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Orchids’ Secret

Orchids (兰花) are some of the most rare and delicate species in all of nature. For hundreds of years orchids have been prized discoveries of collectors and adventurers hoping to find new and diverse kinds of the flower. “Orchid hunters” went looking for the mysterious orchids and brought back new types to sell. However, many of them met with tragedy instead. Dozens of hunters were killed by accidents or diseases or murder. Others became food for horrible creatures.

While the plants have long been valued for their beauty, they may be even more important to science and our understanding of co-evolution. Unlike plants that can self-pollinate (自我授粉), orchids need very specific insects or birds to spread their pollen. The process by which insects, the wind, or birds spread the pollen of different flowers is called pollination. Pollen is a powder produced by plants that contains their genetic material. In order for the plants to reproduce, the pollen must be physically moved to the flower’s stigma (花的柱头), which contains an egg. Now the fertilized egg can become a seed. Birds and insects can pollinate plants by touching many different flowers and spreading the pollen around.

Orchids evolved to attract insects and birds. Because there are many different species of orchid, there are also many different ways the orchids attract their pollinators. Orlean explains that “many species look so much like their favorite insects that an insect mistakes them for its relatives, and when it lands on the flower to visit, pollen sticks to its body. Another orchid imitates the shape of something that a pollinating insect likes to kill... Other species look like the mate of their pollinator, so the bug tries to mate with one orchid and then another… and spreads pollen from flower to flower each hopeless time.”

Other orchids don’t use their shape at all, but rather produce specialized smells to attract specific insects, such as bees, beetles or flies. Some orchids smell like cake, some like chocolate, and some like rotting meat. All these smells may seem weird, but they exist to attract creatures to their pollen and help the orchids survive.

Orchids provide new angles for the research into plant and animal evolution on the earth. The strategies to attract insects and spread their flowers’ pollen go on and on. Each family of orchids has a unique kind of insect or bird that visits their flowers, as well as its own way of attracting them. It has worked, too. Orchid species number more than 25,000 worldwide, which is more kinds of species than any other flower on the planet, and new ones are still being found.

Orchids and the insects that pollinate them are one of the most amazing examples of evolution. By tricking the insects that collect its pollen, the orchid has survived since the time of the dinosaurs.

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Millions of people illegally download movies, music and video games every day, and online piracy is a serious and expensive problem. Recent figures show that 90% of files transferred over file-sharing networks are copyrighted. And it's costing the US economy up to $250 billion a year. At the heart of the matter there's a moral question to consider. Is it fair that someone downloads for free in seconds something that took a team of people months of hard work to create?

What are governments doing about online piracy? Some countries have passed tough new laws. The Spanish government has shut down domestic file-sharing websites and blocked access to overseas-based sites. Also, governments are going after high-profile pirates. Kim Dotcom, the owner of Megaupload.com, was arrested in New Zealand, who has been accused of piracy because many people were using his website to swap copyrighted files.

Are laws and arrests really the best way? Many people aren't so sure. The problem is that films are released at different times around the world. Kim Dotcom says that a teenager in Germany, for example, has to wait six months to see a movie that has already come out in the U.S. So, instead of waiting, they download it illegally. Kim says, ''If everybody had access to content at the same time, you wouldn't have a piracy problem. ''

American company Netflix lets users stream films to their TV. But many complain that Netflix's selection of movies is too small and that there aren't enough new releases. One reason is that studios release films on DVD and then, after a few months, make them available for streaming. But what actually happens is one person buys the DVD, they upload it to a file-sharing site and everyone else downloads it for free.

American law student Srikant believes that if movie studios and record companies want to beat the pirates, they need to make it just as simple and quick to get content legally. ''I think people would pay for content if it's reasonably priced and it's available when they want it. '' he adds.

This is already happening with music. Spotify is a program that lets you stream music to your computer for just €5 per month. And since it was launched in Sweden in 2009, online music piracy in Sweden has dropped by 25%. The key to its success lies in that Spotify has a large range of music; songs are instantly available and the service is reasonably priced.

Easy access isn't the only possible solution. Economist Glenn MacDonald thinks he has the answer. He says record companies should give albums away for free and then make money from tours and merchandising. That's not such a ridiculous idea. The heavy metal group Manowar has made a fortune from their tours, which are full of fans who discovered the band by illegally downloading the music.

Online piracy is a complex and controversial issue. And one thing is for sure: it's not going away anytime soon .

Online piracy----The issue of illegal file sharing

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The development of penicillin(1928-1945)

In 1928,Alexander Fleming was spending several weeks growing bacteria in piles of dishes for his experiment when he noticed a dish didn't look normal with blue mould in .Much to his astonishment, the mould killed the bacteria surrounding it. After discussing the blue mould with mould expert C. J. La Touche who had his office below Fleming's, they determined the mould to be a Penicillin mould. Fleming then called the active antibacterial agent in the mould, penicillin. He continued to run numerous experiments to determine the effect of the mould on other harmful bacteria. Surprisingly, the mould killed large number of them. He found the mould to be nontoxic and contain a powerful antibiotic.

In 1929, Fleming wrote a paper on his findings, which did not get any scientific interest. His penicillin was still in his lab far from an effective medicine because the development of Penicillin as a drug faced two problems. First, it was difficult for him to purify penicillin to work as a medicine. Second, he was not able to produce penicillin in the ample quantities needed to be effective

Fleming was praised for the discovery, but it was Howard Florey, Ernst Chain and their Colleagues at the Sir William Dunn School of Pathology at Oxford University who managed to turn penicillin from a lab curiosity into an effective drug. In 1940,they worked with penicillin. Solving these problems and stepping up its large-scale production

The increasingly obvious value and demand of penicillin in World War II accelerated the process of its mass production, which began in 1944.The wide use of penicillin during World War II saved many lives. Without it, many people would have died due to bacterial infections in even minor wounds.

Fleming discovered penicillin. Florey and Chain made it a usable product with a nickname of “wonder drug”. All three of them were awarded the 1945 Nobel Prize in Physiology or　 Medicine.

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The Cost of Thinking

Despite their many differences, all human beings share several defining characteristics, such as large brains and the ability to walk upright on two legs.

The first unique human characteristic is that humans have extraordinarily large brains compared with other animals. It seems obvious that evolution should select for larger brains. Mammals(哺乳动物) weighing sixty kilograms have an average brain size of 200 cm2. Modern man has a brain averaging 1200-1400 cm2. We are so fond of our high intelligence that we assume that when it comes to brain power, more must be better. Unfortunately, that is not the case.

The fact is that a huge brain is a huge drain—consumption of energy—on the body. It’s not easy to carry around, especially when boxed inside a massive skull(倾骨). It’s even harder to provide energy. In modern man, the brain accounts for about 2-3% of total body weight, but it consumes 25% of the body’s energy when the body is at rest. By comparison, the brains of apes(类人猿) require only 8% of rest-time energy. Early humans paid for their large brains in two ways. Firstly, they spent more time in search of food. Secondly, their muscles grew smaller and weaker. It’s hardly an obvious conclusion that this is a good way to survive. A chimpanzee(黑猩猩) can’t win an argument with a modern man, but it can tear the man apart like a rag doll.

Another unique human characteristic is that we walk upright. Standing up, it’s easier to find food or enemies. In addition, their arms that are unnecessary for moving around are freed for other purposes, like throwing stones or signaling. As a result, humans can perform very complex tasks with their hands.

Yet walking upright has its disadvantage. The bone structure of our ancestors developed for millions of years to support a creature that walked on all fours and has a relatively small head. Adjusting to an upright position was quite a challenge, especially when the bones had to support an extra-large skull. Humankind paid for its broad vision and skillful hands backaches and painful necks.

We assume that a large brain makes huge advantages. It seems obvious that these have made humankind the most powerful animal on earth. But humans enjoyed all of these advantages for a full 2 million years during which they remained weak and marginal creatures. Thus humans who lived a million years ago, despite their big brains and sharp stone tools, lived in constant fear of meat-eating animals.

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China Using Mobile Apps to Follow Spread of Coronavirus

People in China are using apps on mobile phones to follow and perhaps help slow the spread of the new coronavirus, COVID-19. Some of the apps provide the latest information about areas hit by the virus, while others collect data on infected persons.

The Chinese government is working with two of the country’s largest technology companies to keep track of the disease. The two, Alibaba Group and Tencent Holdings, created color-based systems that record the health of individuals and identify carriers of the coronavirus.

In February, Alipay, a payment app operated by Alibaba, released a system that uses colored QR Codes to show the health of people in the city of Hangzhou. A QR code is a sign a smartphone　　 can read with its camera. Once the sign is recognized, the phone takes the user directly to an internet link with information about a subject.

After completing the questionnaire, users receive a mobile phone message. It includes a color-based QR Code that relates to the health situation they described. Users with a red code are told to quarantine themselves for 14 days and continue reporting their condition by using Alibaba’s DingTalk messaging app. Users with a yellow code are told to stay in quarantine for 7 days, while those with a green code can travel freely.

Chinese state media said the Alibaba system would be deployed at train stations, along major roads and other travel checkpoints. They added that the system is also being used in some neighborhoods. People are asked to show QR Codes when entering their apartment buildings. Customers are asked to do the same before entering the local supermarket. Alipay said it was working with the government to expand the system nationwide.

Tencent, which operates China’s popular messaging app WeChat, reported the launch of a similar QR Code-based tracking system. Tencent developed the system with help from China’s National Development and Reform Council, which is currently in use in the southern city of Shenzhen. Officials said they expected it to be deployed to other parts of Guangdong province soon.

Even before the latest systems were announced, many Chinese were already using mapping and travel apps in an effort to avoid areas with coronavirus infections. One of the apps, developed by WeChat, uses official reports to identify places in the cities of Shenzhen and Guangzhou where coronavirus cases have been confirmed.

One user of the apps told Reuters she finds the maps can provide “psychological comfort.” The woman, who did not want her full name reported, said: “You can’t guarantee there won’t be fresh cases, but you can avoid an area that’s already hit.”

The technology website Abacus reported that citizens can request location data from their mobile phone carrier to show they had not been in affected areas. The report said that if requested, China’s state-owned telecommunication companies will send users a message listing all the areas they had visited within the past 14 days.

高三英语任务型阅读困难题查看答案及解析

任务型阅读

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What is eco­fashion? Eco-fashion is about making clothes that take into account the environment, the health of consumers and the working conditions of people in the fashion industry.　 It is a complex phenomenon and the common use of the fashionable terms—‘ecological’ and ‘ethical’. Ecological fashion usually refers to textile (织物) and clothing production processes and the environmental issues surrounding them；ethical fashion generally relates to the working conditions involved in the producing processes.

What are the problems with fashion? A closer look at the fashion industry points out many problems that are common practices in the creation of our fashions from the field to the factory. Firstly，the production of textiles pollutes the environment heavily. Cotton­planting uses pesticides；sheep­farming and wool­cleaning contribute to global warming；synthetics­making (人造纤维生产) brings about waste which does harm to our environment. Secondly，every stage of clothing production has a significant effect on the environment. They all use a great deal of energy，and some also involve chemicals which evidently do harm to the surroundings. In addition to this，there is a lot of waste produced in the process，especially in the form of polluted water. Thirdly，growing consumption levels and our shopping habits further worsen the bad effects. We are now buying clothes in increasing quantities without realizing the scale on which it affects natural environment，and we are also quick to throw away clothes that have been worn only a couple of times.

Then，how to solve the problems? Other industries that design products are ahead of the fashion industry when it comes to choosing sustainable materials, designing for minimum waste, choosing energy efficient manufacturing and creating products for longevity. The fashion industry has been slow to adopt these changes and part of the problem is the very nature of fashion. To a large degree，it is the fashion producers that really have the power and the responsibility to shape our future. There are numerous ways in which these producers can reduce their ecological footprint，from switching to green energy and reducing energy use，through selecting sustainable materials and choosing local suppliers，to recycle and minimize waste. On the other hand，as consumers we can all make contributions by selecting environmentally friendly clothing and reducing clothing consumption.

There is some concern that eco-friendly fashions are just a trend that we will eventually grow tired of but we can make sure that doesn't happen. Now many people are beginning to shop for organic food products because the benefits of eating food free of chemicals are straightforward and immediate. They relate directly to our personal health. In fact, choosing eco­fashion can also contribute to our personal health, though it is mostly done by way of keeping the health of the planet.

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Many of today's young people have a difficult time seeing any moral dimension to their actions. There are a number of reasons why that’s true, but none more important than a failed system of education that avoids teaching children the traditional moral values that bind Americans together as a society and a culture. That failed approach, called ''decision-making'', was introduced in schools 25 years ago. It tells children to decide for themselves what is right and what is wrong. It replaced ''character education'', which didn't ask children to reinvent the moral wheel, but encouraged them to practice habits of courage, justice and self- control.

Decision-making curriculums pose ethical dilemmas to students, leaving them with the impression that all morality is problematic and that all questions of right and wrong are based on people's own ideas. Youngsters are forced to question values and virtues they've never acquired in the first place. The assumption behind this method is that students will arrive at good moral conclusions if they are given the chance. But the actual result is moral confusion.

This kind of confusion further encouraged by values-education programs that are little more than courses in self-worth. These programs are based on the questionable assumption that a child who feels good about himself or herself won't want to do anything wrong. But it is just as reasonable to make an opposite assumption: namely, that a child who always believes in and accepts himself will conclude that he or she can't do anything bad.

It is time to throw ''decision-making'' and ''none-judgementalism'' into the rubbish heap of failed policies, and return to a proved method. Character education provides a much more realistic approach to moral formation. It is built on an understanding that we learn morality not by debating it, but by practicing it.

Children Must Be Taught to Distinguish Right from Wrong

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How to Think Outside the Box with Creativity Exercises

Encouraging creative thinking inspires students to ask questions, try new things and apply ideas to practical situations. Use individual and group based activities to open the door to innovation and build individual confidence. Incorporate creativity activities into everyday subject matter like English, science and art. The result will be increased interest in learning and the opportunity for each student to believe in her power to be creative in a variety of situations. Three creativity exercises are suggested as follows.

Use a mind-mapping exercise to help students overcome mind blocks to creativity.

Joyce Wycoff, author of the book “Mindmapping,” explains that a mind map encourages creativity by stimulating the brain to think in different patterns. Put a concept in the center of a large piece of paper and have your students surround the paper, each holding a marker. Ask them to brainstorm ideas and write them as offshoots (分支) to the concept. Have them add images and draw connections between ideas. You can use this to help them create a project, study for tests or organize a research paper.

Play a game of charades to empower students to use their minds and bodies to help their team win the game.

Select words that apply to a new topic you wish to introduce to the class. For example, if you want to discuss the history of your state, pick words that illustrate historical events your class will study. Divide the class into teams and ask volunteers to act out the words. Have students guess what the words are, and write the words on the board after students guess them correctly so they can see a complete list at the end of the game. Go back and forth between teams until all words have been used. When the game is over, ask the class to guess what the words have in common.

Invigorate (鼓舞) your students and stimulate creative thinking by facilitating a sentence relay race.

The goal of the race is to see which team can compose a sentence on a given subject. Begin by taping large pieces of paper to the wall and line up student teams about 5 feet from the wall. Give the teams one marker and a subject for the sentence. Tell them the object of the race is to build a sentence, one word at a time. The first student in each team will begin the sentence with a word. He will then run the marker to the next teammate and continue the process until each student has added a word to the sentence. The sentence relay will encourage quick thinking and stimulate creativity. Use the race to introduce a social studies concept or to reinforce the plot of a story for English class.

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Humor

If you see humor as an optional form of entertainment, you’re missing some of its biggest benefits: Humor makes average-looking people look cute and uninteresting people seem entertaining. Studies show that a good sense of humor even makes you seem smarter.

Best of all, humor raises your energy, and that can have an effect on everything you do at school, at work, or in your personal life. The increase of energy will even make you more willing to exercise, and that will raise your overall energy even more.

Humor also transports your mind away from your daily troubles. Humor lets you better understand life and sometimes helps you laugh at even the worst of your problems.

In my experience, most people think they have a sense of humor, and to some degree that’s true. But not all senses of humor are created equal. So I thought it would be useful to include some humor tips for everyday life.

You don’t have to be the joke teller in the group in order to show your sense of humor. You can be the one who directs the conversation to fun topics that are ripe for others to add humor. Every party needs a straight person. You’ll appear fun and funny by association.

When it comes to in-person humor, effort counts a lot. When people see you trying to be funny, it frees them to try it themselves. So even if your own efforts at humor fall short, you might be freeing the long kept humor in others. People need permission to be funny in social settings because there’s always a risk that comes with humor. For in-person humor, quality isn’t as important as you might think. Your attitude and effort count a lot.

Some people--and I was one of them--believe that humorous complaints about the little problems of life make humor, and sometimes that is the case. The problem comes when you start doing too much complaint-based humor. One funny observation about problem in your life can be funny, but five is just complaining, no matter how smart you think you are. Funny complaints can wear people out.

Self-deprecating(自嘲式) humor is usually the safest type, but here again you don’t want to overshoot the target. One self-deprecating comment is a generous and even confident form of humor. You have to be at least a bit self-assured to laugh at yourself in front of others. But if you do it too often, you can transform in the eyes of others from a confident joker to a Chihuahua dog.

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The loss of handwriting in our high-tech world saddens me. People of all ages openly admit their handwriting as keyboards replace pen and paper. Increasingly, schoolchildren deal with assignments on computer and struggle to write, having had little practice. I am of the generation that learnt to write with a dip pen in kindergarten and a fountain pen in high school; by the time I reached university, like everyone else. I used a functional ballpoint. Handwriting has filled every aspect of my life since I was first taught to shape letters on the lined pages of my exercise books.

From the age of 12,I kept a handwritten journal, recording my thoughts and feelings regarding both the significant and mundane aspects of my life. Through this daily practice I connected with myself, explored experiences and found a way to interpret and make sense of my relationships. Although I rarely reread my written material, the process of writing has remained with me as a means of processing my feelings and filtering（过滤） my experiences.

Yet today, handwritten letters are as rare as a red panda. Few of us write any longer, even to those to whom we are close, We communicate difficultly when we e-mail or text, both methods characterized by speed and informality. The deep thinking which accompanied a handwritten letter is almost entirely absent. We may be communicating more frequently and with more people, but the depth and quality of our communication has reduced.

Sadly, modern technology tends to be temporary. Few of us keep old e-mails or even print them out, so a sense of history and memory is lost. Archivists（档案管理者）report that more information has been lost in the past decade than in the previous 150 years. It is too easy to press the delete button.

In many other areas of records, material is now in the digital format. Yet saving material in a digital format only is extremely unstable. How it will survive the future remains a problem.

In this digital world of text, e-mails and instant messaging, the perceived value of writing is no longer obvious and the case for retaining the practice of writing needs to be made. Should we save the bumble pen and paper when laptops and mobiles are functional, universal and unstoppable? Should children continue to be taught to write with a pen and paper?

With its passing a good mode of self-expression is being lost. I invite readers to engage with handwriting and become aware of this special skill that has created civilization for centuries.

高三英语任务型阅读中等难度题查看答案及解析