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题型:阅读理解-阅读单选 难度:0.65 引用次数:269 题号:17508347

Scientists have successfully implanted and integrated human brain cells into newborn rats, creating a new way to study complex psychiatric disorders such as schizophrenia (精神分裂症), and perhaps eventually test treatments.

Scientists can assemble small sections of human brain tissue made from stem cells in a special container. But in such a container, “neurons(神经元) don’t grow to the size, to which a human neuron in an actual human brain would grow,” said Sergiu Pasca, the study’s lead author from Stanford University. To overcome such restrictions, researchers implanted the groupings of human brain cells, called organoids, into the brains of young rats.

Human neurons have also been implanted into adult rats before, but an animal’s brain stops developing at a certain age, limiting how well implanted cells can integrate. “By transplanting them at these early stages, we found that these organoids can grow relatively large and receive nutrients, and they can cover about a third of a rat’s brain,” said Pasca.

To test how well the human neurons integrated with the rat brains and bodies, air was blown out across the animals’ whiskers, which prompted electrical activity in the human neurons. That showed that external stimulation of the rat’s body was processed by the human brain tissue.

The scientists then conducted another test in the opposite order. They implanted human brain cells which could respond to blue light, and then trained the rats to expect a “reward” of water from a pipe when blue light shone on the neurons via a cable in the animals’ brain. After two weeks, they found pulsing the blue light sent the rats scrambling to the pipe.

The team has now used the technique to show that organoids developed from patients with Timothy syndrome grow more slowly and display less electrical activity than those from healthy people.

Tara Spires-Jones, a professor at the University of Edinburgh’s UK Dementia Research Institute, said the work “has the potential to advance what we know about psychiatric disorders.”

1. Why did scientists research on rats instead of the special container?
A.Because psychiatric disorders are too complex.
B.Because rats also suffer similar psychiatric illnesses.
C.Because it limits the growth of human brain neurons.
D.Because human brain neurons grow too quickly in it.
2. What can be inferred from Paragraph 3?
A.Rats’age has a significant influence on the research.
B.Human brain cells can’t be implanted into adult rats.
C.Rats’ brain won’t develop if they receive human neurons.
D.Human neurons can grow larger in adult rats’ brain than young rats’.
3. Why did the researchers carry out one more test?
A.To train rats to respond to external stimulations.
B.To show similarities between rats and human tissues.
C.To confirm human brain cells could grow well in rats’ brains.
D.To check whether signals could be sent back to rats’ body.
4. What is the significance of the research?
A.It can advance more experiments on rats.
B.It can further our study of psychiatric illnesses.
C.It can provide some useful experimental methods.
D.It can promote our knowledge of human brain cells.
【知识点】 科普知识 说明文

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阅读理解-七选五 | 适中 (0.65)
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【推荐1】I’m a hiker -“born to hike”, as my husband likes to joke. It does my heart and soul good to take a pack and head out on a trail (小路), especially when I’m alone and can let my mind wander where it will. The experience of hiking is unique, research suggests, conveying benefits beyond what you receive from typical exercise.     1    

Hiking keeps your mind sharper than many other forms of exercise. As a professional writer, although I’m busy with my work, I often spare some time to hike.     2    

    3     Exercise in general can be a good way to decrease stress. But what sets hiking apart from other forms of exercise is that hiking can happen almost anywhere and give you that dose of nature you need to stay happy.

Hiking can increase our creativity. I’m sure I’m not alone in finding that walks in nature let my mind wan der freely in creative directions.     4     Sometimes, ideas relevant to music come up from unconscious places when I’m not deliberately thinking.

Hiking helps strengthen a positive relationship with the natural world. Besides being good for us, hiking may also help the world around us. After all, if we can walk and cover longer distances, we could use cars less and reduce our carbon footprint.     5     It increases our connection to nature. Developing a positive relationship with the natural world can help us to care about its fate, making us more committed to conservation (保护) efforts.

A.Hiking helps to keep you calm and happy.
B.Hiking and writing have strong connections.
C.Beyond that, hiking benefits our planet indirectly.
D.It is not only good for our bodies, but also good for our moods, minds, and relationships.
E.In fact, I’ve written many of my songs while hiking on a trail.
F.This all goes to show that hiking may be one of the best ways to move your body.
G.It not just makes me feel good, but also keeps my brain in top shape.
2023-11-04更新 | 78次组卷
阅读理解-阅读单选 | 适中 (0.65)
文章大意:这是一篇说明文。文章主要说明了只有高智商不能导致成功,列举了情商和成功的相关研究,指出情商和智商同样重要,情商高更有可能成功。

【推荐2】Most students do an IQ test early in their school career. Even if they never see their results, they feel that IQ is what determines how well they are going to do in life. When they see other students doing better than them, they usually believe that those students have a higher IQ and that there is nothing they can do to change facts. However, new research into EQ suggests that success is not simply the result of a high IQ.

While your IQ tells you how intelligent you are, your EQ tells you how well you use your intelligence. Professor Salovey, who invented the term EQ, gives the following description. At work, it is IQ that gets you hired, but it is EQ that gets you promoted. Supported by his academic research, Professor Salovey suggests that when predicting someone’s future success, their character, as measured by EQ tests, might actually matter more than their IQ.

Professor Salovey may be correct. For example, have you ever wondered why some of the smartest students in your class, who you think deserve good grades, sometimes end up failing exams? Perhaps their failure is because of their low EQ. People are often mistaken in thinking that those with high IQs always have high EQs as well. This association can exist, but it is as possible for someone with a low IQ to have a high EQ or someone with a high IQ to have a low EQ.

It is generally believed that people with high EQs are open to new ideas and have positive attitudes towards life. They are also less likely to be troubled by problems. On the other hand, there is little doubt that people with low EQs often have problems getting on with other people and dealing with difficult situations; thus, they have a harder time surviving in life.

People generally believe that a person’s IQ is determined by birth. However, most social scientists agree that EQ has a lot to do with education. Some are trying to study the possibility to improving a person’s EQ, especially in terms of “people skills”, such as understanding and communication.

Professor Mayer, recently announced the results of a study on senior high school students. When normal students were introduced to students with disabilities, they found that, afterwards, the normal students were more willing to help people with difficulties. They also showed a better understanding of the disabled students’ feeling compared to students who had not been involved in the study. There was also an obvious change in the disabled students’ attitudes. They became more positive about life and more willing to try new things.

The results of studies such as these show that EQ is as important, if not more important than IQ. To get ahead in the world and lead a happy successful life means getting on with other people and being able to understand and react to situations in the best way possible. This requires a high EQ — the higher the better. And the fact that it might be possible to raise EQs means that schools need to make sure that their students are receiving the education they really need and know that their futures are not entirely determined by their IQs.

1. What does the first paragraph want to convey?
A.Only a high IQ can’t result in success.
B.Most students never see their IQ test results.
C.Students can’t change their IQs with education.
D.IQ determines how well students are going to do in life.
2. Why do some smart students end up failing exams according to Prof. Salovey?
A.Because they probably have a lower IQ.B.Because they probably have a lower EQ.
C.Because they are often mistaken in thinking.D.Because they are likely to be troubled by problems.
3. According to the text, which statement is true?
A.People’s character might not matter more than their IQ.
B.“People skills” are of little importance on one’s road to success.
C.People with high EQs usually have negative attitude towards life.
D.Schools should reconsider if their students are receiving the education they need.
4. What would be the best title for the text?
A.Practice makes perfect.B.IQ is important for us.
C.Success comes with a high EQ.D.Success owes to wisdom.
2022-07-10更新 | 93次组卷
阅读理解-七选五 | 适中 (0.65)
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【推荐3】A food allergy (过敏) is a medical condition that occurs when the body’s protection system perceives certain foods as a threat and responds to them with an allergic reaction.

    1    . That’s because they account for around 90 per cent of food allergies in the country. And they are the ones most likely to cause a severe reaction. This group consists of eggs, milk, peanuts, fish, tree nuts and wheat.

Food allergies are often confused with food intolerance. But intolerance is a less serious condition that does not involve a response from the immune system.     2    . If you experience an extreme reaction, seek medical help immediately.

Symptoms (症状) of a food allergy. Symptoms can range from mild to severe. And they may differ each time a specific allergen appears. Symptoms can include: a skin rash or hives, swelling of the face or lips, or feeling lightheaded or dizzy.     3    . That can send the body into shock or make it difficult to breathe.

Treating a food allergy. For minor reactions, you can take some medicine. For severe reactions, however, turn to doctors for help.

    4    . The only sure way to prevent an allergic reaction to food is to carefully avoid the allergens. This can be a difficult process. That requires patients to carefully study food labels to ensure the food is safe for them.     5    . So it’s necessary to inform family or friends of the food that can cause a food allergy.

A.Avoiding harm from allergy
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C.Not everyone knows what a food allergy is
D.Many people do not understand the severity of the issue
E.The best way to handle a food allergy is to avoid such foods
F.For some people, certain allergens can bring a severe reaction
G.Certain foods are considered priority allergens by Health Canada
2023-06-18更新 | 72次组卷
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