1 . Time Travel
If you could travel in time, where would you go? Perhaps you would watch an original performance of a Shakespeare's play in Elizabethan England. What about hanging out with Laozi in the Spring and Autumn Period? Or maybe you'd voyage far ahead of the present day to see what the future holds.
The possibility of time travel is indeed appealing. Stories exploring the subject have been around for hundreds of years. Perhaps the best known example is science fiction The Time Machine, which was written by H. G. Wells and published in 1895 for the first time. It was adapted for at least two feature films of the same name, as well as two television versions, and a large number of comic book adaptations. The term “time machine” , invented by Wells, is now universally used to refer to a vehicle transporting people into the far future.
But could time travel actually be possible? Some scientists say yes, in theory. They propose using cracks in time and space called “wormholes”, which could be used as shortcuts to other periods. Einstein's theory of relativity allows time travel in extreme circumstances. And British theoretical physicist Stephen Hawking says you could travel into the future with a really fast spaceship going at nearly the speed of light.
Even if you could travel into the past, there is something called the “grandfather paradox”. It asks what would happen if a time traveler were to go back in time and have his own grandfather killed for some reason, and therefore prevent himself from being born. If the time traveler wasn't born, how would he travel back in time?
And would you really like to visit the future? In H. G. Wells' book, the main character travels into distant time. He arrives at a beach where he is attacked by giant crabs. He then voyages 30 million years into the future where the only living thing is a black object with tentacles（触角）. If that's what's in store, maybe we are better just living in the present day after all.
1. Why is the novel The Time Machine mentioned in Paragraph 2?| A．To praise the contribution of H. G . Wells. |
| B．To state the story's different features. |
| C．To prove the long history of time travel. |
| D．To show people's interest in time travel. |
| A．There is the possibility to invent the time machine. |
| B．They push the invention of the first spaceship. |
| C．They have been proved wrong by some time travelers. |
| D．There are differences in many ways between them. |
| A．The traveler is prevented from meeting his grandfather. |
| B．The grandfather's death makes the traveler's birth impossible. |
| C．The traveler goes back in time to seek for his grandfather. |
| D．The reunion of the traveler and his grandfather brings happiness. |
| A．Skeptical. | B．Unclear. | C．Supportive. | D．Unconcerned. |
2 . What makes a human being? Is it our thoughts? Our emotions? Our behavior?
All of these things make us who we are, but at the center of the matter is the genome (基因组) — the genes inside our bodies that may determine everything from our hair colour to our intelligence. But if we could change our genome, what would it mean to us?
In an online video posted on Nov 26, He Jiankui, a biological researcher from Southern University of Science and Technology in China, said that he had helped to make the world’s first genetically edited babies.
These are twin girls, born in November, with genes edited in an attempt to help them fight against possible future infection (感染) with the AIDS virus.
He said that he chose to do this because HIV infections are a big problem in China. “I feel such a strong responsibility that it’s not just to make a first, but also to set an example,” He told the Associated Press(AP).
The announcement has caused an international storm. Some believe that success will benefit the families of HIV patients. Considering that HIV is “a major and growing public health threat,” attempted gene editing for HIV is justifiable, Harvard Medical School genetics professor George Church told AP.
However, others think that gene editing technology is still unsafe to attempt.
“Gene editing itself is experimental and is still associated with unexpected mutations (突变), causing genetic problems early and later in life, including the development of cancer,” Julian Savulescu, a specialist in ethics at the University of Oxford, told BBC News.
Others fear that this could open the door to using gene editing technology to make designer babies. It might give the parents the choices to choose everything from their baby’s eye color to intelligence.
“You could find wealthy parents buying the latest ‘upgrades’ for their children, leading to even greater inequality than we already live with,” Marcy Darnovsky, director of the San Francisco Center for Genetics, told BBC News.
However, Merlin Crossley, a biologist at the University of New South Wales, Australia, believes that’s a long way off. According to him, many genes produce qualities like height and intelligence — not to mention environmental influences.
And he believes the technology will be better controlled in the future.
“It’s hard to get genies (妖怪) back into bottles — but I’m optimistic that this technology, which I think of as ‘genetic surgery’, could be controlled quite effectively in the future,” Crossley told ABC News.
1. Why did He Jiankui make the genetically edited babies?| A．Because he wanted to be a leader in gene editing technology. |
| B．Because he tried to do his part in fighting against HIV infection. |
| C．Because he attempted to help the twin girls who were infected with AIDS. |
| D．Because he wanted to became the first to make the genetically edited babies in the world. |
| A．Gene editing can cause genetic problems sooner or later in life |
| B．Gene editing may widen the gap between the rich and the poor |
| C．Gene editing may enable wealthy parents to design their babies |
| D．Gene editing can determine everything inside a person’s body |
| A．Absurd. | B．Hopeless. | C．Acceptable. | D．Skilful. |
| A．Gene editing: the genie in the bottle |
| B．Gene editing: the way we should go |
| C．Gene editing: hope or fear for human beings |
| D．Gene editing: a great success in human history |
In case we couldn't live on Earth one day, scientists put
It's undeniable: Being among the first to try out a new piece of technology is cool. There's the excitement of doing what has never been done before-the feeling that you're living in the future. And when you're the sole member of your social circle with the latest hot gadget, people stare in fascination. They ask you questions. They see you as the holder of powerful, secret knowledge-for a little while, until the next big thing comes along. People tend to underestimate the costs of this temporary coolness, which they pay in more ways than one. Don't fall into the early adopter trap. Don't join the first wave of consumers who invest in the latest media-hyped hardware; instead, wait and see.
To put it frankly, early adoption is a bad investment. First, the earliest versions of devices are not only expensive, they are also the most expensive that those devices will ever be. Companies are presumably attempting to recover the cost of production as fast as they can, and they know that there are serious tech-lovers who will pay a great deal to be first. Once the revenues from early adopters' purchases are safely in their hands, they can cut the price and shift to the next marketing phase: selling the product to everyone else. This is why the cost of the original iPhone dropped about U. S. $200 only eight months after its release. Plus, electronics hardly ever become more expensive because intense competition in the industry puts downward pressure on prices over time. Prices of gadgets will fall shortly after release, and they will likely keep falling. Many new TV models drop significantly in price as little as ten days after hitting the market. Further, electronics rapidly depreciate because they become obsolete (废弃的)so quickly. This means that early adopters pay the maximum price for an item that does not hold onto its value. The resale price of a cell phone or laptop can drop by fifty percent within just a few months.
Speaking of becoming obsolete, those who are first to leap into a new technology risk (三野志) wasting money and time on something that will never catch on. Another good reason to resist the early-adoption temptation is that the first version of a product typically has defects that cost a lot in time and frustration. Such problems are so common with new technology that early adopters are basically unpaid beta testers and troubleshooters. Unless this sounds to you like a fun way to spend your time, don't be among the first users. If you wait to learn what the problems are with a new electronic gadget, you can look forward to a smoother experience—or choose a less troublesome product.
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5 . Smart cities are coming. And you can be sure that hackers (黑客) won’t be very far behind. We’ve already gotten a glimpse of that future, as cities across the globe start to use technology to connect their services and people in ways that were science film just a few years ago. They are using sensors to collect data — such as traffic, garbage collecting, and road conditions —and then using that data to deliver services to more people and more efficiently.
But this rush to become a smart city has a major weakness: The more connected a city is, the easier it is to cyber-attacks. Hackers have, in recent years, effectively held cities hostage through ransom ware (赎金器), sometimes damaging critical systems for months at a time. The damage can cost millions to repair, as Baltimore and Atlanta have discovered.
And this is just the beginning. As cities add connectivity to their streetlights, power grids, dams, transit lines and other services, they are adding more targets that are possible to be hacked. What’s more, as additional information on people is collected, officials worry the result —lots of data could attract nation-states or terrorists who could use the data to launch physical and cyber war.
What cyber security lesson can’t be taught in this hack? For example: Don’t open email attachments from unfamiliar sources; don’t click on unrecognized links; don’t leave sensitive information visible on the walls or surfaces of your office.
But let’s just stick to the most important lesson: The information you share on social media can be used to profile and target you, whether that’s by engineering click bait (点击诱饵) aimed at your particular interests, guessing your password based on your birthday or figuring out your schedule and travels so that an intruder can access your home or office.
Wednesday, September 18, 2019 THE WALL STREET JOURNAL.
1. What did people use to think of smart cities?| A．It was the product of science. | B．It was sure to be popular. |
| C．It existed in imagination. | D．It improved people’s life. |
| A．Introduce the harm of hackers. |
| B．Show the danger of a smart city. |
| C．Add some background information. |
| D．Summarize the previous paragraphs. |
| A．It is convenient to provide service. |
| B．It is certain to bring about progress. |
| C．There are actually potential dangers. |
| D．There’s competition in high technology. |
| A．Describe. | B．Protect. | C．Impress. | D．Fund. |
注意：1)词数100左右；
2)可适当增加细节，以使行文连贯；
3)开头和结尾已给出，不计入词数。
Good morning, ladies and gentlemen.
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Thank you for your listening!
7 . What if the Moon had never existed? For starters we know that the geophysical and climatological history of the Earth would have been different. Although there is still large uncertainty about how the Moon was formed, the most currently favored theory describes a disastrous collision between the Earth and another planetary object.
That event forever changed many aspects of the Earth's evolution. For example, with a relatively large natural satellite putting gravitational tidal forces (潮汐力) on it, the Earth's spin behavior has been quite different than it would have been otherwise. Day length has increased more rapidly than without a moon. And the natural changes in the direction of the Earth's spin axis (轴)-its poles-have been less than they would have been otherwise. A shorter day length and axial variations like these would have changed the Earth's climate history, and almost certainly have changed the way any life evolved.
But if a species like us had still appeared, its landscape for space exploration would also have been completely different. Without a large natural satellite, a mere quarter of a million miles away, there would have been no "easy" trip to make to another world. If there had been a first human mission to another world, it would likely have been to Mars. But this would surely have called for far more extensive designing of spacecraft and life-support systems for deep space. Perhaps instead the initial focus would have been entirely on Earth-orbiting equipment for people and robotic missions to other worlds. Or, maybe the attraction of the seemingly near impossible would still have encouraged these humans from an alternate reality to take the great leap to Mars as their first step outwards.
It is of course, impossible to know exactly what our world would really be like without the Moon-both physically, and in terms of human exploration. But one thing does seem clear: we probably take our natural satellite's existence far too much for granted. Not every inhabited planet in the universe will have its own ready-made gateway to the universe.
1. Why does the author use the question at the very beginning?| A．To introduce the widely accepted theory. | B．To mention the destructive collision. |
| C．To prove a wrong assumption. | D．To attract readers' interest. |
| A．Compare day lengths in different climates. |
| B．Introduce the evolution of life on the Earth. |
| C．Explain why the Earth's spin behavior remains. |
| D．Show how the Moon greatly influences the Earth. |
| A．The Earth's evolution. | B．The mission to Mars. |
| C．The trip to the Moon. | D．Earth-orbiting equipment. |
| A．To call on people to study the Earth. |
| B．To stress the significance of the Moon. |
| C．To speak highly of human exploration. |
| D．To prove assumptions about moonless Earth. |
8 . The year is 2094.It has been announced that a comet (彗星) is heading towards the earth.Most of it will miss our planet,but two pieces will probably
On 17 July,a piece four kilometers wide enters the earth’s
Before the waves reach South America, the second piece of the comet
Could it really
| A．attack | B．hit | C．beat | D．damage |
| A．air | B．environment | C．situation | D．atmosphere |
| A．rest | B．other | C．remaining | D．half |
| A．sound | B．light | C．earth | D．air |
| A．burns | B．destroys | C．harms | D．boils |
| A．enters | B．comes | C．flies | D．lands |
| A．sent | B．set | C．caused | D．made |
| A．rocks | B．waves | C．earth | D．shakes |
| A．hurt | B．changed | C．ruined | D．injured |
| A．colored | B．hidden | C．polluted | D．shut |
| A．come out | B．erupt | C．take place | D．break out |
| A．water | B．money | C．food | D．the earth |
| A．be true | B．happen | C．hit the earth | D．destroy the world |
| A．have been | B．had been | C．were | D．would be |
| A．for | B．through | C．with | D．on |
1. What was the news about?
| A．It’s about the space station. |
| B．It’s about the space. |
| C．It’s about the astronauts. |
| A．Because he hopes to go to the moon. |
| B．Because he is an astronaut. |
| C．Because he wants to do research in space. |
10 . You are just waking up in the spring of 2030. Your Internet of Things bedroom opens solar powered e-windows and plays gentle music while your smart lighting displays a montage (剪辑的)of beachfront sunrises from your recent vacation.
Your shower uses very little water or soap. It recycles your grey water and puts the extra heat back into your home's operating system. While you dress, your artificial intelligence (Al) assistant shares your schedule for the day and plays your favorite tunes.
You still start your day with a coffee but it comes from your lot refrigerator which is capable of providing a coffeehouse experience in your home. A hot breakfast tailored to your specific nutritional needs (based on chemical analysis from your trips to the “smart toilet” is waiting for you in the kitchen.
When it's time to leave, an on-demand transport system has three cars waiting for you, your wife (or husband) and your kids. On the road, driverless cars and trucks move with mathematical accuracy, without traffic jams, routine maintenance or road rage. Accident rates are near zero.
On the way, you call your R&D team, who are enveloping a day's work in Shanghai. Your life-sized image is projected (投射)into the China Innovation Centre and your colleagues see you as if you were sitting in the room. It’s a bit surreal for them to see you in the morning light given that it's dark on the Bund, Shanghai's waterfront, though the novelty disappears after a few uses.
You review the day's cloud-based data from your Shenzhen manufacturing center, your pilot project in San Diego, and your QA team in Melbourne. The large amounts of datasets were collected in real-time from every piece of equipment and have been beautifully summarized by your company's AL All these facilities are closely maintained and operated through a advanced predictive analytics platform.
Pleased with the team's progress, you end the call and ease into a good book.
This is the future and it will be here sooner than you think.
1. How can we describe the life in the future?| A．Artificial | B．Accurate | C．Remarkable | D．Intelligent |
| A．We can have a bath without using water. |
| B．We can drive to work without concerning any accidents. |
| C．We can enjoy the coffeehouse experience without going there. |
| D．We can deal with all our work at home without turning to others for help. |
| A．In time order. | B．In logical order. |
| C．By comparing. | D．By offering examples. |
| A．To attract us to use the Al system. |
| B．To introduce the life in the future. |
| C．To teach us how to use the Al system. |
| D．To encourage us to study hard for the future. |
