题目
题型:不详难度:来源:
What happens after an earthquake? We send in rescue dogs. Why? Because they can smell people. They help rescuers to find living people. But dogs are big and they can’t get into small spaces. So now a new research project is using a smaller animal to save lives: the rat.
How does it work? First, the rat is trained to smell people. When this happens, the rat’s brain gives a signal(信号). This is sent to a small radio on its back and then the rescuers follow the radio signals. When rat’s brain activity jumps, the rescuers know that someone is alive. The rat has smelled that person.
Although there are already robots which can do this job, rats are better. Christian Linster at Cornell University, New York, says, “Robots’ noses don’t work well when there are other smells around. Rats are good at that. ” Rats can also see in the dark. They are cheaper and quicker to train than dogs, and unlike robots, they don’t need electricity!
The “rat project” is not finished, but Julie Ryan of International Rescue Corps in Scotland says, “It would be fantastic. A rat could get into spaces we couldn’t get to, and a rat would get out if it wasn’t safe. ” Perhaps for the first time in history, people will be happy to see a rat in a building, but only after an earthquake, of course.
小题1: In the world earthquake capitals, rats will become man’s best friends because they can ______.
A.take the place of man’s rescue jobs |
B.find the position of people alive who are trapped in buildings |
C.serve as food for people alive who are trapped in buildings |
D.get into small spaces |
A.the noise made by the rat |
B.the rat’s unusual behavior |
C.the signal sent by the radio on the rat’s back |
D.the smell given off by the person |
A.rats smell better than dogs |
B.dogs don’t need to be trained to smell people |
C.robots’ sense of smell can be affected by other smells around |
D.rats can see in the dark and they are smaller than robots |
A.they are more fantastic than other animals |
B.they are less expensive to train than dogs |
C.they don’t need electricity |
D.they are small and can get into small places |
答案
小题1:B
小题2:C
小题3:C
小题4:A
解析
试题分析:
小题1:B 推理题。根据文章第2段. So now a new research project is using a smaller animal to save lives: the rat.和第三段说明人们可以利用老鼠来找到那些被围困在地下的人,并把他们救出来。故B正确。
小题2:C 细节题。根据第三段1,2,行When this happens, the rat’s brain gives a signal(信号). This is sent to a small radio on its back and then the rescuers follow the radio signals.说明研究人员可以根据这些信号来辨别这个人是否是活着的。故C正确。
小题3:C 细节题。根据第四段第二行“Robots’ noses don’t work well when there are other smells around.说明机器人的嗅觉是人员被干扰,故C正确。
小题4:A 细节题。根据文章第二段第二行But dogs are big and they can’t get into small spaces.说明老鼠可以到更小的地方,故D是老鼠的优势;根据第四段第三行They are cheaper and quicker to train than dogs,说明B是优势。根据第四段最后一行they don’t need electricity!说明C也是老鼠的优势。A没有提及。故A不是老鼠的优势。
点评:文章介绍了用老鼠来寻找在地震中北困在地下的人的优势。本文集中考查细节题,要求考生在阅读的时候在关键的点上做好标志,以减少回读的次数,大大提高阅读的效率和速度。
核心考点
试题【Everybody hates rats(老鼠). But in the earthquake capitals of the world—Japan, Los】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
Glen, a teacher, realized this was a 13 moment about the importance of making people feel
14 . He asked his class to imagine they were about to 15 and to write a note “telling someone how and why you 16 him or her.”
Sandy, who had a 17 relationship with her mother, decided to write her mother. Her letter 18 “We’ve had some 19 times and I haven’t always been a very good 20 ,but I know I’m lucky to have you in my life. You’re the 21 person I’ve ever known, And even when I disagree with you, I never 22 you love me and want what’s best for me. Thanks for not 23 up on me”.
When her mom read the note, she cried and hugged Sandy 24 but said little.
The next morning, Sandy found a 25 on her mirror: “Dearest Sandy, I want you to know being your mother is ,by far, the most important thing in my life. 26 I got your note, I thought I had lost your love and 27 . I felt like such a failure. I intended to 28 it all last night. Your note saved my 29 .”
Be careful not to underestimate the 30 of expressed appreciation. It won’t always save a life, but it will always make someone’s life better.
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A.miss | B. hate | C. admire | D. appreciate |
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A. trust | B. doubt | C. consider | D. predict |
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Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated(展示)a small robotic wheelchair directed by a person’s thoughts.
In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand.He could even talk as he watched the vehicle and guided it with his thoughts.
“Our brain has billions of nerve cells.These send signals through the spinal cord(脊髓)to the muscles to give us the ability to move.But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles,” Tavella says.“Our system allows disabled people to communicate with external world and also to control devices.”
The researchers designed a special cap for the user.This head cover picks up the signals from the scalp(头皮)and sends them to a computer.The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path.They help the computer react to commands from the brain.
Prof.Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands.“The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices.One example is this wheelchair.”
He says his team has set two goals.One is testing with real patients, so as to prove that this is a technology they can benefit from.And the other is to guarantee that they can use the technology over long periods of time.
小题1:BCI is a technology that can .
A.help to update computer systems | B.link the human brain with computers |
C.help the disabled to recover | D.control a person"s thoughts |
A.By controlling his muscles. | B.By talking to the machine. |
C.By moving his hand. | D.By using his mind. |
A.make profits from them | B.prove the technology useful to them |
C.make them live longer | D.learn about their physical condition |
A.Switzerland, the BCI Research Center |
B.New Findings About How the Human Brain Works |
C.BCI Could Mean More Freedom for the Disabled |
D.Robotic Vehicles Could Help to Cure Brain Injuries |
In the first stage of our lives,we develop and grow, reaching toward the top of physical vitality(活力).
After we grow up,however, the body begins a process of gradually wearing out.
A new awareness of physical fitness may help lengthen our years of health and vitality,yet nothing we do will work to stop the unavoidable force of aging.
Most of the changes of aging take place deep inside the body.The lungs become less able to take in oxygen.Powerful muscles gradually lose their strength.The heart loses power and pumps less blood.Bones grow easier to break.
Finally, we meet a stress,a stress that is greater than our physical resistance.Often,it is only a minor accident or chance infection(a disease caused by virus),but this time,it brings life to an end.
In 1932,a classic experiment nearly doubled the lifetime of rats,simply by cutting back the calories in their diet The reason for the effect was then unknown.
Today, at the University of California at Berkley, Dr.Paul Seagle has also greatly lengthened the normal lifetime of rats.The result was achieved through a special protein limited diet,which had a great effect on the chemistry of the brain.Seagle showed that within the brain,specific chemicals control many of the signals that influence aging.By changing that chemical balance,the clock of aging can be reset.
For the first time, the mystery of why we age is being seriously challenged.Scientists in many fields are now making striking and far-reaching discoveries.
An average lifetime lasts 75 years,yet in each of us lies a potential for a longer life.If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
小题1:What does the underlined word “it” refer to?
A.Physical vitality. | B.Stress. | C.Aging. | D.Physical resistance. |
A.People gradually lose their muscle strength. |
B.Bones tend to break more easily. |
C.The heart loses power and pumps less blood. |
D.The lungs become unable to take in oxygen. |
A.human"s life pattern is predictable |
B.physical fitness can"t stop the force of aging |
C.human"s lifetime will last longer than 75 years |
D.all of the changes of aging take place deep inside the body |
A.By keeping their physical fitness. | B.By cutting the calories in their diet. |
C.By resetting their clock of aging. | D.By limiting the protein in their diet. |
A.Two Great Experiments |
B.The Mystery of Human Life |
C.The Breakthrough in the Study of Aging |
D.Ways to lengthen Human Life |
Three experts have described how a teenage girl was struck by lightning while using her phone in a large London park.The girl,aged 15,recovered,but a year later was still wheelchair-bound and found to be suffering complex physical and emotional problems.
The girl also had a perforate eardrum(打孔耳膜)on the side where she had been holding the mobile phone.She was having general recovery in Northwick Park Hospital,Middlesex.
Swinda Esprit,a senior house officer, said that while the brain and muscle damage was similar to that of many lightning victims—who can experience heart attacks on being struck—the ear problems were not.
She said that the damages were particularly relevant for people who might be involved in less serious lightning incidents,who might otherwise recover, but would never get their full hearing back if struck while on the phone.
“We were shocked by the damage,which is why we wanted to draw attention to it,”Dr Esprit said.“A year on and she still was suffering these difficult hearing.”
They added that three other cases had been reported in newspapers in China,South Korea,and Malaysia.In the Malaysian case,a sales executive was killed by lightning while talking on his phone during a thunderstorm near Kuala Lumpur.
“All these events resulted in death,”the doctors wrote.“This rare phenomenon is a public health issue,and education is necessary to stress the risk.”
The Australian Lightning Protection Standard recommends that metallic objects,including cordless or mobile phones,should not be carried outdoors during thunderstorms.However, “the United States National Weather Service says on its website that both are safe to use “because there is no direct path between you and the lightening”.
Paul Taylor, of “the Met Office"’,said the ear injuries were a consequence of mobile phones being metal,and not related to radio waves.
Mr. Taylor said that mobile phones should be treated as another piece of metal,similar to carrying coins or wearing rings,and people need to be warned against the possible danger.
小题1:What do we know about the teenage girl?
A.She was struck by lightning at schoo1. |
B.She completely recovered from being struck. |
C.She still suffered from mental problems. |
D.She had to press her ear all day. |
A.is more serious than that when one is not using a mobile phone |
B.can be healed quickly except for heart attacks |
C.is less serious because the victims can usually recover |
D.is mainly in the brain and muscle of the victims |
A.Because more people are faced with it. |
B.Because some deaths have been caused. |
C.Because lightning is harmful for the brain. |
D.Because a teenage girl got killed. |
A.both cordless and mobile phones are safe to use outside in lightning |
B.there is no direct connection between lightning and ear injuries at all |
C.opinions differ as to whether it is safe to use mobiles phones in lightning |
D.ear injuries are the result of carrying coins or wearing rings in lightning |
A.to draw attention to the risk of using mobile phones in lightening |
B.to focus on various damages done to lightning victims |
C.to tell us the news that a teenage girl was struck by lightning |
D.to stress the danger of making phone calls in lightning |
[1]Keeping a busy social life among lots of friends may keep people slimmer than spending hours on a treadmill, according to scientists. They say that socializing and meeting with friends helps boost levels of ‘brown fat’ in the boby which burns calories to generate heat.
[2]Living in a stimulating, social environment was found to reduce abdominal fat in mice by half over four weeks, even if they ate more. US researchers say that social stimulation can
by converting white fat into brown, White stores calories and makes us fatter, while brown burns energy to generate heat .Converting white fat into brown is difficult, as we all know, normally requiring long term exposure to cold conditions or activating part of the body’s nervous system
[3]However, scientists from Ohio State University now think that having a busy social life is an even more effective way of changing white fat into brown, The team came up with their theory by studying the effects of various living environments on mice. Those who lived alongside a greater number of mice and had more space and toys to stimulate them lost far more weight over the course of the study than their ‘couch potato’ ones.
[4]Study author Dr. Mattew During, whose team’s findings appear in journal Cell Metabolism said: I’m still amazed at the degree of fat loss that occurs. Explaining how new technology had threatened face-to-face socializing, he added: ‘It’s not just a sedentary lifestyle and high calorie foods, but an increasing lack of social engagement.’
[5]Co-author Dr. Lei Cao said: ‘Loneliness is a profound factor for cancer and death; it’s on par with cigarette smoking. Social engagement is very important’.
小题1:What’s the main idea of this passage? (no more than 10 words)
小题2:Fill in the blank in Paragraph 2 with proper words. (no more than 5 words)
小题3:What’s the purpose of the study of mice? (no more than 20 words)
小题4:How does socializing help make people slim? (no more than 15 words)
小题5:Translate the underlined sentence into Chinese.
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