Unit 3-1 listening偷窃They were locked up the safe and the only way to open the safe was with an 8-digits access code. Whoever got in the safe, must have back code.As far as he knew, nobody else had it, or have ever asked to use it to get something from the safe. Only 2 people in the company were authorized to have the code. He had the code of course, and so did his assistant, Sylvia. There was no reason for Salvia to take the documents, so he couldn’t imagine that it was her. That would make sense and she was completely trustworthy.So somebody else must have the code and stolen the document.She had a notoriously bad memory so she kept a lot of notes.But Sylvia wasn’t that care less or irresponsible.She had probably stored the code somewhere on her computer and the theft was able to get it from there.But who could he have been. Suddenly, he realized that there was a new IT guy in the office. He maintained the company’s compu ter network and provide technical support for the staffs. Perhaps he was the guilt he wanted. If anyone could have done it, he certainly had the skills. He was a security expert and he had helped Sylvia stored something on her computer last week.Then john realized that nobody had done a proper background check on the guy. One of other engineers in the company had recommended him and he seemed nice. They had been in a hurry to hire someone for the position so they didn’t check this background very carefull y. Suddenly, he had a bad feeling. immediately, he used his smartphone to check the company’s bank accounts. To his horror, he found that a large amount of money was missing from one of his accounts. There had a large withdraw earlier that morning, more than 75 thousand dollars. He then discovered that the money had been wired to an account in another country. So not only did the IT guy get the access code for the safe, but he also got the lodge information from the bank. This was a disaster. John immediately called the police and reported the incident. He also called the bank to see if they could stop the transaction. Unfortunately, they said it was too late. the transaction had gone through. Just then, john got an email with the subject line, from the IT guy. It showed smiley face and said thank you for being so stupid. Don’t waste your time trying to find me. I’ve left the country and will never return. Be thankful that I didn’t everything in t he account. This should a good lesson for you. It was signed, your IT guy.Unit 3-1 dialogue评论和建议Well, what did you think of my presentations.Did you want me to be frank? I know we work very hard on it.Yes, give me to it straight. I have my own opinion too. But I appreciate your comments and suggestions.You said you had your own opinion about it. so how do you think of them.I thought it went ok at first. But I could feel there were some bad transitions(过渡).I think I spent too much time on some slides and didn’t express them well.I agree on most points. But to me, it was flat. 5 minutes into it I had a hard time paying attention. Flat? Do you mean my voice?Yes, that’s part of it. there is very passion almost like you were reading it. I’m sure you can do better.Do you have any suggestions?First, let me say I like the slides themselves. The designs were nice and easy to read. But one thing you didn’t do was engage with the audience. You focus on your slides and didn’t address your audience.Oh, I was trying to but I guess I was too nervous. I didn’t want to forget anything.You have a great smile. You need to show that smile and expressions when you present. Make eye contact.When you present, I notice you always do that and your pause between ideas. But it seems so easy for you.For me, I look at the faces in the audience. I watch their expressions. I really try to communicate with them. Once I do that, it comes naturally, because it becomes real communication.You seem to enjoy it.Well, I’m always nervous too before I get started. But once I contact with the audience, I’m ok. So contacting with the audience is the key. Focus on them and not me, right?Yes, well put. In fact, if you do that, you will have to adjust your presentation. It has to flow like in a read conversation. We have to respond to each other. And the pauses are so that the presentation can breathe.Hmm, it seems so obvious. But I’ve never thought of it like that. That’s a great advice. I wish we had talked before my presentation.If we had, you may not have been open like you are now. anyway, I’m sure your next presentation will improve. It takes practice like anything. Don’t be too h ard on yourself.No, I won’t. But next time I will do better and I hope you there.OK, well, let’s get back to work.Unit 3-1 Reading化石能源和哲学悖论Depletion of fossil fuelsAnumber of scientists are emphasizing the tremendous challenges that will soon be faced when the depletion of fossil fuel supplies coincides with(恰逢) an alarming increase in the global population. They highlight agriculture which is heavily dependent not only on gasoline to fuel machinery, but also on the petrochemicals necessary to manufacture synthetic(合成的) fertilizers and pesticides. Without these petrochemicals, crop yields would be only a fraction of what they are today. To assume that an abundant source of renewable energy will address this challenge is to ignore the vital non-fuel uses of petrochemicals.Then there is the challenge posed to the current levels of mobility. As a fuel, gasoline is unrivalled(无敌的) in its portability. Electricity requires bulky batteries and hydrogen is notoriously difficult to store. Biofuels might seem like an alternative, but the energy consumed when converting corn into bioethanol, for instance, greatly exceeds the output when the fuel is utilized. In any case, once we reach a crisis in the food supply, it will not make sense to divert food crops to other uses. Although there seems to be a widespread belief that the era of oil dependency is coming to an end due to some technological remedy(补救方法), this may be mistaken. Relying on such an assumption can lead to complacency(自满) and a failure to take precautions(预防措施). Experts may not be able to come up with solution that can lead to a pain-free transition. Scientists warn that relying on alternative resources might only support half of the global population. The absence of realistic alternative to fossil fuels will mean that the first priority will be to curb the demand for food.Petrochemicals are used to manufacture pesticides, which are good for agriculture.The meaning of catch 22One of the most interesting books of the 20th century was the novel, Catch 22. In the novel, the term has nothing to do with catching anything. It has a much deeper meaning, and it describes a kind of logical conundrum(难题) that’s worth exploring.First, it’s important to put the phrase into context. In the novel, a group of American bomber pilots is on an island in the Mediterranean. They face death almost every day when they fly their bombing missions. Many have already lost their lives; the remaining pilots know that it is only a matter of the time before they will be the next victims.One of the characters in the novel is a doctor. It is his job to see that the pilots are fit to fly. In particular, there is rule that says he has to ground anyone who is crazy. To ground them means to remove them from active duty so that they don’t fly.Some of the men believed in the principles they were fighting for. They were willing to give their lives for their country. But to others, this was crazy. They thought the whole thing was insane. One of them, Yossarian, wanted out. He was friends with the doctor, and he wanted the doctor to ground him.When Yossarian asked the doctor to ground him, the doctor replied: “you’re wasting your time, you’re not crazy”.Yossarian told him to ask one of the other pilots, Cleving er, to tell him how crazy he was. “There is no point. He’s crazy.” The doctor replied.” Crazy people can’t decide whether you are crazy ornot.”“Clevinger isn’t crazy! he’s one of the sanest pilots here.”“So he’s obviously out of his head,” said the Doc.“He’s got to be close calls he’s had.”“well, if he’s crazy, why don’t you ground him?”“I can’t unless he asks to be grounded. That’s part of the rule.”“So all he has to do is ask?”“no, then I can’t ground him.”“So there is a catch,” said Yossarian, t rying to get things straight.“Sure, there’s a catch,” said the Doc, with a slight smile. “Catch 22. If he asks, then he can’t be crazy. Only those who are crazy are grounded.”“there’s some catch,” observed Yossarian.“it’s the best there is, ”the Doc rep lied.Unit 3-2 listening流行病Despite advances in technology, one of the biggest threats to human survival comes from primitive(原始的) lifeforms. Infectious diseases are caused by microorganisms, such as bacteria, virus and parasites(寄生物). These organisms have no access to education or technology, but they present a huge challenge to humanity. That’s because they are adaptable. Just as adaptability has helped humans survive, it makes it more difficult to control infectious diseases. As conditions change, the organism which caused these diseases adapt and become stronger. There are several kinds of infectious diseases.Bacterial infections such as pneumonia(肺炎), are caused by bacteria. these infections can be treated by antibiotics(抗生素), which kill the bacteria. viral infections are caused by virus, such as the influenza virus. These can sometimes be treated by vaccines, such as flu vaccines. An example of parasitic(寄生虫的) infection is malaria(疟疾). Malaria is caused by parasites transmitted to humans by infected mosquitoes. Once inside the body, the parasites can be difficult to kill or control. And also, these parasites are also adaptable.How serious are infectious diseases. Considered what happened in 1918, the influenza pandemic(流行病). It started in the fall of 1918 with what seemed to be something no more serious than a common cold. In the next 2 years however, it infected a fifth of the world’s population. In fact, it turned out to be the most deadly epidemic in history, killing between 20 and 40 million people. The influenza virus that caused it was much stronger than previous influenza viruses. Its molarity rate was 2 and a half percent compared to a point 1 percentin previous epidemic viruses. Its stuck quickly with no mercy, sometime killing people within hours. School and business closed in many places, and people wore masks to prevent the transmission of the virus through the air. What was unusual about this pandemic was that it was most deadly for people age 20 to 40, rather than the elderly and young children.Now a century later, we have flu vaccines that have reduced the severity of the epidemics. These vaccines needed to be updated every year because the virus changes and new strange immerge. What researchers fear is that a new strange will developand cause another pandemic. Once an outbreak occurs, transmission of the disease will be even faster than the before. An unattempt consequence of our improved transportation system will be the speed in which an epidemic can spread. Experts predict that the public health systems will be overwhelmed and unable to react quickly enough. So the best defense will be to prevent an outbreak from occurring. This will require global cooperation and the sharing of data. It may also require changes in how humans interact with animals. Animals such as birds and pigs carry viruses that may mutate(变异、突变) into a strain(一株) that can infect humans. Such a new strain could lead to another pandemic well before a new vaccine could be developed. Since diseases epidemic don’t stop at national boarders, this is a global issue requiring a global action. The threat of a global epidemic is another example of why we must learn to live together.Unit 3-2 dialogue 子女教育方式You know, my husband and I are having a terrific fight over how to rise our son.What about?He’s only 4 years old.My husband I’m putting too much pressure on him. He thinks it’s wrong thing to do.I wouldn’t know. I’ve not even married yet. That’s my problem. I wish I had a husband to disagree with.Well, he thinks it’s important for kids to have time to be bored.Bored?Yes, he really said that. Can you believe it?Why did he think so? Did he have time to be bored when he was a boy.Well, he grew up in the countryside. He said he had to find things for himself to do. He feel sorry for his kids these day because their days were so structured.Hmm, I see it’s point. But things have changed a lot since he was a boy.That’s exactly what I told him. Then he started to get angry.That does n’t sound like him. He’s usually so calm and reserved. In fact, I can’t ever remember he and his express in opinion.Well, the other day our boy said he didn’t like one of our teachers. It’s a English t eacher. And then that got my husband’s attention.What happened?He got angry and he said he wasn’t happywith all the emphasis on English and math. He said I should find some places for our boy to do more of what he wants to do. He said he’d find the class the teacher who encourages kids to explore things.That sounds a bit idealistic.That’s what I told him.Then he said it’s important to learn how to be independent and not always depend on being told what to do. He said that can develop creativity and the love of learning.Certainly. What happens when he is behind of other kids in school? won’t he be discouraged?He said he wanted the boy to deal with it and see what happens.Some people are more competitive and some aren’t.Anyway, it’s an interesting point of view. It may work for some kids and not for others. What about your boy? What do you think?He has a good imagination. sometimes he talks oneself that he really likes music and dancing. He has a lot of energy. Sometimes it’s e xhausting to be around him.Iguess if I were you, I just give him a lot of choices and see what he is interested taking in. and he needs a place where he can use all that energy.Yes, that’s what my husband wants to do. I just get nervous because all his friends are taking classes.I don’t him to fall behind.Idon’t know what to say. Maybe you do some researches and what others advis e. I’m sure you are not the only one facing this problem.At least your husband is taking an interest.If I ever get married, I hope my husband will be as involved as yours. But he has to help you with thisand just complaint.Yes, that’s what we are fighting about. I can’t be expected to do this on my own. You have to do this together.Good luck. And wish me luck in finding a husband, ok.Unit 3-2 Reading Wi-Fi诞生和人工智能Hedy Lamarr a Hollywood starand mother of Wi-FiHedy Lamarr was born Hedwig Eva Naria Kiesler in 1914 in Vienna, Austria. By the time she was a teenager, she had decided to drop out of school and seek fame as an actress. She first appeared in a German film in 1930. She was attractive and talented enough to be in three more films in 1931, but it was her controversial film “Ecstasy”(入迷) that brought her worldwide fame as an actress.In 1937 she fled from her country and secretly moved to Hollywood, where she reinvented herself. She changed her name to Hedy Lamarr, with the nick name” the most beautiful woman in films”. However, Lamarr defied(挑战) the leading-lady stereotype by also pursuing an interest in mathematics and engineering. She soon took up inventing. Her earliest inventions included an improved traffic stoplight and a tablet that would dissolve in water to create a carbonated drink(碳酸饮料).With the ongoing world war, Lamarr was inspired to contribute the war effort. She designed a radio guidance system for torpedoes(鱼雷). With the help of composer(作曲家) George Antheil, whom she met in 1940, she discovered a way to break up signals and transmit them over different frequencies. Using a method similar to the way player piano work, they designed a frequency-hopping system(跳频系统) that would continually change the radio signals sent to a torpedo. While others, including Nikola Tesla, had explored similar ideas of frequency hopping, Lamarr and Antheil obtained a patent for their invention in 1942 for what would become known as spread-spectrum(扩频) technology.Although the US Navy did not adopt the technology during the war, it was used during the Cuban Missile Crisis in 1962. For decades Lamarr’s technology remained behind the scenes, but ultimately it led to the creation of today’s spread-spectrum communication technology, such as Wi-Fi networks, mobile phones, GPS and Bluetooth technologies.Lamarr and Antheil eventually received several awards for their lifetime creative achievements that contributed so much to society. They were inducted(就任;授予) into the national investors Hall of Fame in 2014, after her death in 2000.The challenge of AIThe internet and smartphones have changed the world and how we relate to each other. Instead of meeting in person, we increasingly interface through handheld devices. In a sense, real people are being removed, replaced by technology and virtual friends. Some people even say that they prefer to confidein(信任) their virtual friends rather than their real friends!AI, or artificial intelligence, is another technology that is highly disruptive(破坏的). With AI, smartphone are other devices will have even more capabilities. They will be able to converse with us and tell us jokes. They may even become personal tutors. They will know what kind of problems we have, our preferences, and any content we want to learn or practice, they will be able to adapt to our needs and be available at any time. And all this will be at less cost than using a human.In fact, the substitution(替换) of AIs for human labor has the potential to transform our world. Experts warn that smart machines may cause widespread unemployment. Many works will become redundant(多余的), replaced by machines that can perform cognitive tasks better than people. An even greater danger is that they will develop personalities and become more interesting than people.Work us already underway(起步的) to produce AI companions for lonely people.Are these development something to worry about or something to welcome? How are they different than developments in the past, such as the industrial revolution? Cars replaced horses; machines and industrial robots replaced factory workers.Since the shift to AI is inevitable, the challenge for policy makers will be to help existing workers acquire new skills. Future generations must be prepared for a workplace populated by AIs that will continue to develop and take on new tasks. Are we up to the task?Unit 3-3 listening斯坦福监狱实验In 1971, psychologist created one of the most important experiment in psychology. The experiment known as the Stanford prison experiment, look at the impact of situation in human behavior. The researchers, led by Philip Zimbardo, wanted to know how situations could affect how people behave. In participle, we wanted to know if good people would change their personalities and lose their values. In the experiment, participants were divided into 2 groups. One group became prison guards and the other group became prison inmates. The experiment was set up in Stanford university’s psychology building. A group of 24 students was chosen to play the roles, 12 guards and 12 prisoners. The participants came from a large group of volunteers who wanted to participate in psychology experiment. Those who were chosen had no criminal background and had no significant medical or psychological problems. They agreed to participate in the experiment for 1 to 2 weeks’ period. The prisoners had to remain in prison 24 hours a day during the experiment. Guards are * into 3 and were assigned to work in 8-hours shrifts. Unlike the prisoners, they were free to return their homes between shrifts. Hidden cameras and microphones were used to observe the prisoners and guards. The simulated(冒充的) prison included 3 small prison cell, 6 feet by 9 feet. Each cell had 3 small beds and held 3 prisoners. There was a closet that served as a solitary confinement room(禁闭室). This was used to isolate prisoners who needed to be punished for bad behavior. Guards were instructed not to physically harm the prisoners by any way. prisoners were to be addressed by assigned numbers and never by name. to prevent eye contact with the prisoners, guards wore mirror sunglasses. This was done to dehumanize the relation between guards and prisoners. Though the experiment was designed to last for 14 days, it had to stop after just 6th days. It had to stop because what was happening to the participants. The interactions between the prisoners and guards had become hostile and degrading(有辱人格的). The guards had become aggressive and brutal and the prisoners were passive and depressed. As a result, five of prisoners had to be released early because of the severe negative emotions. Even the researchers were affected and they began to overlook what was happening. Instead of halting the experiment, they led it continue. They themselves, had become dehumanized by the situation he had designed. Finally, they realized the experiment had to be stopped.What the experiment demonstrated is the powerful effect that situation can have on human behavior. Given a position of power, human can begin to behave differently than they normally were. They can become to behave in an aggressive manner while those with no power can became passive and depressed. In other words, the experiment shows that situation can cause abuse of behavior.There are some important criticism s of this experiment. One criticism was that it is an example of unethical research. It went on longer than it should have. It is also unrepresentative since the participants were mostly white, middle-class, males. Despite the criticism, the experiment remains an important study of human behavior. Recent example of the Stanford effect may include the treatment of prisoners of war by American soldiers in the Iraq War. Other possible examples including boiling in school and gun behavior. According to the head researcher, *, it helps to explain how ordinary people sometimes turn bullying evil. If situation do influence people behavior, then managing situations can be a way of controlling people.The prisoners had to remain in prison for the duration of the experiment.Unit 3-3 dialogue跳槽和忠诚Hi, what’s so urgent. When you message me, you seemed really upset.Yes, i was. I was confused and I still am. I need your advice. You’ve known me for a long time. You are my best friend. So what did it?I’ve been offered another job.Oh, that’s usually a nice thing. So what’s the problem?The problem is that they are as stronger as competitors.Oh, you mean Beta Crop.Right, there may be a great offer. More than double than my present salary.Ah, i see. So the dilemma you’re facing is whether to take it or not.Yes, that’s it exactly. It will be a betrayal of everyone I’ve been worked with for more than 10 years. It makes me sick to even think about it. But I’m really tempted. It’s a lot of money. Look, I’ve known you since our student days. If you took that job, you would be betraying yourself. Yes, i know that. I’m with they hadn’t made me such an offer.So why are you asking for advice? If i were to said it’s OK to take the job, will that give an excuse to take it? You otherwise have to live with yourself.Honestly, what would you do?If i were in your situation, i would probably feel the same way. And to be honest, i hope i would be able to stay true to myself. I suppose if my family were very poor and in trouble, I’d be tempted. But even then, to betray my friends and colleagues, who would I be. It’s a real test of character. Yes, those are my thoughts. And I’m not sure what my wife will think.Look, i know your wife. I think she will be proud of you if you do the right thing.Yes, she probably will. And in the end, I’m not sure i can treat the *. they are a branch of cutthroats. They have no a*.So i think the answer is clear. And one more thing, i hope you can do the right thing even for me. We need the people to stand up and do the right thing. If you were to betray yourself, it would discourage everyone who knows you. You have a lot of influence and people look up to you. I don’t want to lose faith in humanity.Thanks. That’s what i thought you would say.I would be disappointed if you thought i say anything different.I will do the right thing whatever the consequences. I know there will be people who will think i beinga fool for turning it down.Yes, but there are the ones who matter.Cheers! To you and saving the world. Ha Ha...Unit 3-3 Reading电影&数字科技Whatever happened to characterMedia and technologies are reprogramming the human brain, changing how we think and live in significant ways. Nobody really knows how this will affect the future, and few seems to care. The tendency is to let it happen and go with the flow, despite warnings from some that all is not well. Nobody can stop progress. Still, it’s fun to reflect on changes to see what might be lost.Looking back to classic movies and comparing them with what we have today, we see many similarities. However, there are major differences. In particular, classic movies succeeded with few if any special effects. The camera focus more on faces and expressions, like in the movie Casablanca. Violent actions were seldom shown in gruesome(可怕的) detail but were inferred(推断) from the situation. Storylines focus on character and personal; dilemmas. Much was left to imagination. And of course, sex was hinted at(暗示) , but never shown, except in seedy(破旧的) theaters.Some of the best movies too place in a single location, such as on a lifeboat or in a jury room. Would such movies draw an audience today? Those movies depended on writers who could build drama into the interactions between characters who had psychology. It also required audiences to have a similar interest, who could empathize and be moved. Do those audiences exist today?Flash forward to the present. So many movies are filled with fast-moving special effects, explicit violence, and lots of sex. We have become voyeurs(窥淫癖者), addicted to getting thrills(兴奋感) through the experiences of others. Subtle emotions? Psychological dilemmas? Or just plain escape! Of course, there have always been escape movies - Bollywood movies with stars dancing in the streets. It’s just the balance which has shifted.Classical music and jazz players for more than a few minutes. People concentrated and took time to enjoy and savor(品味) it. But now, immersed in media, there is no time. Experiences are quick and shallow, measured by the number of likes. We flee into the noise, perhaps to escape from ourselves. What do you think? Or has it always been this way?Digital intelligenceThe impact of technology is widespread and accelerating. Experts predict that 90% of the world’s population will connect to the internet within 10 years or less. Evolving technology has become an unstoppable force. Reshaping our societies, ignoring national borders, and interconnecting economics. There doesn’t seem to be any way to control it. However, one fact is certain: our kids are at the center of it. Today’s children are born into a digital world. They use technologies and media from the time they begin to walk. Sometimes they have difficulty distinguishing between the virtual and the real worlds. In fact, children spend more time immersed in technology than they do with people, including their parents. It is estimated that they spend an average of hours a day in front of some sort of digital device.With the ever increasing amount and flow of information, digital proficiency(精通) may be the next survival skill. Therefore, it is essential that children learn how to develop that skill without losing themselves in the process. Guiding them is a challenge we need to face.First, we need to realize that with so much exposure to content, there are both opportunities and dangers. What and when is something appropriate for children, and at what age? Who decides? Media。
