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题型:阅读理解-阅读单选 难度:0.4 引用次数:267 题号:11850084

Maybe you’re depressed because you didn’t sleep well. Or you feel stuck when you read an email with some bad news that prevented your enthusiastic imagination. Whatever the case may be, you tell yourself working now is in vain (徒劳的), because you couldn’t possibly come up with anything inventive in this mood.

Several studies in psychology have shown that negative emotions narrow our vision and limit our thinking. However, positive emotions can improve creativity because they broaden our way of thinking by encouraging us to try new things or look at situations differently.

Creativity is the ability to produce and carry out both new and useful ideas. Creativity can result from a person’s own creative ideas and observations, or it can appear as a response to a direct assignment or problem as well.

Both positive and negative moods can lead to two different kinds of creativity that benefit different tasks. Research shows that the key factor influencing our creativity is not our mood itself, but the strength of our feelings and the motivation (动机) behind our work. For example, anger or anxiety can help us to focus our attention on producing effective results. Great excitement or joy, on the other hand, can encourage an instant at which the solution to a problem becomes clear all of a sudden. In fact, one study even finds that while we’re 20 percent more likely to have creative abilities to understand mixed situations when we’re feeling good, people in a negative mood perform better when the quality of solutions—not quantity—matters most.

But of course, we are rarely entirely happy or entirely sad. More often, we experience mixed emotions. In psychology, these strong emotions whether they are positive or negative, lead to greater creative actions.

It comes as no surprise then that highly creative people tend to be very familiar with their emotions. They report experiencing very strong emotions more frequently than less creative people and are more willing to experience those emotions.

1. What is the author’s purpose in writing the first paragraph?
A.To expect us to be creative.
B.To show the importance of creativity.
C.To tell us negative emotions exist everywhere.
D.To clarify how moods influence your creativity.
2. What is the attitude of the author towards negative emotions?
A.Supportive.B.Critical.C.Doubtful.D.Objective.
3. What can be learned in the passage?
A.We should always try to keep ourselves in good mood.
B.People feel either very happy or very sad most of the time.
C.Strong emotions play an important role in creativity.
D.Creativity only results from creative ideas and observations.
4. According to the passage, what should you do to get more creative?
A.Avoid negative moods totally.
B.Face up to inner feelings positively.
C.Try out new things cautiously.
D.Understand mixed situations clearly.

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【推荐1】Scientists have found living organisms trapped in crystals(晶体) that could be 50,000 years old.

The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. Penelope Boston, who leads the Astrobiology Institute at NASA, the space agency of the United States, says the ancient microbes(微生物) were able to live by eating minerals such as iron.

She spoke about the discovery recently at a meeting of the American Association for the Advancement of Science. If the findings are confirmed, they will show how microbes can survive in extreme conditions. Forty different kinds of microbes and some viruses were found in the underground area. The genetic structures of these organisms are 10 percent different from those of their nearest relatives.

The caves in Naica are 800 kilometers deep. They were once used for mining lead. Before the miners began working in the caves, the area was separated from the surface and the outside world. Some of the caves are as big as the large religious centers built during Europe's Middle Ages. There are crystals covering the walls. The caves are so hot that scientists must wear special clothing to keep cool. The clothing keeps the crystals safe from human germs(病菌)or other damage. Boston said the researchers could only work for about 20 minutes at a time before they had to go to a room that was 38 degrees Celsius to cool down.

NASA officials would not let Boston share her findings with scientific experts before last week's announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist with the University of South Florida, said she believed them. "Why are we surprised?" Noonan asked. "As a biologist, I would say life on Earth is extremely tough and extremely colorful."

Boston is also studying microbes commonly found inside caves in other countries, such as Ukraine and the United States. These microbes appear to be impossible to kill. Boston said they show how difficult life on Earth can be.

1. The existence of the ancient microbes relies on _______.
A.surrounding insectsB.diverse plants
C.eating mineralsD.absorbing air
2. What can we infer about the caves in Naica from the passage?
A.The walls are covered by crystals.
B.The temperature in the caves is quite low.
C.The caves have been explored since they were formed.
D.The environment in the caves is difficult to adapt to.
3. What is the biologist Norine Noonan’s attitude towards the findings?
A.CriticalB.Positive.
C.Doubtful.D.Indifferent.
4. What’s the main idea of the passage?
A.Living organisms bring hope to scientific research.
B.Scientists Discover 50,000-year-old “super life” in Mexico.
C.Microbes show great power to survive in terrible conditions.
D.Caves provide living environment for living organisms.
2017-06-11更新 | 85次组卷
阅读理解-阅读单选(约350词) | 较难 (0.4)
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【推荐2】Genome-edited(基因编辑) food made with CRISPR-Cas9 technology is being sold on the open market for the first time. Since September, the Sicilian Rouge tomatoes, which are genetically edited to contain high amounts of Y-aminobutyric acid(γ-氨基丁酸)(GABA), have been sold direct to consumers in Japan by Tokyo-based Sanatech Seed. The company claims oral intake of GABA can help support lower blood pressure and promote relaxation.

“In Japan, dietary supplements and foods enriched for GABA are popular among the public, ”says Hiroshi Ezura, chief technology officer at Sanatech. “GABA is a famous health-promoting compound in Japan. It’s like vitamin C,” he says. More than 400 GABA-enriched food and beverage products, such as chocolates, are already on the Japanese market. “That’s why we chose this as our first target for our genome editing technology,” he says.

Sanatech, a startup from the University of Tsukuba, first tested the appetite of consumers in Japan for the genome-edited fruit in May 2021 when it sent free seedling CRISPR-edited tomato plants to about 4,200 home gardeners who had requested them. Encouraged by the positive demand, the company started direct internet sales of fresh tomatoes in September and a month later took orders for seedlings for next growing season. Japan’s regulators approved the tomato in December 2020.

Since its beginning a decade ago, CR1SPR-Cas9 genome editing has become a tool of choice for plant bioengineers. Researchers have successfully used it to develop non-browning mushrooms, drought-tolerant soybeans and a host of other creative traits in plants. Many have received a green light from US regulators. But before Sanatech’s tomato, no CRISPR-edited food crops were known to have been commercialized.

Consumers may find food ingredients made with some of the older DNA editing techniques. Indeed, Calyxt in 2019 commercialized a TALEN-edited soybean oil that is free of trans fats. So it was only a matter of time before a CRISPR-edited crop reached palates.

1. Why was GABA-enriched food chosen for genome editing technology?
A.It is easy to edit its genome.B.It is popular among the public.
C.It can replace vitamin C.D.It can cure people of diseases.
2. What does the author want to say about the seedlings in Para. 3?
A.They are in great demand.B.They are very expensive.
C.They are still under doubt.D.They are free up to now.
3. Why were non-browning mushrooms mentioned in the 4th paragraph?
A.To prove TALEN-genome editing’s wide use.
B.To prove CRISPR-Cas9 genome editing’s popularity.
C.To prove CRISPR-edited crops’ creative traits.
D.To prove TALEN-edited soybean oil’s advantages.
4. Which of the following can be the best title for the text?
A.TALEN-edited Tomatoes Are Supposed to Come Out
B.Which Are More Nutrient, TALEN-edited or CRISPR-edited Tomatoes?
C.Why GABA Has Such an Appeal at the Present Time?
D.CRISPR-edited Tomatoes Are Supposed to Make You Relaxed
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【推荐3】How does our brain know that “this” follows “that”? The sequencing of events that takes place in our head — with one thing coming after another — may have something to do with so-called time cells recently discovered in the human hippocampus (海马结构).

A team led by Leila Reddy, a neuroscience researcher at the French National Center for Scientific Research, sought to understand how human neurons (神经元) in the hippocampus represent time information during a series of learning steps to uncover the functioning of time cells in the brain.

In the first experiment, the study participants were firstly presented with a sequence of five to seven pictures of different people or scenes in a predetermined order that was repeated multiple times. The researchers discovered that, over the course of 60 repetitions of the entire sequence, all of the time-sensitive neurons were stimulated at specific moments in intervals between quizzes, no matter which image was shown.

A second experiment followed the same design, except that, after the sequence was repeated for a fixed number of times, a black screen was shown for 10 seconds, a gap interval that was intended to act as a distraction. The participants were quizzed about the order of the images in the sequence while the electrical activity from individual cells in their brain was recorded. Some neurons were fired at one moment, corresponding to a particular image. Others did so at another moment for a different image. Time cells corresponding to a specific image still switched on during the 10-second gaps in which no image was shown. These gaps appeared to help subjects remember more pictures and their correct order. During the gap periods, about 27 percent of the time cells were activated.

“The activity of these cells is present throughout the trial, providing a timestamp for an event.” Yet the fact that these cells also represent the content of our memory (the “what” as well as the “when”) makes things more complex, a co-researcher Matthew Self explains. “We don’t fully understand how the memory is encoded,” he says, “but the activity pattern across the hippocampus appears to provide us with both the timestamp and the contents of the experience at the same time.”

1. Why did Reddy’s team study time cells in the human hippocampus?
A.To reveal how time cells work.B.To figure out the function of neurons.
C.To understand the structure of time cells.D.To evaluate the accuracy of time information.
2. What does the underlined word “fired” mean in Paragraph 4?
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3. What can we learn from the experiments?
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B.All neurons were active throughout the intervals.
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D.Time cells switched off with no images being presented.
4. What do we know about the activity pattern across the hippocampus?
A.It gives us an idea of how memories are encoded.
B.It can give us the order and the contents of memory.
C.It has the potential to make the brain more complex.
D.It may present not only the event order but also the time period.
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