题目内容

From self-driving cars to deep sea explorers, more and more of humans’ tasks are being taken over by robots. But technology doesn’t stop there. In mid-August, reported the BBC, scientists from Cambridge University developed a robotic system that meant a robot could “build other robots, each one better than the previous(以前的) generation”.

The BBC noted that “those concerned about machines taking over the world shouldn’t worry”.

However, over 1,000 scientists and numerous artificial intelligence (AI, 人工智能) researchers-including UK astrophysicist Stephen Hawking and Apple cofounder Steve Wozniak of the US-brought the danger of fully autonomous weapons(自主武器), known as “killer robots”, to our attention earlier this summer.

“If any major military(军事的) power pushes ahead with AI weapon development, a global arms race is inevitable(不可避免的),” warned an open letter released at the International Joint Conference on Artificial Intelligence held in Buenos Aires, Argentina.

Unlike drones(无人机), which need a human hand, this kind of robot would have some decision-making abilities and the ability to act by itself. While what the BBC called these “solders that never sleep” could help reduce battlefield deaths, they might also make countries more likely to go into battle, which would lead to more deaths overall, noted the scientists. The risks, they said, could be far greater than those posed by nuclear weapons.

Scientists called for a “ban on offensive(攻击性的) autonomous weapons beyond meaningful human control”, reported The Huffington Post.

In fact, in an interview with the BBC in 2014, Hawking warned that the “development of full artificial intelligence could spell the end of the human race”.

And according to the BBC, many leading thinkers have been thinking about the AI-powered killing machine of the not-too-distant future. “Killer robots could be here within years, not decades,” as Stuart Russell, professor of computer science at UC Berkeley, US, put it.

Authorities are gradually waking up to the risk of robot wars. Last May, for the first time, the United Nations brought governments together to begin talks on so-called killer robots in a hope of stopping such weapons while there is still time.

Meanwhile, there are scientists who are less worried. They believe all technologies have potential(潜力) for being used for good and evil ends, and argue that the ban called for by the open letter could close the door to developing AI technology that could save lives. “Technology can clearly do better than human beings in many cases,” Ronald Arkin, dean at the Georgia Institute of Technology in Atlanta, US, told The Christian Science Monitor. “If we are willing to turn over some of our decision making to these machines, we may actually get better outcomes.”

1.What does Steve Wozniak think the future robot technology might produce?

A. Artificial Intelligence. B. Autonomous weapons.

C. Soldiers that never sleep. D. Killing machines.

2.The underlined word “spell” in Paragraph 7 is closest in meaning to “______”.

A. cause B. prevent

C. reach D. change

3.What does Stuart Russell mean by saying “killer robots could be here within years, not decades.”?

A. Killer robots will visit UC Berkeley, US sooner than expected.

B. Killer robots will be produced and used sooner than expected.

C. Killer robots will speed up the development of AI in the near future.

D. Killer robots will kill these scientists in the near future.

4.What is the main idea of the text?

A. More and more of humans’ tasks are being taken over by robots.

B. Robots have decision-making abilities and the ability to act by itself.

C. Scientists called for a ban on the development of robot technology.

D. All technologies have potential for being used for good and evil ends.

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Hummingbirds(蜂鸟) are one of nature’s most energetic fliers and the only birds to hover(盘旋) in the air by relying on their strength alone.

Now scientists have found that it is the ratio(比值) of the bird’s wing length to its width that makes them so efficient. The discovery is helping experts compete with 42 million years of natural selection to build helicopters that are increasingly efficient.

David Lentink, an assistant professor at Stanford University in California, tested wings from 12 different species of hummingbirds, which he sourced from museums. He placed them on a machine used to test the aerodynamics(气力学) of the helicopter blades(桨叶). Professor Lentink’s team used the same machine to test the blades from an advanced micro-helicopter used by the UK’s army. They found that the micro-helicopter’s blades are as efficient at hovering as the average hummingbirds.

But while the micro-helicopter’s blades kept pace with the average hummingbird wings, they could not keep up with the most efficient hummingbird’s wing. The wings of Anna’s hummingbird were found to be about 27 percent more efficient than the man-made micro- helicopter’s blades.

While Professor Lentink wasn’t surprised at nature’s superiority, he said that helicopter blades have come a long way. “The technology is at the level of an average hummingbird,” he said. “A helicopter is really the most efficient hovering device that we can build. The best hummingbirds are still better, but I think it’s amazing that we’re getting closer. It’s not easy to match their performance, but if we build better wings with better shapes, we might match hummingbirds.”

Professor Lentink said that we don’t know how hummingbirds maintain their flight in a strong wind, how they navigate(确定方向) through branches, or how they change direction so quickly. He thinks that great steps could be made by studying wing aspect ratios-the ratio of wing length to wing width. Understanding these abilities and characteristics could be a benefit for robotics and will be the focus of future experiments.

1.What did the scientists find about hummingbirds?

A. Their wings are long and wide

B. They can hover in the air for a long time

C. The ratio of their wing length to wing width is very important

D. They are the most energetic flier in nature

2.Which is the right order of Professor Lentink’s research?

①Tested wings from different species of hummingbirds

②Got resources from museums

③Analyzed the results and drew a conclusion

④Tested the blades from a micro-helicopter

A. ①②③④ B. ②①③④

C. ②④①③ D. ②①④③

3.According to Professor Lentink, what will be the focus of future experiments?

A. To know how hummingbirds can fly in a strong wind

B. To know how hummingbirds change direction so quickly

C. To develop a new kind of helicopter

D. To study the secrets of hummingbirds

Many years ago,I was working as a psychologist at a children's institution in England.One day an adolescent boy____in my office.His headmaster had____him to me."David,"he wrote,"is very sad since both his parents died. He refuses to talk and I'm very____about him.Can you help?"

How could I help him?There are human tragedies psychology doesn't have the____to.Sometimes the best thing one can do is to listen____.

The first two times we met,David didn't say a word.I____we play a game of chess the third time he came.He ____.After that we played chess every Wednesday afternoon in____.It's not easy to cheat in chess,____I made sure David won once or twice.It seemed as if he enjoyed my____.But why did he never talk with me?

"Perhaps he____needs someone to share his pain with,"I____.Some months later,I sat staring at David's head, while he was bent____the chessboard.Suddenly,he looked up at me.

"It's your____,"he said.

After that day,David started talking. He got friends in school and joined a bicycle club.He wrote me____a few times about how he would try to get into university.The letters____after some time.I knew he had really started to live a(n)____life.He needn't write me any more to tell me that.

Maybe I gave David something.At least I____a lot from him.For example,David showed me____one—without any words—can reach out to another person.All it____is a hug,a shoulder to cry on,a friendly touch and an ear that listens.

1.A. turned out B. showed up C. stood out D. called up

2.A. led B. drove C. reminded D. referred

3.A. disappointed B. dissatisfied C. concerned D. confused

4.A. medicine B. answer C. method D. hope

5.A. closely B. regretfully C. pitifully D. tearfully

6.A. remembered B. suggested C. announced D. demanded

7.A. refused B. nodded C. allowed D. admitted

8.A. silence B. excitement C. turn D. time

9.A. although B. because C. but D. if

10.A. humor B. experience C. wisdom D. company

11.A. firstly B. simply C. similarly D. hardly

12.A. found B. doubted C. thought D. predicted

13.A. on B. off C. down D. over

14.A. fault B. time C. way D. tum

15.A. promises B. letters C. opinions D. choices

16.A. remained B. continued C. stopped D. lost

17.A. normal B. comfortable C. poor D. rich

18.A. saw B. learnt C. asked D. expected

19.A. when B. whether C. how D. why

20.A. matters B. takes C. leaves D. gets

There are quite a few advantages of wearing school uniforms. The idea may seem disagreeable at first, but considering all the positive effective coming from wearing uniforms you would be more likely to enjoy them.

Teachers love school uniforms because it helps provide an orderly learning environment. Having students dressed in uniforms may teach them how to present themselves in a neat and professional manner. It gives students the opportunity to learn how to dress like young ladies and gentleman. And they can focus their attention on academics rather than style.

Purchasing school uniforms is easy and needs less hesitation and consideration. No matter what the school’s policy is, there are only specific essential pieces to the wardrobe(服装) that are necessary, so it won’t break the bank. A few wardrobe items can last a long time. Parents could also enjoy an easy morning, as it will take less time to choose a set of clothes for the school day.

Students wearing uniforms will feel less pressure about what to wear or not to wear when their classmates are dressed similarly. Getting dressed before school becomes less of a chore when students are limited in their choices, so there shouldn’t be any trouble about choosing an outfit for the day and getting ready quickly. Some students may not like the lack of individuality(个性) with a uniform, but some school dress code policies may offer them the opportunities to show their unique styles.

Uniforms today are also becoming trendier and can be seen in many areas of pop culture. Celebrities and fashion designers are using uniforms as inspiration for new looks which also appeal to students.

1.Teachers think that wearing school uniforms ________________.

A. is just a tradition that students should follow

B. makes students feel less pressure in study

C. helps students put more effort into their studies

D. makes students lose their independence and identity

2.The underlined part “it won’t break the bank” in Paragraph 3 probably means “________”.

A. a school uniform doesn’t cost a lot of money

B. a school uniform should be worn every day

C. parents will have to go to the bank many times

D. parents who work in a bank can afford the uniform

3.We can infer from the text that school uniforms _________.

A. are not popular with fashion designers

B. were not accepted by parents in the past

C. will be designed by students themselves

D. will be more fashionable in the future

4.The author’s attitude towards students’ wearing school uniforms is ___________.

A. negative B. supportive

C. doubtful D. unclear

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