v. ) 3. a. locate (v.) b. locations (n.) 4. a. construction (n.) b. construct (v.) 5. a. organization (n.) b. organizes (v.) G. Blank Filling (p. 28) 1. habitat 2. community 3. endangered 4. solution 5. For instance
大学英语4试卷及答案
大学英语4 一、单项选择题(共15小题，每题3分，共45分) 1.The color of my umbrella is different from ____ of yours.( ) A.this B.that C.it D.one 2.The old couple decided to _____ a boy and a girl thoughthey had three children of their own. ( ) A.adapt B.accept C.receive D.adopt 3.She didn’t see Smith, _______.( ) A.neither did I B.nor didn’t I C.neither I did D.so didn’t I 4.The problem _______ at tomorrow’s meeting is a verydifficult one. ( ) A.being discussed B.discussed C.to be discussed D.to discuss 5.He doesn’t know _______ to stay or not. ( ) A.whether B.if C.either D.if he will 6.People appreciate_______ with him because he has a goodsense of humor. ( ) A.to work B.to have worked C.working D.have working 7.We had some trouble _____ the house and nobody seemed_____ where it was. ( ) A.in finding; knowing B.finding; to know C.to find; knowing D.to find; to know 8.The meeting _____ over, we all left the room. ( ) A.is B.to be C.being D.would be 9.I used to sleep with the window ______.( ) A.opened B.open C.opening D.to open 10. _______ by the police, the kidnappers had no choicebut to surrender. ( ) A.surrounded B.surrounding C.having surrounded D.to be surrounded 11.____ her mother had come, her face lit up. ( ) A.Hearing B.Having heard C.When hearing D.When she heard 12.It was ______ he said ______ disappointed me. ( ) A.what; that B.that; what C.that; when D.it; when 13.I didn’t go to t he concert. But I do wish I ______ there. ( ) A.was B.had been C.were D.went
大学英语综合教程1答案
大学英语综合教程一 Unit 1 Growing Up Part II Language Focus Vocabulary Ⅰ. 1.respectable 2.agony 3.put…down 4.sequence 5.hold back 6.distribute 7.off and on 8.vivid 9.associate 10.finally 11.turn in 12.tackle 2. 1.has been assigned to the newspaper’s Paris office. 2.was so extraordinary that I didn’t know whether to believe him or not.
3.a clear image of how she would look in twenty years’ time. 4.gave the command the soldiers opened fire. 5.buying bikes we’ll keep turning them out. 3. 1.reputation, rigid, to inspire 2.and tedious, What’s more, out of date ideas https://www.360docs.net/doc/b68629783.html,pose, career, avoid showing, hardly hold back Ⅱ. https://www.360docs.net/doc/b68629783.html,posed 2.severe 3.agony 4.extraordinary 5.recall https://www.360docs.net/doc/b68629783.html,mand 7.was violating 8.anticipate Ⅲ. 1.at 2.for 3.of 4.with
泛读教程1答案-Unit1-16
Unit 1 University Student Life Section A Word Pretest 1. D 2. B 3. B 4. C 5. D 6. D 7. A 8. B Reading Comprehension l. F 2. T 3. F 4. T 5. F 6. F 7. T 8. F Vocabulary Building Word Match rationally in a way based on reason rather than emotions established accepted; recognized various different panic sudden fear consolidate strengthen assignment homework biological of living things flexible not fixed
strenuous stressful; requiring effort and energy master overall recreation way of spending free time estimate calculate roughly routine regular; usual priority first concern relaxation rest 1. flexible 2. established 3. panic 4. strenuous 5. priority 6. routine 7. Rationally 8. recreations Suffix 1. familiarize 2. visualize 3. merely 4. idealize 5. finalize 6. necessarily 7. physically 8. highly Cloze favorable their respected professors authority role expect need several changes Sec tion B
全新版大学英语综合教程1(第二版)TextB课后练习答案
全新版大学英语综合教程（第二版） 1 Text B课后练习答案 Unit One Comprehension Check 1-6 c a c d b d Translation 1. 我耳朵嗡嗡作响，听不见他们后来讲的话，只东以点西一点渗入片言只语。“，玛莎是墨西哥人,辞职,不至于,” 2. 等我意识到我这番话的意思时，为时已晚，爷爷知道我明白那不是钱的问题， 不是那个问题。 3. 第二天，我沉默不语，一副十分伤心的小女孩模样，拖着脚步走进校长办公 室。 4. 他看上去像小孩般开心，像孩子般天真无邪，可是我心里比谁都明白。 Language Practice 1. b d a f c g h e 2. resigned/ has resigned; expectation; have maintained; represents ;exception; was awarded; plus ; make it/drag himself; delicate; innocent; compare to; significance Unit Two Comprehension Check 1-7 d b a d c d d Translation 1. 火舌舔着比尔的双肩、脸和双腿，但他仅仅地抓住罗伊斯。“我不会把你丢弃在这儿的”，他说道。 2. 一辈子与居住在澳大利亚灌木地带的那些刚强的硬汉一起生活的人生经历， 将两条准则永久地铭刻在比尔心头：无论多么艰难，决不泄气、决不抛弃朋友。 3. 如果我不能挺住的话，罗伊斯就会死在那里，比尔一次又一次地告诫自己。 4. 单真正最令比尔激动的时刻是火灾发生六个月之后，刚刚出院的罗伊斯走进 尤里卡饭店，请他喝啤酒。 Language Practice 1. c e d g f h a b 2. stuff; despair; was peering/peered; soaked; swung; in good shape extent; rescue; draw on; Worse still; burst into; flinging Unit Three Comprehension Check
大学英语四主观试题及参考答案
大学英语四主观试题及参考答案 一、英译汉（每小题5分，共30分） 1.I think the picture shows us how fruits is necessary to life. 我认为这幅图展示给我们水果对于我们的生活重要性。 2.In Foreign Languages Department，a checking machine is used to correct the students' test papers. 在国外的语言机构，通过检查机器来批阅学生的试卷。 3.It's always a pleasure to see many friends here in London. 在伦敦见到朋友们总是让我很开心 4.Yeah, but they play the same songs over and over again. 是的，但是他们总是演奏同样的曲子一遍又一遍。 5.Apples here like water and sunshine. 这里的苹果像水和阳光。 6.Do you think students should do a part-time job? 你认为学生是否应该做兼职？ 二、写作（每小题15分，共30分） （一）、.建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。 1.学习方法对英语学习的重要性； 2.你的英语学习方法。 How to Learn English Well？ （二）、建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。1．回忆值得记忆的一天； 2．说明为什么值得记忆。 A Day to Remember
英语泛读教程1答案(精编文档).doc
【最新整理，下载后即可编辑】 Unit 1 University Student Life Section A Word Pretest 1. D 2. B 3. B 4. C 5. D 6. D 7. A 8. B Reading Comprehension l. F 2. T 3. F 4. T 5. F 6. F 7. T 8. F Vocabulary Building Word Match rationally in a way based on reason rather than emotions established accepted; recognized various different panic sudden fear consolidate strengthen assignment homework biological of living things flexible not fixed strenuous stressful; requiring effort and energy master overall recreation way of spending free time estimate calculate roughly routine regular; usual priority first concern relaxation rest 1. flexible 2. established 3. panic 4. strenuous 5. priority 6. routine 7. Rationally 8. recreations Suffix
大学英语4试卷及答案
大学英语 一、单项选择题?共 小题，每题 分，共 分? ??? ??●?? ?? ?? ◆????●●? ?? ????????? ???? ???? ?? ??◆???? ? ?????? ?????? ???? ????? ???? ?●? ??◆?●? ??????? ?? ????? ? ??? ??? ? ???● ???◆?????? ??? ????? ???●???? ?? ????? ???? ? ???????? ???????? ????????? ??????? ??? ?????? ??? ?????? ????????? ? ????????? ??? ? ????? ?????? ? ????????? ? ??? ???? ?????? ? ??? ????●?? ??????? ?? ?????????? ??????? ?? ? ??????????◆●? ???? ? ? ??????? ????◆???? ??????◆???? ???? ?? ????◆???? ???? ????◆?? ??? ??????? ???? ??????? ?? ???? ?? ???? ? ?????????? ???? ???????? ???? ?? ??●● ?????●? ????????????????? ???? ??? ????◆?? ?? ??? ? ????????? ?? ?◆???? ? ? ???? ???? ???? ???? ?????? ????????? ?????? ??????? ?? ??? ???? ???◆?●? ????? ??? ??◆?? ??? ?????? ??????????? ????? ?? ???? ? ? ???? ???????? ??????? ?????????? ?? ???? ???? ????? ??????? ???? ????? ?? ????