A brief introduction to boosting

提升自信的技巧ted演讲稿英文回答：Introduction.Confidence is a crucial aspect of personal and professional success. It empowers us to take risks, pursue our goals, and navigate life's challenges with greater ease and resilience. In this talk, we will explore proven techniques to boost our self-confidence and unlock our full potential.Embrace Challenges and Learn from Failure.One of the most effective ways to build confidence is to embrace challenges and learn from our failures. When we step outside our comfort zones and attempt tasks that push our limits, we inevitably encounter setbacks. However, itis our response to these setbacks that truly matters. Instead of giving up or dwelling on our mistakes, we shouldview them as opportunities for growth and learning. By analyzing why we failed and identifying areas for improvement, we can emerge from each experience stronger and more confident in our abilities.Practice Positive Self-Talk.The way we talk to ourselves has a profound impact on our self-confidence. If we engage in negative self-talk, constantly criticizing and berating ourselves, it can undermine our sense of self-worth and hinder our progress. To counteract this, we must make a conscious effort to practice positive self-talk. This means replacing self-criticism with positive affirmations and focusing on our strengths and accomplishments. By doing so, we can gradually rewire our brains to see ourselves in a more positive light, which in turn boosts our confidence.Surround Yourself with Positive People.The people we spend time with have a significant influence on our self-confidence. If we surround ourselveswith negative or unsupportive individuals, it can drag us down and make it harder to maintain a positive self-image. Instead, we should seek out positive and supportive people who believe in us and encourage us to reach our full potential. Their positive energy and belief in ourabilities can help us to see ourselves in a more positive light and bolster our self-confidence.Set Realistic Goals and Celebrate Successes.Setting realistic goals is essential for building confidence. If we set our sights too high and fail to achieve our objectives, it can damage our self-confidence. Instead, we should break down large goals into smaller, more manageable steps. By achieving these smaller goals one by one, we can gradually build a sense of accomplishment and momentum, which in turn boosts our confidence. Additionally, it is important to recognize and celebrate our successes, no matter how small. Each accomplishment, no matter how insignificant it may seem, is a testament to our efforts and a reason to be proud of ourselves.Take Care of Your Physical and Mental Health.Our physical and mental health also play a vital rolein our self-confidence. When we feel good about ourselves both physically and mentally, we are more likely to have a positive self-image and feel confident in our abilities. To enhance our physical well-being, we should engage in regular exercise, eat a healthy diet, and get enough sleep. To improve our mental health, we can practice mindfulness techniques such as meditation or yoga, engage in activities that bring us joy, and seek professional help if needed.Conclusion.Building self-confidence is a journey that requires time and effort. By embracing challenges, practicing positive self-talk, surrounding ourselves with positive people, setting realistic goals, celebrating successes, and taking care of our physical and mental health, we can gradually boost our self-confidence and unlock our true potential. Remember, self-confidence is not a destination but an ongoing process of growth and learning. As wecontinue to challenge ourselves, learn from our experiences, and surround ourselves with positive influences, we can cultivate a lasting sense of self-confidence that will empower us to achieve our goals and live a more fulfilling life.中文回答：引言。

Boosting Self-Confidence: Strategies and InsightsIn today's fast-paced world, self-confidence is a vital asset that can help individuals navigate through challenges and achieve their goals. However, building and maintaining confidence is not always an easy task. Here are some practical strategies and insights that can assist you in enhancing your self-confidence.1.Acknowledge Your Strengths: The first step in building self-confidence is to recognizeand acknowledge your strengths. This means identifying the skills, talents, and abilities that you possess. Make a list of your strengths and refer to it regularly. Reminding yourself of your positive attributes can help you see yourself in a more favorable light.2.Set Achievable Goals: Setting realistic and achievable goals is crucial for boosting self-confidence. When you set goals that are too lofty or unattainable, it can lead to feelings of failure and disappointment. Instead, set small, incremental goals that you can achieve with consistent effort. As you reach each milestone, your sense of accomplishment will grow, and your confidence will increase.3.Embrace Challenges: Challenges are an inevitable part of life, but they can also beopportunities for growth and development. When faced with a challenge, don't shy away from it. Embrace the opportunity to learn and grow. Remember that every challenge you overcome will strengthen your resilience and increase your confidence.4.Practice Positive Self-Talk: Positive self-talk is a powerful tool for building self-confidence. Replace negative thoughts and self-criticisms with positive affirmations and encouraging words. Speak to yourself in a kind and encouraging manner, focusing on your strengths and achievements. This will help you develop a more optimistic mindset and boost your confidence.5.Seek Feedback and Learn from Mistakes: Feedback and criticism can be valuable sourcesof insight and growth. When you receive feedback, take it as an opportunity to learn and improve. Don't be afraid to make mistakes; instead, view them as learning experiences.By reflecting on your mistakes and making corrections, you can develop a stronger sense of self-awareness and self-confidence.6.Maintain a Positive Body Image: Body image can have a significant impact on self-confidence. Focus on loving and accepting your body as it is, rather than comparing yourself to others or striving for unrealistic standards. Practice self-care and self-compassion, and remember that your value is not defined by your appearance.7.Surround Yourself with Positive People: The people you surround yourself with can havea profound influence on your self-confidence. Surround yourself with positive,supportive individuals who believe in you and encourage you to pursue your goals. Avoid negative influences that may undermine your confidence and self-esteem.In conclusion, building self-confidence is a gradual process that requires consistent effort and practice. By acknowledging your strengths, setting achievable goals, embracing challenges, practicing positive self-talk, seeking feedback, maintaining a positive body image, and surrounding yourself with positive people, you can gradually increase your sense of self-worth and confidence. Remember, self-confidence is a journey, not a destination, and it is essential to continue nurturing and developing it throughout your life.。

关于提高学习效率的英语作文体育锻炼等方面全文共3篇示例，供读者参考篇1Striking a Balance: The Importance of Physical Activity for Academic SuccessAs a diligent student, I can't count the number of times I've pushed myself to the brink, burning the midnight oil to cram for exams or meet deadlines. The pressure to excel academically can be intense, leading many of us to neglect our physical well-being in pursuit of academic goals. However, through personal experience and extensive research, I've come to realize that physical activity is not just a luxury – it's a vital component of a well-rounded and successful academic life.In the early days of my academic journey, I bought into the misconception that time spent exercising was time better invested in studying. I would spend hours upon hours hunched over my books, fueling my body with an unhealthy diet of caffeine and junk food. While this approach yielded short-term results, it eventually took a toll on my overall health andproductivity. I found myself struggling to concentrate, feeling lethargic, and prone to bouts of stress and anxiety.It wasn't until I hit a breaking point – a particularly grueling exam season that left me physically and mentally drained – that I realized something needed to change. On the advice of a mentor, I reluctantly incorporated regular exercise into my routine, initially viewing it as a necessary evil. Little did I know that this simple lifestyle adjustment would profoundly impact my academic performance.The first noticeable change was an improvement in my energy levels. After a few weeks of consistent physical activity, I found myself feeling more awake and alert during study sessions. The endorphins released during exercise not only boosted my mood but also enhanced my ability to focus and retain information. Gone were the days of nodding off over my textbooks or struggling to stay motivated.Moreover, exercise proved to be an effectivestress-management tool. As students, we often find ourselves grappling with deadlines, test anxiety, and the pressure to excel. Physical activity provided a healthy outlet for releasing pent-up tension and clearing my mind. After a vigorous workout, I wouldreturn to my studies with a renewed sense of calm and clarity, better equipped to tackle complex problems and think critically.Beyond the mental benefits, regular exercise also improved my overall physical health. By maintaining a balanced diet and incorporating cardiovascular and strength training into my routine, I experienced improved sleep quality, increased energy levels, and a stronger immune system. Fewer sick days meant more time dedicated to my studies, and better sleep translated to enhanced focus and retention during class and study sessions.But the advantages of physical activity extend beyond individual benefits. Engaging in team sports or group fitness classes fostered a sense of community and social support, which is crucial for maintaining a healthy work-life balance. Through these activities, I formed meaningful connections with peers who shared similar goals and challenges, creating a support system that helped me navigate the ups and downs of academic life.It's important to note that incorporating physical activity into a busy academic schedule requires careful time management and prioritization. At first, it may seem daunting to carve out time for exercise amidst the demands of coursework, extracurricular activities, and other commitments. However, withproper planning and discipline, it becomes a seamless part of the routine.One effective strategy is to view exercise not as a separate task, but as an integral part of the learning process. Short bouts of physical activity, such as taking a brisk walk or engaging in a brief yoga session, can serve as rejuvenating breaks during extended study periods. These intermissions not only provide a mental reset but also improve blood flow and oxygen supply to the brain, enhancing cognitive function.Additionally, I've found that scheduling exercise sessions like any other academic commitment – blocking off time in my calendar and treating them with the same level of importance –has been instrumental in developing a consistent routine. By making physical activity a non-negotiable part of my day, I've been able to reap its benefits without compromising my academic obligations.Of course, finding the right type of physical activity is crucial. Not everyone enjoys the same exercises, and it's important to explore various options until you find something that aligns with your interests and fitness level. For me, a combination of weight training, cardio, and yoga has proven to be an effective andenjoyable regimen, but others may prefer team sports, dance classes, or outdoor activities like hiking or cycling.It's also worth noting that physical activity doesn't have to be limited to traditional forms of exercise. Simple lifestyle changes, such as taking the stairs instead of the elevator or walking to class instead of driving, can accumulate and contribute to overall physical well-being.In conclusion, the role of physical activity in academic success cannot be overstated. By incorporating regular exercise into my routine, I've experienced improved mental clarity, enhanced focus and retention, better stress management, increased energy levels, and a stronger sense of community and social support. While juggling academic demands and physical activity can be challenging, proper time management and prioritization make it achievable.As students, we often prioritize our intellectual growth at the expense of our physical well-being. However, by striking a balance and embracing the symbiotic relationship between mind and body, we can unlock our full potential and pave the way for long-term academic and personal success. So, lace up those sneakers, grab a friend, and let's get moving – our academic journeys will be all the richer for it.篇2Maximizing Study Efficiency: The Importance of Exercise and Other StrategiesAs a student, I'm constantly striving to find the perfect balance between my academic pursuits and maintaining a healthy lifestyle. Over the years, I've come to realize that the key to achieving optimal study efficiency lies not only in diligent work habits but also in incorporating various strategies that support both physical and mental well-being. In this essay, I will explore the multifaceted benefits of exercise and other practical techniques that have significantly enhanced my learning experience.The Transformative Power of Exercise:Exercise has been a game-changer in my academic journey. Initially, I was skeptical about the notion of physical activity contributing to intellectual performance. However, after incorporating regular exercise into my routine, I witnessed a remarkable improvement in my ability to concentrate, retain information, and tackle complex concepts with greater clarity.From a physiological perspective, exercise increases blood flow and oxygen supply to the brain, promoting the growth ofnew neural connections and enhancing cognitive function. This heightened brain activity translates into improved focus, memory retention, and overall mental agility – invaluable assets for any student navigating through dense course materials and rigorous assignments.Moreover, exercise serves as a potent stress-reliever, counteracting the detrimental effects of anxiety and fatigue on academic performance. Through the release of endorphins, exercise not only elevates my mood but also helps me maintain a positive and resilient mindset, crucial for overcoming academic challenges and setbacks.Beyond the tangible cognitive benefits, exercise has instilled in me a sense of discipline and time management skills that extend far beyond the realm of physical fitness. By committing to a consistent exercise routine, I have developed the ability to prioritize tasks, allocate time efficiently, and cultivate perseverance – all of which are invaluable attributes for academic success.Optimizing Study Environments:While exercise plays a pivotal role in boosting my study efficiency, I have also learned the importance of curating conducive study environments. Throughout my academicjourney, I have experimented with various settings and discovered that certain environments are more conducive to productive learning than others.For instance, I have found that studying in quiet, well-lit spaces with minimal distractions allows me to maintain focus and concentration for extended periods. Conversely, studying in noisy or cluttered environments often leads to diminished attention span and increased fatigue.To create an optimal study environment, I have implemented strategies such as designating a dedicated study area, minimizing visual and auditory distractions, and incorporating ergonomic furniture to promote proper posture and prevent physical discomfort during prolonged study sessions.Effective Time Management and Goal-Setting:Time management and goal-setting have been instrumental in maximizing my study efficiency. As a student juggling multiple courses, extracurricular activities, and personal commitments, it is essential to prioritize tasks effectively and allocate time judiciously.One approach that has proven incredibly useful is the implementation of daily and weekly schedules. By breaking down larger assignments into manageable tasks and allocating specific time blocks for each task, I have been able to maintain a consistent workflow and avoid procrastination.Additionally, setting realistic篇3Enhancing Study Efficiency: The Power of Exercise and Other StrategiesAs a student, the constant pursuit of academic excellence can often feel like an uphill battle. With a never-ending stream of assignments, projects, and exams, it's easy to become overwhelmed and lose focus, ultimately hampering our learning abilities. However, through implementing various strategies, including regular exercise, we can significantly enhance our study efficiency and unlock our full potential.The Benefits of Exercise on Academic PerformanceExercise has long been touted as a panacea for physical health, but its impact on cognitive function and academic performance is often overlooked. Numerous studies have demonstrated that regular physical activity can improve memory,concentration, and overall brain function, all of which are crucial for effective learning.When we exercise, our bodies release a surge of endorphins, neurotransmitters that promote feelings of euphoria andwell-being. This positive emotional state can reduce stress and anxiety, two major obstacles to successful studying. Additionally, exercise increases blood flow to the brain, supplying it with vital oxygen and nutrients necessary for optimal cognitive function.Personally, I've found that incorporating even a short workout routine into my daily schedule can significantly boost my energy levels and mental clarity. Whether it's a brisk walk, a yoga session, or a high-intensity interval training (HIIT) workout, the endorphin rush and improved blood flow leave me feeling invigorated and ready to tackle even the most challenging academic tasks.Time Management and PrioritizationEffective time management is another critical component of study efficiency. As students, we often juggle multiple commitments, including classes, extracurricular activities, and social obligations. Without proper time management, it's easy to become overwhelmed and lose focus, ultimately hindering our academic progress.One strategy that has proven invaluable for me is creating a comprehensive study schedule. By allocating dedicated time slots for each subject or task, I can ensure that I'm devoting sufficient attention to each area without neglecting other responsibilities. This approach not only promotes better time utilization but also helps reduce stress and anxiety, as I can tackle each task methodically without feeling overwhelmed.Additionally, prioritization is key. By identifying and addressing the most pressing assignments or exams first, I can concentrate my efforts on the most crucial tasks, minimizing the risk of falling behind or missing deadlines.Creating an Optimal Study EnvironmentThe environment in which we study can have a profound impact on our ability to learn and retain information. A。

2020年9月英语六级真题及参考答案【完整版】四六级试卷采用多题多卷形式，大家核对答案时，请找具体选项内容，忽略套数。

无忧考网搜集整理了各个版本(有文字也有图片)，仅供大家参考。

【网络综合版】听力：Section ALong Conversation OneM: You are a professor of Physics at the University of Oxford. You are a senior advisor at the European Organization for Nuclear Research. You also seem to tour the global tirelessly, giving talks. And in addition, you have your own weekly TV show On Science. Where do you get the energy?W: Oh, well. 【Q1】I just love what I do. I am extremely fortunate to have this life, doing what I love doing.M: Professor, what exactly is your goal? Why do you do all of these?W: well, as you said, I do have different things going on. But these I think can be divided into 【Q2】two groups: the education of science, and the further understanding of science.M: Don't these two things get in the way of each other? What I mean is, doesn't giving lectures take time away from the lab?W: Not really, no. I love teaching, and I don’t mind spending more time doing that now than in the past. Also, what I will say is, that 【Q3】teaching a subject helps me comprehend it better myself. I find that it furthers my own knowledge when I have to explain something clearly, when I have to aid others understanding it, and when I have to answer questions about it. Teaching at a high level can be very stimulating for anyone, no matter how much expertise they may already have in the field they are instructing.M: Are there any scientific breakthroughs that you see on the near horizon? A significant discovery or invention we can expect soon.W: 【Q4】The world is always conducting science. And there're constantly new things being discovered. In fact, right now, we have too much data sitting in computers.For example, we have thousands of photos of planet Mars taken by telescopes that nobody has ever seen. We have them, yet nobody has had time to look at them with their own eyes, let alone analyze them.Q1: Why does the woman say she can be so energetic?Q2: What has the woman been engaged in?Q3: What does the woman say about the benefit teaching brings to her?Q4: How does the woman say new scientific breakthroughs can be made possible?Section AConversation 2M: Do you think dreams 【Q5】have special meanings?W: No. I don't think they do.M: I don't either, but some people do. I would say people who believe that dreams have special meanings are superstitious, especially nowadays. In the past, during the times of ancient Egypt, Greece or China, people used to believe that dreams could foresee the future. But today, with all the scientific knowledge that we have, I think it's much harder to believe in these sorts of things.W: My grandmother is superstitious, and she thinks dreams can predict the future. Once, 【Q6】she dreamed that the flight she was due to take the following day crashed.Can you guess what she did? She didn't take that flight. She didn't even bother to go to the airport the following day. Instead, she took the same flight but a week later. And everything was fine of course. No plane ever crashed.M: How funny! Did you know that flying is actually safer than any other mode of transport? It's been statistically proven. People can be so irrational sometimes.W: Yes, absolutely. But, even if we think they are ridiculous, 【Q7】emotions can be just as powerful as rational thinking.M: Exactly. People do all sorts of crazy things because of their irrational feelings. But in fact, some psychologists believe that our dreams are the result of our emotions and memories from that day. I think it was Sigmund Freud who said that children's dreams were usually simple representations of their wishes, thingsthey wished would happen. 【Q8】But in adults', dreams are much more complicated reflections of their more sophisticated sentiments.W: Isn't it interesting how psychologists try to understand using the scientific method something as bazaar as dreams? Psychology is like the rational study of irrational feelings.Q5: What do both speakers think of dreams?Q6: Why didn't the woman's grandmother take her scheduled flight?Q7: What does the woman say about people's emotions?Q8: What did psychologist Sigmund Freud say about adults' dreams?Section BPassage 1While some scientists explore the surface of the Antarctic, others are learning more about a giant body of water -- four kilometers beneath the ice pack. Scientists first discovered Lake Vostok in the 1970s by using radio waves that penetrate the ice. Since then, they have used sound waves and even satellites to map this massive body of water. How does the water in Lake Vostok remained liquid beneath an ice sheet? “The thick glacier above acts like insulating blanket and keeps the water from freezing,” said Martin Siegert, a glaciologist from the university of Wales. In addition, geothermal heat from the deep within the earth may warm the hidden lake.The scientists suspect that microorganisms may be living in Lake Vostok, closed or more than two million years. Anything found that off from the outside world f s on the surface of the earth, said Siegert. Scientists ’will be totally alien to what are trying to find a way to drill into the ice and draw water samples without causing ht be the solution. If all goes as planned, a contamination. Again, robots mig shift robot will melt through the surface ice. When it reaches the lake, it -drill will release another robot that can swim in the lake, take pictures and look for ries will shed light on life in outer signs of life. The scientists hope that discove up -space, which might exist in similar dark and airless conditions. Recently closed s moon, Europa, shows signs of water beneath the icy surface. ’pictures of Jupiter ropa to search for life there, Once tested the Antarctic, robots could be set to Eu too.Q9: What did the scientists first use to discover Lake Vostok in the 1970s? Q10: What did scientists think about Lake Vostok?Q11: What do the scientists hope their discoveries will do?Section BPassage 2The idea to study the American Indian tribe – Tarahumaras, came to James Copeland in 1984 when 【Q12】he discovered that very little research had been done on their language. He contacted the tribe member through a social worker who workedwith the tribes in Mexico. At first, the tribe member named Gonzalez was very reluctant to cooperate. He told Copeland that no amount of money could buy his language. But after Copeland explained to him what he intended to do with his research and how it would benefit the Tarahumaras, Gonzalez agreed to help. 【Q13】He took Copeland to his village and served as an intermediary. Copeland says, thanks to him, the Tarahumaras understood what their mission was and started trusting us. 【Q14】Entering the world of Tarahumaras has been a laborious project for Copeland.To reach their homeland, he must strive two and half days from Huston Taxes. He loads up his vehicle with goods that the tribe’s men can’t easily get and gives the goods to them as a gesture of friendship. The Tarahumaras, who don’t believe any humiliating wealth, take the food and share among themselves. For Copeland, the experience has not only been academically satisfying but also has enriched his life in several ways. 【Q15】“I see people rejecting technology and living a very hard, traditional life, which offers me another notion about the meaning of progress in the western tradition,” he says, “I experienced the simplicity of living in nature that I would otherwise only be able to read about.I see a lot of beauty and their sense of sharing and concern for each other.”Q12: Why did James Copeland want to study the American Indian tribe -- Tarahumaras?Q13: How did Gonzalez help James Copeland?Q14: What does the speaker say about James Copeland’s trip to the Tarahumaras village?Q15: What impresses James Copeland about the Tarahumaras tribe?Section CRecording 1What is a radical? It seems today that people are terrified of the term,minority, who are mostly wealthy white males in western society.Feminism is a perfect example of this phenomenon. The women's movement has been plagued by stereotypes, misrepresentations by the media, and accusations of man-hating and radicalism. When the basic foundation of feminism is simply that women deserve equal rights in all facets of life. When faced with the threat of being labelled radical, women back down from their worthy calls and consequently, participate in their own oppression.It has gotten to the point that many women are afraid to call themselves feminists because of a stigma attached to the word. If people refused to be controlled, and intimidated by stigmas, the stigmas lose all their power, without fear on which they feed, such stigmas can only die.To me, 【Q17】a radical is simply someone who rebels against the norm when advocates a change in the existing state of affairs. On close inspection, it becomes clear that the norm is constantly involving, and therefore, is not a constant entity. So why then, is deviation from the present situation such a threat, when the state of affairs itself is unstable and subject to relentless transformation?It all goes back to maintaining the power of those who have it and preventing the right of those who don't. In fact, when we look at the word "radical" in a historical context, nearly every figure we now hold up as a hero was considered a radical in his or her time. Radicals are people who affect change. They are the people about whom history is written. Abolitionists were radicals, civil rights activists were radicals, 【Q18】 even the founders of our country in their fight to win independence from England were radicals. Their presence in history has changed the way our society functions, mainly by shifting the balance of power that previously existed. Of course, there are some radicals who've made a negative impact on humanity, 【Q18】 but undeniably, there would simply be no progress without radicals. That been said, next time someone calls me a radical, I would accept that label with pride.Q16: What usually happens when people are accused of being radical?Q17: What is the speaker's definition of a radical?Q18: What does the speaker think of most radicals in the American history?Recording 2We are very susceptible to the influence of the people around us. For instance, you may have known somebody who has gone overseas for a year or so and has returned with an accent perhaps. We become part of our immediate environment. None of us are immune to the influences of our own world and let us not kid ourselves that we are untouched by the things and people in our life.Fred goes off to his new job at a factory. Fred takes his ten-minute coffee break, but the other workers take half an hour. Fred says, “What’s the matter with you guys?” Two weeks later, Fred is taking twenty-minute breaks. A month later, Fred takes his half hour. Fred is saying “If you can’t be them, join them. Why should I work any harder than the next guy?” The fascinating thing about being human is that generally we are unaware that there are changes taking place in our mentality. It is like returning to the city smog after some weeks in the fresh air. Only then do we realize that we’ve become accustomed to the nasty smells. Mix with critical people and we learn to criticize. Mix with happy people, and we learn about happiness. What this means is that we need to decide what we want from life and then choose our company accordingly. You may well say, "That is going to take some effort. It may not be comfortable. I may offend some of my present company." Right, but it is your life. Fred may say, "I’m always broke, frequently depressed. I’m going nowhereand I never do anything exciting." Then we discover that Fred’s best friends are always broke, frequently depressed, going nowhere and wishing that life was more exciting. This is not coincidence, nor is it our business to stand in judgement of Fred? However, if Fred ever wants to improve his quality of life, the first thing he'll need to do is recognize what has been going on all these years.It’s no surprise that doctors as a profession suffer a lot of ill health, because they spend their life around sick people. Psychiatrists have a higher incidence of suicide in their profession for related reasons. Traditionally, nine out of ten children whose parents smoke, smoke themselves. Obesity is in part an environmental problem. Successful people have successful friends, and so the story goes on.Q19 What does the speaker say about us as human beings?Q20 What does the speaker say Fred should do first to improve his quality of life?Q21 What does the speaker say about the psychiatrists?Section CLecture 3Virtually every American can recognize a dollar bill at a mere glance. Many can identify it by its sound or texture. But 【Q22】few people indeed can accurately describe the world's most powerful, important currency.The American dollar bill is colored with black ink on one side and green on the other;【Q23】 the exact composition of the paper and ink is a closely guarded government secret. Despite its weighty importance, the dollar bill actually weighs little. It requires nearly 500 bills to tip the scales at a pound. Not only is the dollar bill lightweight, but it also has a brief life span. Few dollar bills survive longer than 18 months.The word "dollar" is taken from the German word "taler," the name for the world's most important currency in the 16th century. The taler was a silver coin first minted in 1518 under the reign of Charles V, Emperor of Germany.The concept of paper money is a relatively recent innovation in the history of American currency. When the Constitution was signed, people had little regard for paper money because of its steadily decreasing value during the colonial era.【Q24】Because of this lack of faith, the new American government minted only coins for common currency. Interest-bearing bank notes were issued at the same time, but their purpose was limited to providing money for urgent government crises, such as American involvement in the War of 1812.The first noninterest-bearing paper currency was authorized by Congress in 1862, at the height of the Civil War. At this point, citizens' old fears of devalued paper currency had calmed, and the dollar bill was born. The new green colored paper money quickly earned the nickname "greenback."Today, the American dollar bill is a product of the Federal Reserve and is issued from the twelve Federal Reserve banks around the United States. The government keeps a steady supply of approximately two billion bills in circulation at all times.Controversy continues to surround the true value of the dollar bill.【Q25】American history has seen generations of politicians argue in favor of a gold standard for American currency. However, for the present, the American dollar bill holds the value that is printed on it, and little more. The only other guarantee on the bill is a Federal Reserve pledge of as a confirmation in the form of government securities.Q22: What does the speaker say about the American dollar bill?Q23: What does the speaker say about the exact composition of the American dollar bill?Q24: Why did the new American government mint only coins for common currency?Q25: What have generations of American politicians argued for?参考答案1.A)She can devote all her life to pursing her passion.2.D)Science education and scientific research.3.A)A better understanding of a subject.4.B)By making full use of the existing data.5. B) They have no special meanings.6. C) She dreamed of a plane crash.7. D) They can have an impact as great as rational thinking8. C) They reflect their complicated emotions.9. A) Radio waves.10. B)It may have micro—organisms living in it.11. D)Shed light on possible life in outer space.12. A)He found there had been little research on their anguage.13. D)He acted as an intermediary between Copel and the villagers.14. C)Laborious15. B)Their sense of sharing and caring.16 .A)They tend to be silenced into submission.17. D)One who rebels against the existing social orser.18. C)They served as a driving force for progress.19. B)It is impossible for us to be immune from outside influence.20. D) Recognize the negative impact of his coworkers.21. A) They are quite susceptible to suicide.22. B) Few people can describe it precisely.23. C) It is a well—protected government secret.24. A) People had little faith in paper money.25. C) It is awell—protected government secret.翻译：《水浒传》(Water Margin)是中国文学四大经典小说之一。