1 . A review of 100 years of fossil evidence reveals that 100 million years ago part of the Sahara Desert was arguably the riskiest place on our planet,wih a concentration of large predatory(食肉的）dinosaurs unmatched in any comparable modern ecosystem on land. The analysis of fossils from theso-called Kem Kem beds shows the presence in the area of large-scale predatory dinosaurs,reptiles and other hunters, all living together in what was at the time a river system full of very large fish, rather than a desert.
Paleontologist Nizar Ibrahim, lead author of the study, said that the Kem Kem ecosystem was a highly enigmatic place,ecologically speaking, since typically ecosystems present a larger number of plant-eating animals than predators, and predators themselves will come in a variety of sizes,with one larger predator being dominant. In the Kem Kem beds,fossils of predators outnumber those of plant-eating dinosaurs, and several of the predators living together in the area, such as the Carcharodontosaurus, the Spinosaurus,the Abelisaur and the Deltadromeus, were as big as a Tyrannosaurus rex (T.rex) - one of the largest dinosaurs that ever lived. This is strange “even by dinosaur standards,” according to Ibrahim, since the T. rex, which was present in North America tens of millions of years later, was “the unarguable ruler of its ancient ecosystem.”
It is unlikely that the large predators in the Kem Kem ecosystem ate one another. What's more realistic, according to Ibrahim, is that they ate the abundant and supersized fish present in the area - fish like coelacanths"the size of a car” and sawfish that could reach 25 feet in length.
The study of the Kem Kem beds carried out by Ibrahim and a group of international researchers across the U.S., Europe and Africa draws attention to the importance of learning more about Africa,which remains paleontology's forgotten continent.It shows that African ecosystems"do not simply copy the ones we know from North America,Europe or other better-known places,"and it also reveals clues about what happens to life when dramatic changes in climate come into play.
1. What does the underlined word “enigmatic" in Paragraph 2 probably mean?| A．Dangerous. |
| B．Peaceful. |
| C．Puzzling. |
| D．Remote. |
| A．The T.rex was the real ruler of the ecosystem. |
| B．There once lived dangerous supersized dinosaurs. |
| C．There was an underground river instead of a desert. |
| D．The number of plant-eating dinosaurs went beyond that of predators. |
| A．Sawfish once completely dominated North America. |
| B．Coelacanths were much larger than the Deltadromeus. |
| C．The Carcharodontosaurus and the Spinosaurus lived on fish. |
| D．The Abelisaur and the T. rex became extinct at the same time. |
| A．African ecosystems have their uniqueness. |
| B．Humans have caused great changes in climate. |
| C．Fossils of predators proved to be alien species. |
| D．The Sahara Desert was formed 100 million years ago. |
2 . As reporters and editors find themselves the victims of layoffs at digital publishers and traditional newspaper chains alike, journalism generated by machine is on the rise. Roughly a third of the content published by Bloomberg News uses some form of automated technology. The system used by the company, Cyborg, is able to assist reporters in creating thousands of articles on company earnings reports each quarter. The program can analyze a financial report the moment it appears and spit out an immediate news story that includes the most important facts and figures.
In addition to covering company earnings for Bloomberg,robot reporters have been productive producers of articles on Minor League Baseball for The Associated Press (AP),high school football for The Washington Post and earthquakes for Los Angeles Times. Last week, The Guardian's Australia edition published its first machine-assisted article. And Forbes recently announced that it was testing a tool called Bertie to provide reporters with rough drafts and story templates. The New York Times has experimented with using AI to personalize newsletters.
The AP was an early adopter when it struck a deal in 2014 with Automated Insights, a technology company specializing in language generation software that produces billions of machine-generated stories a year. In addition to leaning on the software to generate minor league and college game stories, The AP has also used it to strengthen its coverage of company earnings reports. It has gone from producing 300 articles on earnings reports per quarter to 3,700.
As the use of AI has become a part of the industry's toolbox,journalism executives say it is not a threat to humans. Rather, the idea is to allow journalists to spend more time on substantive work."The work of journalism is creative, it' s about curiosity, it' s about storytelling, iť' s about digging, it' s critical thinking, it's judgment - and that is where we want our journalists to spend their energy,"says Lisa Gibbs, the director of news partnerships for The AP.
“AI was once a new shiny technology used by high tech companies,but now it' s actually becoming a necessity," says Francesco Marconi,the head of research and development at The Journal. He likened the addition of AI in newsrooms to the introduction of the telephone. “It gives you more access, and you get more information quicker," he says. “I think a lot of the tools in journalism will soon be powered by AI.”
1. What do Bloomberg and The AP have in common?| A．Both are developing language generation software. |
| B．Both use AI to produce company earnings reports. |
| C．Both work with the same AI technology company. |
| D．Both have laid off a large number of their employees. |
| A．AI is being widely applied in journalism. |
| B．Robot reporters are likely to cause problems. |
| C．Reporters and editors are facing unemployment. |
| D．Traditional media resist machine-assisted articles. |
| A．It is a well-matched substitute for journalists. |
| B．It challenges reporters to think more critically. |
| C．It liberates journalists from time-consuming tasks. |
| D．It guarantees reporters focus more on important work. |
| A．To present the weakness of telephones. |
| B．To predict journalism' s bright future. |
| C．To discuss changes in AI technology. |
| D．To show how big a step forward AI is. |
3 . The great 18th-century author Montesquieu once put it, “I have never known any stress that an hour’s reading does not reduce." And now many argue for a return to this view of literature as therapy, even using the word “bibliotherapy"（阅读疗法）to describe it.
So what does literature provide, beyond entertainment? It can act as a guide.Those who show great respect for Shakespeare, Milton or Proust should keep in mind that even the most famous author was still a human being.In other words, great writers have been through the same things as you.Like you, they found themselves in this strange world and they tried to make sense of it.And this is what most literature consists of: people trying to make sense of the world.
No matter what your fears or concerns may be, chances are some great writer has written about them.Before seeking （寻求）suggestions, cither from a professional or a well-read friend, be clear about what is troubling you.For example, let's say you were raised in a religious （信仰宗教的）family but now, in later life, have lost your faith （信仰）.This is painful to you and you feel empty and alone.Countless writers have gone down this path before you and have found a way out — the German poet and novelist Hermann Hesse, for example, wrote the wonderful little novel Siddartha about this search for spiritual peace.
It would also help to consider your particular life stage.Someone from a poor background about to set off for a great college will want a different set of reading from a retired woman whose husband has died.To take another example, let's imagine you had a childhood of abuse （虐待）.For years you have suffered from depression.In that case, you could try Edward St Aubyn's The Patrick Melrose Novels.St Aubyn's father abused him, while his mother escaped into drink, but Aubyn wrote a series of splendid novels based on his life, charting a man's journey through the hard situation of abuse and out the other end.
1. Why does the author quote Montesquieu?| A．To stress the effect of bibliotherapy. | B．To explain what bibliotherapy means. |
| C．To tell us when bibliotherapy came into being. | D．To argue for the use of literature as therapy. |
| A．Find out which writer has written about your problem. |
| B．Know what authors have gone through. |
| C．Find out how to seek spiritual peace. |
| D．Know what your trouble is. |
| A．Aubyn's novels suit people who have retired. |
| B．Aubyn's novels are mainly read by young readers. |
| C．People should choose novels according to their interest. |
| D．People of different ages need different works of literature. |
| A．What novels best suit you. | B．A form of therapy: literature. |
| C．The great influence of literature. | D．The experiences of great writers. |
4 . What is the nature of the scientific attitude, the attitude of the man or woman who studies and applies physics, biology, chemistry, geology, engineering, medicine or any other science?
We all know that science plays an important role in our societies. However, many people believe that our progress depends on two different aspects of science. The first aspect is the application of the machines, products and systems of knowledge that scientists and technologists develop. The second is the application of the special methods of thought and action that scientists use in their work.
What are these special methods of thinking and acting? First of all, it seems that a successful scientist is curious - he wants to find out how and why the universe works. He usually pays attention to problems which he notices have no satisfying explanation, and looks for relationships even if the data available seem to be unconnected. Moreover, he thinks he can improve the existing conditions and enjoys trying to solve the problems which this involves.
He is a good observer, accurate, patient and objective and uses the facts he observes to the fullest. For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum(光谱).
He does not accept statements which are not based on the most complete evidence available. He rejects authority as the only basis for truth. Scientists always check statements and make experiments carefully and objectively.
Furthermore, he does not readily accept his own idea, since he knows that man is the least reliable of scientific instruments and that a number of factors tend to disturb objective investigation.
Lastly, he is full of imagination since he often has to look for relationships in data which are not only complex but also frequently incomplete. Furthermore, he needs imagination if he wants to guess how processes work and how events take place.
These seem to be some of the ways in which a successful scientist or technologist thinks and acts.
1. Which of the following statements about a curious scientist is TRUE?| A．He doesn't find confidence and pleasure in work. |
| B．He makes efforts to investigate potential connections. |
| C．He is interested in problems that are explained. |
| D．He looks for new ways of acting. |
| A．easily appreciate others' research work |
| B．easily believe in unchecked statements |
| C．always accept authority as the only basis for truth |
| D．always use evidence from observation to the fullest |
| A．Objective and careful. | B．Curious and casual. |
| C．Cautious and arrogant. | D．Subjective and down-to-death . |
| A．Key to a successful scientist. | B．Scientists’ ways of thinking and acting |
| C．Progress in modern society. | D．Application of modern technology. |
5 . Some students get so nervous before a test. They do poorly even if they know the material. Sian Beilock, a professor at the University of Chicago in Illinois, has studied these highly anxious test-takers. The students start worrying about the results. And when we worry, it actually uses up attention and memory resources（资源）.
Professor Beilock and another researcher, Gerardo Ramirez, have developed a possible solution. Just before an exam, highly anxious test-takers spend ten minutes writing about their worries about the test.
The researchers tested the idea on a group of twenty anxious college students. They gave them two short maths tests. After the first one, they asked the students to either sit quietly or write about their feelings about the upcoming second test.
Professor Beilock says those who sat quietly scored（得分） an average of 12% worse on the second test. But the students who had written about their fears improved（提高） their performance by an average of 5%. Next, the researchers used younger students in a biology class. They told them before final exams either to write about their feelings or to think about things unrelated（不相关的） to the test. Professor Beilock says highly anxious students who did the writing got an average grade of B+, compared to a B-for those who did not.
"What we showed is that for students who are highly test-anxious, and who'd done our writing intervention（干预）, all of a sudden there was no relationship between test anxiety and grades. They were performing just as well as their classmates who don't normally get nervous in these tests."
But what if students do not have a chance to write about their fears immediately before an exam? Professor Beilock says students can try it themselves at home or in the library and still improve their performance.
1. What do the students start worrying about before an exam?| A．Whether they can pass the exams. |
| B．What other students do during the test. |
| C．Whether they have remembered the materials. |
| D．What kind of problems they will meet on the test paper. |
| A．Making the students focused on the test. |
| B．Asking the students to sit quietly before the test. |
| C．Having the students write about their worries about the test. |
| D．Asking the students to direct the attention away from the test. |
| A．became less nervous before the test |
| B．were better at controlling their feelings |
| C．did worse than those who wrote about their feelings |
| D．did better than those who wrote about their feelings |
| A．writing about our worries before an exam can work a bit |
| B．we can only write about our worries right before an exam |
| C．the best place to write about our worries is in the test room |
| D．it doesn't matter where we write about our worries before an exam |
6 . It is important to protect yourself from harmful rays. But if you think a high-factor sunscreen keeps you safe from harmful rays, you may be wrong. Research in this week’s Nature shows that while factor 50 reduces the number of melanomas(黑素瘤)and delays their occurrence, it can’t prevent them. Melanomas are the most aggressive skin cancers. You have a higher risk if you have red or blond hair, fair skin, blue or green eyes, or sunburn easily, or if a close relative has had one. Melanomas are more common if you have periodic intense exposure to the sun. Other skin cancers are increasingly likely with long-term exposure.
There is continuing debate as to how effective sunscreen is in reducing melanomas—the evidence is weaker than it is for preventing other types of skin cancer. A 2011 Australian study of 1,621 people found that people randomly selected to apply sunscreen daily had half the rate of melanomas of people who used cream as needed. A second study, comparing 1,167 people with melanomas to 1,101 who didn’t have the cancer, found that using sunscreen routinely, alongside other protection such as hats, long sleeves or staying in the shade, did give some protection. This study said other forms of sun protection—no sunscreen—seemed most beneficial. The study relied on people remembering what they had done over each decade of their lives, so it’s not entirely reliable. But it seems reasonable to think sunscreen gives people a false sense of security in the sun.
Many people also don’t use sunscreen properly applying insufficient amounts, failing to reapply after a couple of hours and staying in the sun too long. It is sunburn that is most worrying—recent research shows five episodes of sunburn in the teenage years increase the risk of all skin cancers.
The good news is that a combination of sunscreen and covering up can reduce melanoma rates, as shown by Australian figures from their slip-slop-slap campaign. So if there is a heat wave this summer, it would be best for us, too, to slip on a shirt, use sunscreen and slap on a hat.
1. What’s people’s common expectation of high-factor sunscreen?| A．It will protect them from sunburn. |
| B．It will keep their skin smooth and fair. |
| C．It will work for people of any skin color. |
| D．It will delay the occurrence of skin cancer. |
| A．Sunscreen can prevent all kinds of skin cancers. |
| B．The studies are based on direct observation of the subjects. |
| C．The studies may help people select the most effective sunscreen. |
| D．Daily application of sunscreen helps reduce the incidence of melanomas. |
| A．Staying in the shade whenever possible. |
| B．Using covering up instead of sunscreen. |
| C．Using both covering up and sunscreen. |
| D．Applying the right amount of sunscreen. |
| A．No Way to Stop Harmful Rays! |
| B．Does Sunscreen Prevent Skin Cancer? |
| C．Did You Use Sunscreen in the Right Way? |
| D．Skin Cancer—The Biggest Threat to Human Beings! |
7 . According to a recent study in the Journal of Consumer Research, both the size and consumption habits of our eating companions can influence our food intake. And contrary to existing research that says you should avoid eating with heavier people who order large portions(份), it's the beanpoles with big appetites you really need to avoid.
To test the effect of social influence on eating habits, the researchers conducted two experiments. In the first, 95 undergraduate women were individually invited into a lab to ostensibly(表面上)participate in a study about movie viewership. Before the film began, each woman was asked to help herself to a snack. An actor hired by the researchers grabbed her food first. In her natural state, the actor weighed 105 pounds. But in half the cases she wore a specially designed fat suit which increased her weight to 180 pounds.
Both the fat and thin versions of the actor took a large amount of food. The participants followed suit, taking more food than they normally would have. However, they took significantly more when the actor was thin.
For the second test, in one case the thin actor took two pieces of candy from the snack bowls. In the other case, she took 30 pieces. The results were similar to the first test: the participants followed suit but took significantly more candy when the thin actor took 30 pieces.
The tests show that the social environment is extremely influential when we're making decisions. If this fellow participant is going to eat more, so will I. Call it the “I’ll have what she's having” effect. However, we'll adjust the influence. If an overweight person is having a large portion, I'll hold back a bit because I see the results of his eating habits. But if a thin person eats a lot, I'll follow suit. If he can eat much and keep slim, why can't I?
1. What is the recent study mainly about?| A．Food safety. | B．Movie viewership. |
| C．Consumer demand. | D．Eating behavior. |
| A．Big eaters. | B．Overweight persons. |
| C．Picky eaters. | D．Tall thin persons. |
| A．To see how she would affect the participants. |
| B．To test if the participants could recognize her. |
| C．To find out what she would do in the two tests. |
| D．To study why she could keep her weight down. |
| A．How hungry we are. | B．How slim we want to be. |
| C．How we perceive others. | D．How we feel about the food. |
8 . The Amazon Echo, a voice-driven computer that sits on a table top and answers to the name Alexa, can call up music tracks and radio stations, tell jokes, answer simple questions and control smart appliances. Even before Christmas it was already resident in about 4% of American households. Voice assistants are being widely used in smart phones, too: Apple’s Siri handles over 2 billion commands a week, and 20% of Google searches on Android-powered handsets in America are input by voice. Dictating e-mails and text messages now works reliably enough to be useful. Why type when you can talk?
Simple though it may seem, voice has the power to transform computing, by providing a natural means of interaction. Windows, icons and menus, and then touch screens, were welcomed as much easier ways to deal with computers than entering complex keyboard commands. But being able to talk to computers abolishes the need for a “user interface(界面)” at all. Just as mobile phones were more than existing phones without wires, and cars were more than carriages without horses, so computers without screens and keyboards have the potential to be more useful, more powerful than people can imagine today.
Voice will not wholly replace other forms of input and output. Sometimes it will remain more convenient to converse with a machine by typing rather than talking (Amazon is said to be working on an Echo device with a built-in screen). But voice is sure to account for a growing share of people’s interactions with the technology around them, from washing machines that tell you how much of the cycle they have left to virtual assistants in corporate call centres. However, to reach its full potential, the technology requires further breakthroughs and a resolution of the tricky questions it raises around the trade-off between convenience and privacy.
Computer-dictation systems have been around for years. But they were unreliable and required lengthy training to learn a specific user’s voice. Computer’s new ability to recognise almost anyone’s speech dependably without training is the latest manifestation (证明) of the power of “deep learning”, an artificial intelligence technique in which a software system is trained to use millions of examples, usually selected from the Internet. Thanks to deep learning, machines now nearly equal humans in transcription accuracy, computerized translation systems are improving rapidly and text-to-speech systems are becoming less robotic and more natural-sounding. Computers are, in short, getting much better at handling natural language in all its forms.
Although deep learning means that machines can recognize speech more reliably and talk in a more natural manner, they still don’t understand the meaning of language. That is the most difficult aspect of the problem and, if voice-driven computing is truly to flourish, one that must be overcome. Computers must be able to understand context in order to maintain a coherent conversation about something, rather than just responding to simple, one-off (一次性的) voice commands, as they mostly do today (“Hey, Siri, set a timer for ten minutes”). Researchers in universities and at companies are working on this problem, building “bots” that can hold more detailed conversations about more complex tasks, from searching information to making travel arrangements.
Many voice-driven devices are always listening, waiting to be activated(激活). Some people are already concerned about the implications of internet-connected microphones listening in every room and from every smart phone. Not all audio is sent to the cloud - devices wait for a trigger phrase (“Alexa”, “OK, Google”, “Hey, Cortana”, or “Hey, Siri”) before they start passing the user’s voice to the servers that actually handle the requests - but when it comes to storing audio, it is unclear who keeps what and when.
1. According to Paragraph l, the Amazon Echo ________.| A．has been sold out before Christmas |
| B．has been used by most American families |
| C．came on the market later than Apple’s Siri |
| D．is more useful than smart phones in dictating e-mails |
| A．It is vital to accurate identification of human voices. |
| B．It is almost the same as the computer-dictation system. |
| C．It has helped machines understand the meaning of language. |
| D．It has helped machines beat humans in accuracy and reliability. |
| A．The devices will be in charge of their life. |
| B．The devices need to be activated before working. |
| C．They are in the dark about their data’s ownership. |
| D．Their voices can be recognized by every smart phone. |
| A．Worried. | B．Doubtful. |
| C．Supportive. | D．Objective. |
9 . Traveling with kids is 90 percent reminding yourself to live in the moment and 10 percent making up your mind to never again leave your house.
I have an uncanny ability to forget this as soon as we return home from a trip and I've finished washing piles of dirty clothes in our luggage and cleaning all the messy caused by the kids. Extremely tired and annoyed, I would actually begin to miss the place we just left!
Family travel is like childbirth, I suppose. Painful, loud, messy, sort of awful, actually, but also wonderful. And you remember only the wonderful—until you’re back on a plane and your kids are fighting over who gets the aisle seat. Then you remember the bad stuff.
Last weekend, my kids and I flew to Texas for a trip we would have nothing to complain(抱怨) about—big hotel, wonderful view.
And yet—we found things to complain about. The pool was bigger in that other hotel! Why do you get to shower first? They call this coffee?! Luckily, I’ve learned to put my metaphorical coat of armor (盔甲) on as soon as we land somewhere, and it forces complaints to bounce off me and land in a pile at my feet.
For three days, genuine fun was had and annoying complaints were heard and ignored. Until it was time to catch a plane and fly home.
Unfortunately, our flight was canceled. We spent hours finding a hotel room. We hit the hotel pool before bed and swam well into the night, my kids making up songs and laughing so hard at their silly lyrics (歌词) and their crazy good fortune to be swimming at 10: 30 on a school night.
And that was when it hit me that family travel is all those things I said before but it’s also a lot more. It’s taking your kids to parts of the world that will open their eyes and finding that actually, yours need opening too. It’s remembering that joy and memories are where you make them, not where you find them.
1. The underlined word “uncanny” in Paragraph 2 is closest in meaning to .| A．unknown. | B．uncertain. |
| C．unexpected. | D．unusual. |
| A．they both cause financial trouble and pain. |
| B．they are both hard as well as rewarding. |
| C．childhood memories come flooding back when they travel. |
| D．both of them need many preparations. |
| A．she tries to deal with the complaints more wisely and properly. |
| B．she turns those annoying complaints into a means to educate kids. |
| C．she has improved her language skills when handling the complaints. |
| D．she has succeeded in escaping kids’ fighting thanks to the armor. |
| A．family vacation benefits her kids as well as her. |
| B．joy and memories should be created rather than discovered. |
| C．the most unforgettable memory for her is about the complaints. |
| D．she has to spend some time on housework after the family vacation. |
10 . In the summer of 2016, I gave a talk at a small conference in northern Virginia. I began by admitting that I’d never had a social-media account; I then outlined arguments for why other people should consider removing social media from their lives. The event organizers uploaded the video of my talk to YouTube. Then it was shared repeatedly on Facebook and Instagram and, eventually, viewed more than five million times. I was both pleased and annoyed by the fact that my anti-social-media talk had found such a large audience on social media.
I think of this event as typical of the conflicted relationships many of us have with Facebook, Instagram, and other social-media platforms. On the one hand, we’ve grown wary of the so-called attention economy, which, in the name of corporate profits, destroys social life gradually and offends privacy. But we also benefit from social media and hesitate to break away from it completely. Not long ago, I met a partner at a large law firm in Washington, D.C., who told me that she keeps Instagram on her phone because she misses her kids when she travels; looking through pictures of them makes her feel better.
In recent months, some of the biggest social-media companies, Facebook and Twitter, in particular, have promised various reforms. In March, Mark Zuckerberg announced a plan to move his platform toward private communication protected by end-to-end encryption (端对端加密); later that month, he put forward the establishment of a third-party group to set standards for acceptable content.
All of these approaches assume that the reformation of social media will be a complex, lengthy, and gradual process. But not everyone sees it that way. Alongside these official responses, a loose collective of developers that calls itself the IndieWeb has been creating another alternative. They are developing their own social-media platforms, which they say will preserve what’s good about social media while getting rid of what’s bad. They hope to rebuild social media according to principles that are less corporate and more humane.
1. Why did the author feel annoyed when his video was spread online?| A．His video caused many arguments. |
| B．His video was shared without his permission. |
| C．His talk was opposed by a large amount of people. |
| D．His video’s popularity on social media is against his talk. |
| A．To prove that social media has some benefits. |
| B．To advise people to break away from social media. |
| C．To tell the negative effects social media may produce. |
| D．To describe people’s conflicted relationships with social media. |
| A．To attract more users. |
| B．To make more profits. |
| C．To improve network environment. |
| D．To provide more convenient service. |
| A．Develop new social-media platforms. |
| B．Set up principles of the use of social media. |
| C．Improve the existing social-media platforms. |
| D．Help social-media companies to make reformation. |
