大学英语(1)期末在线考核剩余时间:1小时57分钟10秒已完成0%(共27题,还剩27题) 单选题(共25道题)
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收起1.(2.0分)
(交际用语)
—which one do you prefer, the window seat o r the aisle seat?
—____A_________
A、I prefer a window seat.
B、I like neither.
C、Both will do.
D、I don’t know.
2.(2.0分)
(交际用语)
—Would you mind doing me a favor now?
—_____C_______
A、No, of course.
B、Yes, help yourself.
C、No, of course not.
D、Sure, go ahead.
3.(2.0分)
“Did you enjoy last night’s concert?”
“Yes. Though the last piece____A_____rather poorly.”
A、was played
B、played
C、was playing
D、playing
4.(2.0分)
Middle school boys ____C_________ not to smoke.
A、always tell
B、are told always
C、are always told
D、is always told
5.(2.0分)
(交际用语)
—You’ve won the ba sketball game. Congratulations!
—_______C_____
A、Oh, not really.
B、No one else could do it.
C、Thank you. We’re really lucky.
D、It’s good of you to say so.
6.(2.0分)
Such problems_______D___________ as soon as possible.
A、have solved
B、have been solving
C、have to solve
D、have to be solved
7.(2.0分)
He___D_______ the Communist Party_____________2002.
A、has joined, in
B、has joined, since
C、joined, on
D、joined, in
8.(2.0分)
(交际用语)
—It’s really nice of you to give me a h and in time!
—______D______
A、Thank you.
B、No, no.
C、With pleasure.
D、It’s my pleasure.
9.(2.0分)
Kate said that _____A_______.
A、she had finished writing the composition the night before
B、she had finished writing the composition last day
C、I finished writing the composition on the last night
D、she finished writing the composition before the night
10.(2.0分)
The event ____B_____at the time last year.
A、happens
B、happened
C、is happened
D、was happened
11.(2.0分)
(交际用语)
—Hello, this is David speaking. Is Michael there?
—________A________
A、Hold on. I’ll get him.
B、No, he isn’t.
C、Yes, I am David.
D、Yes, what do you want?
12.(2.0分)
(交际用语)
—You look tired. What’s the matter?
—______B________
A、It doesn’t matter.
B、Oh, my head aches badly.
C、It is not the matter.
D、Don’t worry.
13.(2.0分)
(交际用语)
—Mary, help yourself to some salad.
—________C____
A、I don’t like salad.
B、Sorry, I can’t help.
C、Thanks, but I’ve had enough.
D、No, I can’t.
14.(2.0分)
(交际用语)
—Mr. Smith, must we hand in our composition next Monday?
—________B____
A、Yes, you will.
B、Yes, you must. It’s the deadline.
C、No, you mustn’t.
D、You can wait.
15.(2.0分)
we all believe that computer ___D________ smaller a nd smaller in the coming years.
A、can be become
B、will be got
C、will be changed
D、can turn
16.(2.0分)
It ________D_______years since I last saw you.
A、was
B、is
C、will be
D、has been
17.(2.0分)
by the end of 2020 china _____D________much stronger a nd richer.
A、will become
B、would become
C、is becoming
D、will have become
18.(2.0分)
(交际用语)
—How soon do you want to leave for the picnic?
—_______D_____
A、sooner o r later.
B、Be quick.
C、As I like.
19.(2.0分)
David_____D_______ himself while he __________the machine.
A、hurted…was fixing
B、hurts…is fixing
C、hurt …fixed
D、hurt …was fixing
20.(2.0分)
(交际用语)
—Excuse me,Sir. Could you hold the suitcase for me?
—_______D_____
A、It’s a pleasure.
B、My pleasure.
C、I could.
D、With pleasure.
21.(2.0分)
If you study hard,you _____D________ the examination.
A、has passed
B、are passing
C、have passed
D、will pass
22.(2.0分)
He_____D________ not to leave waste paper in public places any more.
A、warns
B、warned
C、is warned
D、was warned
23.(2.0分)
Jack_____D____in the street when I_________ on him.
A、walked…called
B、was walking …was calling
C、walked …was calling
D、was walking …called
24.(2.0分)
If you ____C____quiet, I’ll tell you what happened.
A、be
B、are to be
C、are
D、will be
25.(2.0分)
Since computers were invented, it ______B____ that they are indispensable for scientific research.
A、thought
B、has been thought
C、is thinking
问答题(共2道题)
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收起26.(30.0分)
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▆■■■■■■■■■■■■ A.It doesn’t matter. B. Oh, my head aches badly. C. It is not the matter. D. Don’t worry. 10. — Have you ever been to the Great Wall in Beijing? —__________ A. Yes, I am . B. No, I don’t. C. No, I’ve never been there. D. Certainly, I went there. 三、语法与词汇：30%(答案必须填在答卷表格里,否则不得分) 1. We all believe that computer ______ smaller and smaller in the coming years. A. can be become B. will be got C. will be changed D. can turn 2. He ___________________ not to leave waste paper in public places any more. A. warns B. warned C. is warned D. was warned 3. That factory _________ nearly 50 years ago. A. has been built B. had built C. was built D. has built 4. Don’t worry. Everything will _____________ in time. A. be finished B. finish C. finished D. be finishing 5. Her application for the position _______________ by the boss. A. was refused B. was refusing C. refused D. is refusing 6. He__________ the Communist Party_____________2002. A. has joined, in B. has joined, since C. joined, on D. joined, in 7. Jack_________ in the street when I_________ on him. A. walked…called B. was walking …was calling C. walked … was calling D. was walking …called 8. “Where is Mary?” “She__________ to school.” A. will go B. has been C. has gone D. went 9. This time last year I___________ my holiday in the countryside. A. have B. was having C. am having D. have had 10. I’m sorry that I__________ you had been there already. A. won’t know B. didn’t know C. don’t know D. haven’t known 11. By the end of 2020 China _____________ much stronger and richer. A. will become B. would become C. is becoming D. will have become 12. It _______________ years since I last saw you. A. was B. is C. will be D. has been 13. I __________ my homework now. A. finish B. finished C. have finished D. had finished 14. The room _____________ often cleaned by the worker. A. has B. will be C. was D. is 15. The railway ______________ in three years. A. is complete B. will completed C. has completed D. will be completed 四．英译汉：30% Drinking habits vary widely among Americans. Some families never serve any drinks, others have them before dinner, or perhaps after dinner. You are more likely to be offered a cocktail before dinner than wine with the meal. If you do not get used to American cocktails, you can ask for something else. Moreover, drinks may be poured over ice. （翻译答案必须填写在第1页答卷上，不要在此处答题，否则不得分）
电子信息专业英语复习资料 一、基本术语（英译汉） 1.probe探针 2.real time operational system 实时操作系统 3.debugger 调试器 4.sourse code 源代码 5.software radio wireless LAN 软件无线电网络 6.base station 基站 7.top-down approach 自顶向下分析法 8.variable 变量 9.data compress 数据压缩 10.signal conditioning circuit 信号调理电路 11.Chebyshev Type Ⅰfilter 切比雪夫Ⅰ型滤波器 12.vertical resolution 垂直分辨率 13.device driver 设备驱动 https://www.doczj.com/doc/009686378.html,piler 编译器 15.template 模板 16.concurrent process 并发进程 17.object recognition 目标识别 18.Discrete Time Fourier Transform 离散傅立叶变换 https://www.doczj.com/doc/009686378.html,bined circuit 组合逻辑电路 20.impedance transform 阻抗变换器 21.voltage source 电压源22.passive component 无源器件 23.quality factor 品质因数 24.unit-impulse response 单位脉冲响应 25.noise origin 噪声源 26.Domino effect 多米诺效应 27.output load 输出负载 28.cordless phone 无绳电话 29.Antenna 天线 30.harmonic interference 谐波干涉 31.Parallel Resonant 并联谐振 32.voltage control oscillator 压控振荡器 33.adaptive delta modulation 自适应增量调制 34.amplitude modulation 调幅 二、缩略语（写出全称） 1.LSI：large scale integration 2.PMOS ：p-type metal-oxide semiconductor 3.CT：cycle threshold 4.MRI：magnetic resonance imaging 5.ROM：read-only memory 6.DRAM ：dynamic random access memory 7.TCXO ：temperature compensated X'tal (crystal) Oscillator https://www.doczj.com/doc/009686378.html,B：Universal Serial Bus 9.DCT：discrete cosine transform
1.How can we keep friendship alive. Friendship is absolutely crucial for us. We have to do hard work to build up and sustain friendship. Here are some important ways to keep friendship alive .First of all, let your friends know that you care about them. If you can't be there at the given moment, say something like, I wish I could be with you. May I call you tomorrow? Be sure your friend knows she's cared about. Second, try to be with your friends when they are in trouble. Remember troubled people are most in need of their friends to stay around. The last but not the least, keeping friendship alive is to say to your friends I miss you and I love you . Remember? 2.Is it right for college students to have tattoos? Nowadays many college students like to highlight their personalities, to be their own. They have taken special ways to show their personalities. For example, some college students who are tattooed think tattooing is cool and shows great personality. But teachers and parents do not think tattooing is right for students. They believe to be a student you should dress like a student--no tattoos, of cause. Some people even believe that those who are tattooed are not good students. As far as I am concerned, although many people can not accept students' tattooing, nothing is wrong with tattooing. College students are grown-ups. They can tell right from wrong. If they want to be tattooed, just remember to tell them to select clean places, preferably with parental consents. 3.What do cultural difference mean ? Can you give some examples? Cultural differences mean differences among people in ways of thinking, life, aesthetic concepts, social practices, diet and etc. Let's talk about, for example, eating habits in different areas. In China, people prefer vegetables and fruits, for the Chinese believe that such things are rich in vc, which are good to health. However, western people are more likely to eat meat. Known as having a good tradition of hospitality , Chinese people always greet their guests with warm hand. Chinese meal table normally is filled with delicious food, yet the host is used to saying I am sorry. I don't think the food is good enough today and other courtesies. Host or hostess sometimes use their chopsticks to take food to the guest's bowl, which is considered as a way to show hospitality in China. However, in western countries, people emphasize respect to individuality. At dinner, people eat whatever they like or we say they eat at their own will. th birthday is one of the most important days in your life? Give reasons. 4.Do you consider your 18th birthday is considered the most important. Each birthday means a new year. I am most concerned about Yes, 18my 18th birthday as it is a sign of adulthood, indicating that I am no longer a child, but one who can try to do things independently and should be reliable for his or her own actions as an adult. Since my eighteenth birthday, I am entitled to go shopping alone, to travel alone and to live independently. I still remembered my 18th birthday. After my birthday celebration, I suddenly felt grown up, both physically and mentally. Birthday to me is an important turning point, enabling me to learn and think independently. So far as I am concerned about each birthday, I usually feel better. 5. Is money the most important thing in your life ? If not, what is it? No, money is not the most important thing in my life. I think the most important thing in life is love. First, everything is born of love. When a child is born, his parents give him or her lots of love in creating a healthy environment for him or her. Secondly, what society needs is also love, if there is no love among members in society, it will become listless apathy. Third, though money can buy something, it can not give or buy love. Love yourself and 8
福建师范大学网络教育 大学英语期末考试卷A Coca-cola standardization office【ZZ5AB-ZZSYT-ZZ2C-ZZ682T-ZZT18】
1. — Hello, this is David speaking. Is Michael there — ________________ A. Hold on. I’ll get him. B. No, he isn’t. C. Yes, I am David. D. Yes, what do you want 2. — Which one do you prefer, the window seat or the aisle seat —_____________ A. I prefer a window seat. B. I like neither. C. Both will do. D. I don’t know. 3. — Mr. Smith, must we hand in our composition next Monday —____________ A. Yes, you will. B. Yes, you must. It’s the deadline. C. No, you mustn’t. D. You can wait. 4. — You look tired. What’s the matter —______________ A. It doesn’t matter. B. Oh, my head aches badly. C. It is not the matter. D. Don’t worry. 5. — Mary, help yourself to some salad. —____________ A. I don’t like salad. B. Sorry, I can’t help. C. Thanks, but I’ve had enough. D. No, I can’t. 6. —You’ve won the basketball game. Congratulations!—____________ A. Oh, not really. B. No one else could do it. C. Thank you. We’re really lucky. D. It’s good of you to say so. 7. — Would you mind doing me a favor now —____________ A. No, of course. B. Yes, help yourself. C. No, of course not. D. Sure, go ahead. 8. — Excuse me, Sir. Could you hold the suitcase for me —____________ A. It’s a pleasure. B. My pleasure. C. I could. D. With pleasure. 9. —It’s really nice of you to give me a hand in time! —____________ A. Thank you. B. No, no. C. With pleasure. D. It’s my pleasure. 10. — How soon do you want to leave for the picnic —____________ A. Sooner or later. B. Be Quick. C. As I like. D. In an hour. 三、语法与词汇：30%(答案必须填在答卷表格里,否则不得分) 1. Kate said that ____________. A. she had finished writing the composition the night before B. she had finished writing the composition last day C. I finished writing the composition on the last night D. she finished writing the composition before the night 2. “Did you enjoy last night’s concert” “Yes. Though the last piece _________rather poorly.” A. was played B. played C. was playing D. playing 3. He__________ the Communist Party_____________2002. A. has joined, in B. has joined, since C. joined, on D. joined, in 4. Jack_________ in the street when I_________ on him. A. walked…called B. was walking …was calling C. walked …was calling D. was walking …called 5. David ____________ himself while he __________the machine. A. hurted… was fixing B. hurts… is fixing C. hurt …fixed D. hurt … was fixing 6. The event _________ at the time last year. A. happens B. happened C. is happened D. was happened 7. Since computers were invented, it __________ that they are indispensable for scientific research. A. thought B. has been thought C. is thinking D. had thought 8. We all believe that computer ___________ smaller and smaller in the coming years. A. can be become B. will be got C. will be changed D. can turn 9. He ___________________ not to leave waste paper in public places any more. A. warns B. warned
bar graph n.条形图 equalization n.均衡化;均等 image contrast n.图像对比度 addition n.加 subtraction n.减 lapse v.流逝, 失效, 下降 time-lapsed (时间上)相继的 matrix n.矩阵 motion n.运动, 动作v.运动 dimension n.维数 convolution n.回旋, 盘旋, 卷积boundary n.边界, 分界线 blur v.涂污, 污损, 使……模糊, sharp adj.锐利的, 锋利的, 明显的 locate v.定位, 位于 spectra n.范围, 光谱 spectrum n.光谱, 频谱 phase spectrum相位频谱 magnitude spectrum幅度频谱 facsimile n. 传真,摹写,影印 lossless compression（压缩）无损压缩lossy compression 有损压缩irretrievably adv.不能挽回地, 不能补救地CT (computed tomography) 计算机断层造影 MRI (Magnetic Resonance Imaging ) 核磁共振成像 DCT (discrete cosine transform)离散余弦变换 run-length encoding行程编码 Huffman encoding霍夫曼编码 Image contrast图像对比度Edge filter边缘滤波Edge detection边缘检测Object recognition目标识别 Run-length encoding行程编码Huffman encoding哈夫曼编码Pixel 像素 Gray scale image 灰度图像Gray scale level灰度级Histogram 直方图 Bar graph条形图Histogram equalization直方图均衡encryption program 加密程序deletion command 删除命令authorized user 授权的用户backup copy 备份的副本voltage surge 电涌，浪涌电压circuit breaker 断路器 electronic component 电子器件 data-entry error 数据输入错误electronic break-in 电路中断 power line 电力线，输电线EC:Electronic Commerce 电子商务Electronic Data Interchange (EDI)电子数据交换 Electronic Funds Transfer (EFT)电子资金转账 embedded system 嵌入式系统 radio frequency 射频 schematic原理图 capture记录,输入 building block模块,构件 EDA (Electronic Design Automation)电子设计自动化 HDL: Hardware Description Language 硬件描述语言 Full-custom IC（全定制集成电路）
广东外语外贸大学成人高等教育 商务英语（专科）2018学年第1学期 《商务英语阅读》试题（A 卷） 年级： 考试形式：闭卷 考试时间：90分钟 Part I Multiple Choices (15 points, 1 point each) Direction : There are 15 incomplete sentences in this part. For each sentence there are four Choices 1. The fifth generation computers, with artificial intelligence, _______ and perfected now. A. developed B. have developed C. are being developed D. will have been developed 2. Y ou _______ her in her office last Friday; she’s been out of town for two weeks. A. needn’t have seen B. must have seen C. might have seen D. can’t have seen 3. She’s always been kind to me – I can’t just turn ______on her now that she needs my help. A. my back B. my head C. my eye D. shoulder 4. Careful surveys have indicated that as many as 50 percent of patients do not take drugs _______ directed. A. like B. so C. which D. as 5. The _______ goal of the book is to help bridge the gap between research and teaching, particularly the gap between researchers and teachers. A. joint B. intensive C. overall D. decisive 6. W e can accept your order _______ payment is made in advance. A. in the belief that B. in order that C. on the excuse that D. on condition that 7. The medical experts warned the authorities of the danger of diseases in the _______ of the earthquake. A. consequence B. aftermath C. results D. effect 8. Research universities have to keep up with the latest computer and scientific hardware _______ price. A. on account of B. regardless of C. in addition to D. not to mention 9. I am surprised _______ this city is a dull place to live in. A. that you would think B. by what you are thinking C. that you should think D. with what you were thinking 10. Don’t let the child play with scissors _______ he cuts himself. A. in case B. so that C. now that D. only if 11. They always give the vacant seats to _______ comes first. A. whoever B. whomever C. who D. whom 12. Doing your homework is a sure way to improve your test scores, and this is especially true _______ it comes to classroom tests. A. when B. since C. before D. after 13. Personal computers are no longer something beyond the ordinary people; they are _______ available these days. A. promptly B. instantly C. readily D. quickly 14. Owing to _______ competition among the airlines, travel expenses have been reduced considerably . A. fierce B. strained C. eager D. critical 15. Doctor often ______uneasiness in the people they deal with. A. smell B. sense C. hear D. tough Part II Word Match (15 points, 1 point each) Direction : Match the following words with their definitions within each group of five words. Write Group 1 1. authentic A. having powers of learning, reasoning or understanding 2. commitment B. twist; changing shape 3. exaggerate C. a promise or decision to do something 4. intelligent D. real; true and accurate 5. distortion E. say more than the truth about something Group 2 6. authority A. basic; central; forming the necessary basis of something 7. donate B. something that is considered more important than other matters 8. substantial C. the right or ability to control 9. priority D. give something for the benefit of others 10. fundamental E. large in size, value or importance Part III Sentence Completion (10 points, 1 point each) 1. George is not only a skillful painter, but also a ______ writer. (talent) 2. The ________ John to Mary was announced in the newspapers yesterday . (engage) 3. I love the movie because the _______ is my favorite. (act) 4. _______ to say , this absent-minded professor left his umbrella in the classroom again. (need) 5. I'm afraid the girl is a little ________ for her age and height. (weight)
新课程实验八年级英语期末考试评价参考资料（一） Units 1-3综合练习 Class Name No.__________ I.词汇。（15分） A．据句意写出单词,部分单词首字母已经给出，（10分） 1.Here are the t________ to the ball game . 2.March 8 is __________ Day . 3. A _______ cut men’s hair . 4. A UFO l______ right in front of me while I was walking along the street . 5.I have my hair cut . Do you like my _________. 6.How are you _____ on with your neighbour ? 7.My clothes are out of _____ . I should buy come new clothes . 8.People will have r______ (机器人)in the future . 9.Sally was in high school five years ago , but now she is in the c________. 10.Mother is busy cooking in the k_________ . B. 选用恰当的词组并用其正确的形式填空。(5分) come true , take place , agree with , run away , take off , 1. I think Xiamen is more cleaner than Longyan. Do you __________ me ? 2.His dream ________ at last . 3. A car accident _________ last night . 4.Do you know when the plane _____________ next Monday ? 5.The bad man saw the police , and ____________ quickly . II. 选择填空。（20分） ( )1.If you want to be thinner and healthier you’d better eat ____ food and take _____ exercise . A. fewer, more B. more , less C. little , much D. less , more ( )2. There will _____ pollution in 100 years ? No , there ______. A. have less , isn’t B. be more , won’t C. be more , will D. has more , won’t ( )3. There are many tall trees on ____ side of the street . A. both B. all C. either D. neither ( )4. --- Could you come, please ? I want some help . --- ________________.
大学英语（1）第三次网络作业 (三次网络作业的平均成绩占期末考试成绩30%，作业一经批改评分，将不能修改；此次作业完成后应交到“在线作业”一栏本次作业界面中；作业必须按最后一页答卷表格格式作答，不要以附件形式缴交) 一、交际用语对话练习：（针对每个对话未完成的部分选择最适当的答案） 1. — Please help yourself to the seafood — _______ a. Thanks, but I don?t like the seafood. b. Sorry, I c an?t help. c. Well, seafood don?t suit for. d. No, I can?t. 2. — Can you go to the concert with us this evening? — _______ a. No, I already have plans. b. I?d love to, but I?m busy tonight. c. No, I really don?t like being with you. d. I?m ill, so I shouldn?t go out. 3. —Congratulations! You won the first prize in today?s speech contest. — _______. a. Yes, I beat the others. b. No, no I didn?t do it well. c. Thank you. d. It?s a pleasur e. 4. — Must I take a taxi? — No, you _______. You can take my car. a. had better to
1.Types of Business Organization: 1)Sole Proprietorship :an unincorporated business owned by one person 2)Partnership :owned by two or more individuals (called partners) a)Limited partnership——general partners,limited partners 3)Corporation :a legal entity separate from its owners 2、Separation of Ownership and Control (pros and cons)： Pros(赞成的理由): Specialization，Efficiency，Diversify，Going concern Cons(反对的理由)：Four major downsides：agency problem,free-riding problem,increased costs of information https://www.doczj.com/doc/009686378.html,rmation asymmetry 3.Overview of Financial Statements balance sheet; income statement;statement of cash flows;statement of retained earnings 4. Statement of Retained Earnings,it shows: the retained earnings balance at the start of the period;how much the firm earned (net income); how much dividends the firm paid;how much net income was reinvested back into the firm (retained earnings);any repurchases of the firm’s stock;any new issues of the firm’s stock; andthe retained earnings balance at the close of the period. 4. Statement of Cash Flow:Operating Cash Flows ，Investing Cash Flows ，Financing Cash Flows 5.Analyzing Financial Ratios Financial ratios are not standardized. Analyzing a single financial ratio for a given year may not be very useful. Some of a firm’s financial accounting practices or choices will affect its financial statements and, finally, its financial ratios. Financial ratios do not provide analysts with all of th e answers about a firm’s condition. 7. Uses and Limitations of Financial Ratio Analysis：while ratio analysis can provide useful information concerning a company’s operations and financial condition, it does have limitations that necessitate care and judgment 1.Risk-return tradeoff Investors will take on additional risk only if they anticipate high return. 2.Time value of money A dollar available today is worth more than a dollar available at a future date. This is because a dollar today can be invested to earn a return. 3.Types of value Going-concern value,Liquidation value ,Book value ,Market value ，ntrinsic value 4.Valuation Approaches discounted cash flow (DCF) valuation，relative valuation，contingent claim valuation，option-pricing models 7.Contractual Provisions of a Typical Bond Par Value,and Coupon Rate,Maturity,Call Provisions,Sinking Fund Provisions,Conversion Rights ,Put Provisions,Indenture,Trustee,Collateral,Bond Rating 1.Introduction to Risk and Return All financial assets are expected to produce cash flows, and the risk of an asset is judged by the risk of its cash flows. Here are two assumptions about risk and return: Assumption (1): The returns from investments are normally distributed.Assumption (2): Investors are risk-averse. The risk of an asset can be considered in two ways: (1) on a stand-alone basis (2) in a portfolio context. In a portfolio context, an asset’s risk can be divided into two components: a,diversifiable risk ;b. market risk.An asset with a high degree of relevant (market) risk must provide a relatively high expected rate of return to attract investors. 4.Efficient Market Hypothesis (EMH) Assumption 1:The returns from investments are normally distributed.Assumption 2: Investors are risk-averse.Assumption3:Investorsare rational.Assumption4:Investors are price takers.Assumption 5: The Efficient Market Hypothesis (EMH) holds. 5. Three types of financial market efficiency: allocationally efficient, operationally efficient,informationally efficient 6. Three main factors associated with informational market efficiency The type of information to which the market price reacts,The speed at which the market price reacts to information,The degree to which market participants over-or under-react to information 8. Characteristics of an Informationally Efficient Market Price changes cannot be predicted. The price of the asset is equal to its fundamental (unobserved but true) value.Prices change due to the inflow of new information, and information flows randomly to the market.Therefore, price changes should be random and unpredictable. 10. Modern portfolio theory —Markowitz’s Mean-variance Framework ,Efficient portfolios are those that have: the lowest risk for an expected rate of return; or the highest expected rate of return for a given level of risk.The assets that meet these criteria make up the efficient frontier.