1 . On paper, hydrogen（H2）looks like a dream fuel. Coal, oil, and natural gas produce carbon dioxide, which warms the earth when burned, Hydrogen produces pure water. Hydrogen packs more energy into less space than a battery（but certainly less than petrol）. Also, empty tanks（燃料箱）can be refilled with hydrogen much faster than refilling empty batteries with electricity.
While in practice, things are trickier. Storing a meaningful amount of hydrogen gas requires pressing it several hundred-fold. Changing it into the liquid form is another option, but it should be cooled to-253C. Both processes require a heavy and strong tank. While a 700 bar tank is acceptable for a city bus or a truck, adapting it for use in small vehicles is very difficult because the pressure during refilling would be too great.
The solution? Powerpaste.
A German team of researchers, led by Marcus Vogt, have come up with an interesting "powerpaste", which can store hydrogen energy at atmospheric pressure, ready for release when needed. It is so named because it comes in tubes and looks like toothpaste（牙膏）, not in its traditional form of gas.
The main ingredient（原料）of the paste is magnesium hydride, a substance that reacts with water to form hydrogen. The escaped hydrogen can then be directed into a fuel cell, where it reacts with oxygen from the air to produce electric power.
Refueling is very simple, as instead of going to a filling station, drivers and riders can simply replace an empty tube with a new one and refill the water tank.
Given that powerpaste only begins to break down at temperatures of around 250℃ it remains safe even when a vehicle stands in the baking sun for hours.
However, we will have to be patient. Just because researchers have succeeded in developing a new fueling way does not mean that we can expect to see such vehicles on the road anytime soon. It will indeed be several years before this concept is turned into reality.
1. As a fuel, what is the advantage of hydrogen over oil?| A．Refilling empty tanks will be more convenient. |
| B．It is less likely to worsen global warming |
| C．More energy can be packed in the same space. |
| D．It will produce pure water for people to drink. |
| A．The practical difficulties to use hydrogen as fuel in small vehicles. |
| B．The detailed processes of adapting a strong tank in small vehicles. |
| C．The differences in fueling between large vehicles and small ones. |
| D．The tricks of building strong tanks in small vehicles. |
| A．inexpensive | B．powerful | C．convenient | D．environment-friendly |
| A．Powerpaste-driven vehicles sometimes move very slowly on the road. |
| B．Practical use of powerpaste-driven vehicles will not come very soon. |
| C．Powerpaste-driven vehicles can only work after being in the sun for hours |
| D．It will be years before the researchers work out the concept of powerpaste. |
2 . Over the past half-century, scientists have settled on two reasonable theories related to baby talk. One states that a young child’s brain needs time to master language. The second theory states that a child’s vocabulary level is the key factor. According to this theory, some key steps have to occur in a logical sequence before sentence formation occurs.
In 2007, researchers at Harvard University, who were studying the two theories, found a clever way to test them. More than 20,000 internationally adopted children enter the U.S. each year. Many of them no longer hear their birth language after they arrive, and they must learn English more or less the same way infants(婴儿) do. International adoptees don’t take classes or use a dictionary when they are learning their new tongue. All of these factors make them an ideal population in which researchers could test these competing theories about how language is learned.
Neuroscientists Jesse Snedeker, Joy Geren and Carissa Shafto studied the language development of 27 children adopted from India between the ages of two and five years. These children began learning English at an older age than US natives and had more mature brains. Even so, just as American-born infants, their first English sentences consisted of single words. The adoptees then went through the same stages as typical American-born children, though at a faster clip. The adoptees and native children started combining words in sentences when their vocabulary reached the same sizes, further suggesting that what matters is not how old you are or how mature your brain is, but the number of words you know.
This finding—that having more mature brains did not help the adoptees avoid the baby talk stage—suggests that babies speak in baby talk not because they have baby brains, but because they have only just started learning and need time to gain enough vocabulary. Before long, the one-word stage will give way to the two-word stage and so on. Learning how to chat like an adult is a gradual process.
But this finding also raises an even older and more difficult question. Adult immigrants who learn a second language rarely achieve the same proficiency in a foreign language as the average child raised as a native speaker. Researchers have long suspected there is a “critical period” for language development, after which it cannot proceed with full success to fluency. Yet we still do not understand this critical period or know why it ends.
1. What is the writer’s main purpose in Paragraph 2?| A．To argue that culture affects the way children learn a language. |
| B．To give reasons why adopted children were used in the study. |
| C．To reject the view that adopted children need two languages. |
| D．To justify a particular approach to language learning. |
| A．Language learning takes place in ordered steps. |
| B．Some children need more conversation than others. |
| C．Children with more mature brains skip baby talk stage. |
| D．Vocabulary makes little difference to sentence formation. |
| A．children start to learn a second language |
| B．immigrants want to learn another language |
| C．adults need to be taught by native speakers |
| D．language learners may achieve native-like fluency |
| A．What is baby talk. |
| B．Why babies learn a second language easily. |
| C．What affects children’s language development. |
| D．How children expand their vocabulary gradually. |
3 . Many people have felt isolated and afraid during the pandemic this year, and the Weber family is no different. But 11-year-old Emerson Weber has a hobby that has turned into a remarkable antidote. Emerson writes letters — lots of letters. One day last spring, she even wrote to Doug, her mail carrier. “I want to thank you for taking my letters and delivering them,” she said. “You are very important to me.”
In no time at all, Emerson’s simple thank-you note was shared around the United States Postal Service (USPS). Many of the workers who read it wrote her back. Her father was so moved by the response that he took to Twitter to share his appreciation for the outpouring of love.
“Emerson, my 11-year-old, is on a bit of a wild ride with the USPS and our local mail carrier, Doug.” The next day after Emerson gave Doug the letter, a package arrived with two letters. Doug had shared Emerson’s letter with his supervisor, Sara, and they both wanted to share how touched they were.
The next week, they got a letter addressed to “Mr. and Mrs. Weber”. It seemed that Sara had shared Emerson’s note as a “Token of Thanks” in the internal USPS newsletter, and there were postal folks that wanted to thank her.
That day, the family saw Doug getting out of the truck with two BOXES of letters from around the country. These letters were so deeply human. They were filled with family, pets, hobbies, community, and an overwhelming sense of kindness.
But there was something more in these letters. People felt seen — some for the first time in a long time. “I work alone in a small rural post office ...” “My kids all live far away ...” “Not a lot of people think about how hard we work ...”
One wrote, “I can’t tell you how much it means to read your letter ...”
With dozens of new pen pals, Emerson did what she does best.
She wrote.
She acknowledged that there WERE a lot of letters, but she read them all.
“I’m not sharing this because I’m a proud dad,” her father wrote on Twitter. “I’m sharing it because it is relatively easy, if we take the time, to give others the one thing they need to be well — human connection. Emerson does this boldly. Her lesson to me was simple: It’s the small things that matter most.”
Send a letter. Make a call. Take a step of boldness. For yourself or for others.
1. Mr. Weber shared Emerson’s story on Twitter because ________.| A．he was moved by the readers’ response |
| B．he wanted more people to read the letter |
| C．he took great pride in being Emerson’s father |
| D．he was thankful to Doug for delivering letters |
| A．A sense of community. |
| B．The company of family. |
| C．A bond between people. |
| D．The outpouring of courage. |
| A．Selfless and patient. | B．Smart and mature. |
| C．Determined and proud. | D．Loving and grateful. |
4 . Some people say global English is no longer just controlled by British or American English,but is running free and developing uniquely local forms.Can you figure out the following terms?
“I like your smile,but unlike you put your shoes on my face.”This is a way of saying“Keep off the grass.”Or“people mountain,people sea”,which means“very crowded”.
These examples are what we call Chinglish.When it comes to Chinglish,if all you know is“good good study,day day up”,you will be considered“out man”.
Nowadays,more Chinglish words have been created,for example,a Chinese idiom is translated as“smilence”,a combination by the English word smile and silence.
Chinglish usually offers a humorous look at misuses of the English language in Chinese street signs,products,and advertising.They are favoured by some English speaking tourists and visitors.Dominic Swire has been living in Beijing for a couple of years.“I think many Chinese people complain about the Chinglish and badly translated English.But you know,sometimes for us foreigners,it’s actually quite charming to see them.I think if the translations of English in China were all perfect,then something would be lost from Chinese culture.”
However,Chinglish will probably become a“cultural relic”in the near future.Beijing has made a comprehensive plan to improve foreign language services and correct Chinglish within five years.“It is very ridiculous to see Chinglish on the signs in some scenic spots.And they are a kind of barrier for communication between Chinese and people from other countries,”a Beijinger said.
Some Chinese university experts side with Chinglish.They argue that English has absorbed elements from other languages such as French and Spanish in its growth,and now it’s Chinese’s turn.
1. What can we call Chinglish?| A．English words which get new Chinese meanings. |
| B．The Chinese words which are difficult to translate. |
| C．The words combining English vocabulary and Chinese grammar. |
| D．The local words preventing foreigners from learning Chinese well. |
| A．Saying nothing but to smile. | B．Smiling without being noticed. |
| C．Laughing at somebody. | D．Knowing little about speech. |
| A．It can show the humour of Chinese. | B．It will attract more foreign tourists. |
| C．It helps him to learn Chinese well. | D．It seems part of Chinese culture. |
| A．Because it has become a unique bridge between Chinese and English. |
| B．Because Chinglish is a chance to enrich Chinese and English. |
| C．Because it improves the understanding between Chinese and foreigners. |
| D．Because Beijing is determined to get rid of Chinglish signs. |
5 . Ray Tokuda,a 54-year-old Japanese American,takes pride in the title his school has already given him.He is a Shifu,a Chinese word literally meaning a master,mentor or senior practioner of martial arts.
Surely, he has reason to be proud.He has been involved with Chinese martial arts for almost 40 years.After learning them at the martial arts school in New Mexico State,he is among the most experienced kung fu teachers of the school today.
Practicing martial arts two to three hours and helping students improve their skills have become Tokuda’s daily routine.He expects to practice and teach martial arts for the rest of his life.“I’m still learning.It’s worth more than a lifetime to learn Chinese martial arts,”he said.“Once I started,I just couldn’t stop.I think it’s also the magic of Chinese culture.”
Tokuda was sent to the martial arts school when he was 10.He still remembers how unwilling he was when starting out.“I remember my father had always wanted to learn Chinese martial arts but never got the chance,so he put his kid in,”he said.“I was so afraid at that time because I thought kung fu was all about fighting.”
But things changed after he learned that martial arts were more than punching and kicking.
“One of the things martial arts teach me is to overcome adversity,”Tokuda said.“As a little kid,my first lesson was like,oh,look,this is a thing that I can get through by diligence,perseverance（毅力）and dedication,and that was priceless for my life.”
Learning Chinese martial arts opened a gateway for him to better understand the culture of China.
Meanwhile,Tokuda has also been invited to various events in his home state to showcase traditional Chinese culture,including the dragon dance and lion dance,which he also learnt at the martial arts school.Because of this,he is now considered a cultural envoy(使者)in the eyes of the public.
1. At first,Tokuda weren’t willing to learn kung fu because he had thought it was______.| A．practical | B．magical | C．violent | D．difficult |
| A．He learnt martial arts from his mother. |
| B．He is the founder of the kung fu school. |
| C．He learnt from martial arts how to solve difficulties. |
| D．He is the most experienced kung fu teacher of his state. |
| A．Modest and friendly. |
| B．Persevering and devoted. |
| C．Talented and humorous. |
| D．Motivated and considerate. |
6 . For decades,Americans have been sorting their trash believing that most plastic could be recycled.But the truth is that the vast majority of all plastic produced can't be or won't be recycled.In 40 years,less than 10% of plastic has been recycled.
A news programme Frontline,by NPR and the PBS,found that oil and gas companies- the makers of plastic-have known that all along,even as they spent millions of dollars telling the American public the opposite.The plastics industry officials said the industry is providing money for new technology that they believe will get recycling plastic up to scale.The goal,they said,is to recycle 100% of the plastic they make in 5 years.
But the more plastic is recycled,the less money the industry will make by selling new plastic.And those profits have become increasingly important.Companies have told shareholders（股东）that profits from using oil and gas for transport are expected to decline in coming years with the increasing use of electric cars.The industry leaders expect oil and gas demands from the chemical industry will be much greater than the demand from the transport side in the coming decade.Plastic production overall is now expected to rise three times by 2050,and once again,the industry is spending money on advertisements and public relations to promote plastic recycling.
Plastic is now more common than it's ever been and harder to recycle.Gas prices remain at historic lows,making new plastic cheaper than recycled plastic.And the industry now produces many more different-and more complex-kinds of plastics that are more costly to sort and in many cases can't be recycled at all.Efforts to reduce plastic use are mounting nationwide,but any plan to slow the growth of plastic will face an industry with billions of dollars of future profits to lose.
1. What do we know about the goal of 100%plastic recycling?| A．It's modest. |
| B．It's achievable. |
| C．It's urgent. |
| D．It's unreal. |
| A．By selling electric cars. |
| B．By adding emphasis on recycling. |
| C．By increasing plastic production. |
| D．By meeting the needs of transport. |
| A．Increasing. |
| B．Working. |
| C．Failing. |
| D．Decreasing. |
| A．Should Plastic Be Recycled? |
| B．Can Plastic Waste Be Handled? |
| C．Recycle Plastic or Sell More? |
| D．Plastic Products or Substitutes? |
7 . Hibernation
For people who aren’t fans of winter, animals that hibernate seem to have the right idea: It’s the equivalent of burying your head under the covers until spring comes — isn't it? Not quite.
“Most of the physiological functions are extremely slowed down,” says Marina Blanco, a postdoctoral associate at the Duke Lemur (狐猴) Center in Durham, North Carolina. For example, when lemurs hibernate, they reduce their heart rates from over 300 beats per minute to fewer than six, says Blanco. And instead of breathing about every second, they can go up to 10 minutes without taking a breath. Their brain activity “becomes undetectable.” This is very different from sleep, which is gentle resting state where unconscious functions are still performed.
Put simply: “Hibernation is a means of energy conservation,” says Kelly Drew, a neuropharmacologist at the University of Alaska Fairbanks who studies the brain chemistry of hibernating Arctic ground squirrels.While hibernation is often seen as a seasonal behavior, it’s not limited to cold-weather animals. There are tropical hibernators that may do so to beat the heat. And “some species hibernate in response to food shortages,” notes Drew. For example, echidnas ( 针 鼹 ) in Australia will hibernate after fires, waiting until food resources rebound to resume normal activities.
To slow their metabolism (新陈代谢), animals cool their bodies by 5 to 10 °C on average. The Arctic ground squirrels Drew works on can take this much further, supercooling to subfreezing temperatures. Drew’s research has shown that cooling is likely regulated by levels of adenosine (腺苷) in the brain. Not only does adenosine increase in winter in ground squirrels, the receptors for the molecule become more sensitive to it.
But species don’t stay in their cold, sleeping state for the duration of their dormant period. About 80 percent of their energy is spent intermittently (间歇地) waking and warming up. Why they do this is “one of the greatest mysteries” of the field, says Thomas Ruf, a professor of animal physiology at the University of Veterinary Medicine in Vienna. Some think they need to turn back on their immune systems to fight disease, while others think they may simply awaken so they can sleep.
One bird and a variety of amphibians(两栖动物), reptiles and insects also exhibit hibernation-like states. There is even at least one fish — the Antarctic cod — that slows down its metabolism in winter, becoming 20 times less active. And, of course, there are lots of mammals. While bears might be the first that come to mind, most mammalian hibernators are on the smaller side. “The average hibernator weighs only 70 grams,” says Ruf. That’s because little bodies have high surface area to volume ratios, making it more taxing for them to stay warm in cold weather — so they need the seasonal energy savings more than larger animals.
1. How does the author distinguish between hibernation and sleep?| A．By highlighting reasons. | B．By presenting definitions. |
| C．By introducing arguments. | D．By comparing the data. |
| A．animals cool their bodies by 5 to 10°C on average |
| B．tropical hibernators may hibernate to beat the heat |
| C．some species hibernate in response to food shortage |
| D．hibernation is most often seen as a seasonal behavior |
| A．when certain animals hibernate | B．what kinds of animals hibernate |
| C．why some animals hibernate | D．how animals hibernate |
| A．It is harder for smaller animals to keep warm in winter. |
| B．The cooling of bodies may influence the levels of adenosine. |
| C．Scientists don’t agree on the reasons of intermittent hibernation. |
| D．Body functions are still unconsciously performed during hibernation. |
8 . For several decades, there has been an extensive and organized campaign intended to generate distrust in science, funded by those whose interests and ideologies are threatened by the findings of modern science. In response, scientists have tended to stress the success of science. After all, scientists have been right about most things.
Stressing successes isn’t wrong, but for many people it’s not persuasive. An alternative answer to the question “Why trust science?” is that scientists use the so-called scientific method. If you’ve got a high school science textbook lying around, you’ll probably find that answer in it. But what is typically thought to be the scientific method — develop a hypothesis (假设), then design an experiment to test it — isn’t what scientists actually do. Science is dynamic: new methods get invented; old ones get abandoned; and sometimes, scientists can be found doing many different things.
If there is no identifiable scientific method, then what is the reason for trust in science? The answer is how those claims are evaluated. The common element in modern science, regardless of the specific field or the particular methods being used, is the strict scrutiny (审查) of claims. It’s this tough, sustained process that works to make sure faulty claims are rejected. A scientific claim is never accepted as true until it has gone through a lengthy “peer review” because the reviewers are experts in the same field who have both the right and the obligation (责任) to find faults.
A key aspect of scientific judgment is that it is done collectively. No claim gets accepted until it has been vetted by dozens, if not hundreds, of heads. In areas that have been contested, like climate science and vaccine safety, it’s thousands. This is why we are generally justified in not worrying too much if a single scientist, even a very famous one, disagrees with the claim. And this is why diversity in science — the more people looking at a claim from different angles — is important.
Does this process ever go wrong? Of course. Scientists are humans. There is always the possibility of revising a claim on the basis of new evidence. Some people argue that we should not trust science because scientists are “always changing their minds.” While examples of truly settled science being overturned are far fewer than is sometimes claimed, they do exist. But the beauty of this scientific process is that it explains what might otherwise appear paradoxical (矛盾的): that science produces both novelty and stability. Scientists do change their minds in the face of new evidence, but this is a strength of science, not a weakness.
1. How does the author think of the scientific method?| A．Stable. | B．Persuasive. |
| C．Unreliable. | D．Unrealistic. |
| A．Explained. | B．Examined. |
| C．Repeated. | D．Released. |
| A．it is not persuasive to reject those faulty claims |
| B．settled science tends to be collectively overturned |
| C．a leading expert cannot play a decisive role in a scrutiny |
| D．diversity in knowledge is the common element in science |
| A．Put Your Faith in Science | B．Defend the Truth in Science |
| C．Apply Your Mind to Science | D．Explore A Dynamic Way to Science |
9 . She Walked Through Fire
On Thanksgiving weekend, the Heffelmire family gathered for a meal at their home. After dinner, the family went down to the finished basement to relax except Charlotte’s father, Eric, who was in the garage to fix his truck.
Around 8 pm, Charlotte decided to check on her dad. She walked through the kitchen. When she opened the side door to the garage, black smoke rose up into the kitchen. She could barely make out her father lying on his back, trapped under the truck. He’d removed the front passenger-side tyre and raised the truck on a jack(千斤顶). The truck had slipped off the jack, and now the whole weight of the wheel was on his chest and shoulders.
Charlotte ran to the front of the truck and struggled to lift it. Eric was still conscious, and he yelled, “You got it! One more try!?” She tried again and was able to tip the truck backward just enough for her to pull her dad by the shirt with both hands from under the truck.
She dragged him across the garage and 20 feet down the driveway. Then she ran back to the garage, which had burst into flames. “I was afraid the car was going to explode,” says Charlotte, so she climbed into the truck, which faced forward, turned the key, and pressed the gas pedal(油门). The car slowly rolled out, the metal wheel scratching loudly against the concrete.
Safely on the driveway, Charlotte stopped the truck and ran back to the basement. “There’s a fire! Everybody get out!” she yelled as she picked up her three-month-old niece and ran out. Outside, she handed the baby to her mom, and then ran around to the burning garage. She picked up a garden hose(水管) and sprayed the fire while calling 911.
A few minutes later, firefighters and an ambulance arrived. Charlotte was treated for second-degree burns on both her feet and face. Her dad had injuries on his chest and shoulders, as well as minor burns on his face. The garage and the house were damaged but the family survived.
The Heffelmires are staying in an apartment while their house is rebuilt. “Charlotte is a remarkable kid,” says her dad. Charlotte, however, simply says, “I was saving my family and my house. I wasn’t going to let my dad die.”
1. Eric got trapped because ________.| A．the kitchen was on fire | B．the wheel fell off the truck |
| C．the front tyre was removed | D．the truck slipped off the jack |
| A．the truck exploded |
| B．the house was not fit to live in |
| C．the three-month-old baby was injured |
| D．Charlotte was burned on her chest and shoulders |
| A．proud and clear-headed | B．modest and easy-going |
| C．calm and quick-minded | D．independent and self-centered |
10 . The Occupy Wall Street protest movement has raised serious questions about the role of capitalist institutions, particularly corporations in American society. Well before the first protester set foot in Zucotti Park, a heckler(扰乱分子) urged Mitt Romney to tax corporations rather than people. Romney’s response-- “Corporations are people” stirred a brief but intense controversy. Now thousands of demonstrators have in effect joined the heckler, denouncing(抨击) corporations as “enemies of the people.”
Far more important than questions about what corporations are is the question of what attitude we should have toward them. Should we, as corporate public relations statements often suggest, think of them as friends (if we buy and are satisfied with their products) or as family (if we work for them)? Does it make sense to be loyal to a corporation as either a customer or as an employee？More generally, even granted that corporations are not fully persons in the way that individuals are, do they have some important moral standing in our society？
My answer to all these questions is no, because corporations have no core dedication to fundamental human values. Such corporations exist as instruments of profit for their shareholders. In fact, left to themselves, they can be serious threats to human values that conflict with the goal of corporate profit. Corporations are a particular threat to truth, a value essential in a democracy, which places a premium on the informed decisions of individual citizens. The corporate threat is most apparent in advertising, which explicitly aims at convincing us to prefer a product regardless of its actual merit. Their defining goal is to generate profit. There are cases when telling the truth is the best means to advance corporate profits. In 1982, when seven people in Chicago died from poisoned Tylenol, Johnson & Johnson appealed to its credo, which makes concern for its customers primary corporate goal，and told the entire truth about what had happened. This honesty turned a potential public-relations disaster into a triumph. But Johnson & Johnson’s impressive corporate credo ends by saying, “Our final responsibility is to our stockholders and must make solid profit. The credo is unclear about what happens when there is a conflict between responsible action and long-term profit.
None of this means that corporations are evil or that socialism should replace the free-enterprise system. As Michel Foucault said of all power structures, it’s not that corporations are bad but that they are dangerous. The self-serving corporate speech that fills our media and halls of government is particularly dangerous for our democracy. At least for this reason, the Occupy Wall Street protesters are right to distrust corporations.
1. Mitt Romney most probably believes that ___________.| A．individuals should pay more taxes than corporations |
| B．corporations should not be forced to pay more taxes |
| C．people should care more about corporations’ development |
| D．corporations should enjoy all the legal rights as people do |
| A．should be set as moral examples of the society |
| B．take employees’ faithfulness as part of their goals |
| C．contribute little to the most essential human values |
| D．are actually means by which people share profits |
| A．corporations always make profits at the expense of people’s health |
| B．customers should always keep an eye on the quality of any product |
| C．corporations take economic profit as their priority essentially |
| D．corporation profit is always in contradiction with customer interests |
| A．Corporations, People and Truth |
| B．Corporations Are Different from People |
| C．Corporations Are Untrustworthy |
| D．The Occupy Wall Street Protest |
