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题型:阅读理解-阅读单选 难度:0.65 引用次数:78 题号:12475139

Forget spending the whole night studying for the exam. There’s another way to cram (突击式学习) for tests. New research by scientists at Northwestern University in Chicago shows people can actually learn while they’re asleep.

In the new study, published in the journal Nature Neuroscience, participants were given diagrams that showed them how to play two simple piano melodies, each 12 notes long. They spent an equal amount of time practicing playing each tune, and then took a 90-minute nap (小睡). While they slept, one of the melodies was quietly played on repeat for four minutes. As a result, upon awakening, the participants could accurately play the melody 4 percent more often than the melody that was not played while they slept, considering it resulted from just four minutes of “sleep-learning.”

“The re-activation (重新激活) process in the experiment is thought to affect a naturally occurring memory consolidation (巩固) process that normally happens over months (possibly years),” said Paul Reber, a psychologist at Northwestern and co-author of the study. So, besides piano songs, what kinds of information can you “cram” while asleep?

Clearly, resting your textbook near your dreaming head won’t do any good. “As long as the memory is tied to a specific type of sound, it looks like the sound can re-activate and strengthen the previously learned information,” Reber said. “It is possible that this effect would help with strengthening memories from a lecture and that it could even help speed up second-language learning.”

In other words, if you’re learning a foreign language, it may help to put on recordings of the language while you sleep. If you need to memorize information presented in a classroom lecture, it might also help to record the lecture and play it quietly at night.

1. The first paragraph serves as a(n) _____.
A.introductionB.backgroundC.commentD.conclusion
2. In the new study, _____.
A.the participants had learned to write the piano melodies
B.the participants played each melody for about 90 minutes
C.the two melodies were basically of the same level of difficulty
D.the two melodies were played in turn while the participants slept
3. What’s the author’s aim in giving the example of the study?
A.To tell us the importance of sleep.
B.To prove sleep-learning is possible.
C.To recommend a way for us to learn music.
D.To show that music can improve our memory.
4. What did Paul Reber advise us to do when sleeping?
A.Study music carefully.B.Record the sound of sleeping.
C.Put a book beside our head.D.Play recordings quietly.

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【推荐1】What color is a tennis ball? Ask your classmates, and they might give you some surprising answers.

US magazine The Atlantic recently asked 30,000 people this question. Among them, 52 percent said tennis balls are green, 42 percent said they are yellow, and 6 percent went with other colors. According to the International Tennis Federation, tennis balls are yellow.     1    

Scientists call this color constancy (色彩恒常性). For example, we know that China's flag is red. When we see it during sunset or under purple light, we still know that it is red, even if it looks like a different color.     2     Even if the object is seen in different kinds of light later, our brain can still tell its true color.

    3     It appears to be a combination of yellow, a ''warm'' color and green, a ''cool'' color.

According to The Atlantic, when our brains try to figure out what color the ball is, some people ignore ''cool'' colors, such as green, blue and purple. So they see the ball as being yellow.    4     They see the ball as being green.

    5     In 2015, a girl posted a picture of a dress online. Some people believed the dress was black and blue—but others thought it was gold and white. They had different opinions based on whether they ignored ''cold'' or ''warm'' colors.

A.It is not just tennis balls that have such a confusing color.
B.But others ignore ''warm'' colors, such as red, yellow and orange.
C.However, the color of a tennis ball is not as pure as the flag.
D.It is difficult for some people to distinguish yellow from green.
E.So why did so many people say that they're green?
F.Certain parts of our brain are in charge of recognizing colors.
G.When we first see an object in natural light, our brains recognize its true color.
2020-03-24更新 | 121次组卷
阅读理解-阅读单选(约440词) | 适中 (0.65)
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文章大意:这是一篇说明文。通过研究发现,快乐是能被闻出来的。

【推荐2】Does happiness have a scent?

When someone is happy, can you smell it?

You can usually tell when someone is happy based on seeing them smile, heating them laugh or perhaps from receiving a big hug. But can you also smell their happiness? Surprising new research suggests that happiness does indeed have a scent, and that the experience of happiness can be transmitted through smell, reports Phys.org.

For the study, 12 young men were shown videos meant to bring about a variety of emotions while researchers gathered sweat samples from them. All of the men were healthy and none of them were drug users or smokers, and all were asked to abstain from drinking or eating smelly foods during the study period.

Those sweat samples were then given to 36 equally healthy young women to smell, while researchers monitored their reactions. Only women were selected to smell the samples, apparently because previous research has shown that women have a better sense of smell than men and are also more sensitive to emotional signaling—though it's unclear why only men were chosen to produce the scents.

Researchers found that the behavior of the women after smelling the scents--particularly their facial expressions--indicated a relationship between the emotional states of the men who produced the sweat and the women who sniffed them.

"Human sweat produced when a person is happy brings about a state similar to happiness in somebody who breathes this smell," said study co-author Gun Semin, a professor at Koc University in Turkey.

This is a fascinating finding because it not only means that happiness does have a scent, but that the scent is capable of transmitting the emotion to others. The study also found that other emotions, such as fear, seem to carry a scent too. This ensures previous research suggesting that some negative emotions have a smell, but it is the first time this has proved to be true of positive feelings.

Researchers have yet to isolate(分离) exactly what the chemical compound for the happiness smell is, but you might imagine what the potential applications for such a finding could be. Happiness perfumes, for instance, could be invented. Scent therapies   (香味疗法) could also be developed to help people through depression or anxiety.

Perhaps the most surprising result of the study, however, is our broadened understanding of how emotions get communicated, and also how our own emotions are potentially managed through our social context and the emotional states of those around us.

1. What is the main finding of the new research?
A.Men produce more sweats.
B.Negative emotions have a smell.
C.Pleasant feelings can be smelt out.
D.Women have a better sense of smell.
2. The underlined part "abstain from" in Paragraph 3 probably means _______.
A.avoidB.practice
C.continueD.try
3. What is the application value of the new research?
A.Perfumes could help people understand each other.
B.Some smells could be developed to better our mood.
C.Perfumes could be produced to cure physical diseases.
D.Some smells could be created to improve our appearance.
4. We can learn from the last paragraph that _______.
A.happiness comes from a scent of sweat
B.positive energy can deepen understanding
C.people need more emotional communication
D.social surroundings can influence our emotions
2016-11-26更新 | 1092次组卷
阅读理解-阅读单选(约340词) | 适中 (0.65)

【推荐3】Why elephants rarely get cancer is a mystery that has confused scientists for decades. A study led by researchers at Huntsman Cancer Institute(HCI), at the University of Utah and Arizona State University may have found the answer.

According to the results, elephants have 38 additional modified copies of a gene that encodes p53, a well-defined tumor suppressor(肿瘤抑制基因), as compared to humans, who have only two. Further, elephants may have a more powerful mechanism for killing damaged cells that are at risk for becoming cancerous. In isolated elephant cells, this activity is doubled compared to healthy human cells, and five times that of cells from patients with Li-Fraumeni Syndrome, who have only one working copy of p53 and more than a 90 percent lifetime cancer risk in children and adults. The results suggest extra p53 could explain elephants’ increased resistance to cancer.

"Nature has already figured out how to prevent cancer. It’s up to us to learn how different animals overcome the problem so we can adapt those strategies to prevent cancer in people,"says co-senior author Joshua Schiffman, M.D., pediatric oncologist(儿科肿瘤医生) at Huntsman Cancer Institute, University of Utah School of Medicine.

But Prof Mel Greaves, from the Institute of Cancer Research in London, says we should focus on why humans have such high levels of cancer. He pointed to the rise of unhealthy, cancer-causing behaviours, such as obesity and sunbathing. "You’ve never seen an elephant smoke!" he added.

According to Schiffman, elephants have long been considered a walking problem. Because they have 100 times as many cells as people, they should be 100 times more likely to have a cell slip into a cancerous state and cause the disease over their long life span of 50 to 70 years. And yet analysis of a large database of elephant deaths estimates a cancer death rate of less than 5 percent compared to 11 to 25 percent in people.

1. Why are elephants less likely to get cancer than humans?
A.Elephants are bigger than humans.
B.Elephants have more p53 genes than humans.
C.Elephants are not as clever as humans.
D.Elephants eat more than humans.
2. What can we learn from the text?
A.More p53 genes contribute to resisting cancer.
B.Elephants have less damaged cells in their bodies.
C.A healthy human has only one working copy of p53.
D.Patients with Li-Fraumeni Syndrome must get cancer in their lifetime.
3. What’s Prof Mel Greaves’ attitude towards the discovery?
A.Doubtful.B.Neutral.
C.Critical.D.Favorable.
4. What can we infer from the last paragraph?
A.Elephants have longer life than people.
B.There is no chance that elephants die from cancer.
C.The rate of elephants dying from cancer is increasing.
D.It was thought that elephants could get cancer more easily.
2018-05-18更新 | 44次组卷
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