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题型:阅读理解-阅读单选 难度:0.65 引用次数:161 题号:5694906

As trees across the northern areas turn gold and deep red, you can find autumn colors in parks and woodlands, in the cities, countryside, and mountains. People are wondering what these colors are for. For years, scientists have worked to understand the changes that happen to trees in the autumn. Up to now there have been different explanations for why natural selection makes autumn colors so widespread.

Dr. Hamilton from Oxford University proposed that bright autumn leaves contained a message: they warn insects to leave them alone. In autumn, insects choose trees where they will lay eggs. When the larvae(幼虫)come out the next spring, they feed on the trees, often with a result of destruction of the trees. Dr. Hamilton suggested that trees could ward off these insects with poisons. They could have strong defenses by letting egg-laying insects know what was in store for their eggs.

Dr. Hamilton and students turned the theory into a mathematical model, which showed that warning signals could indeed drive the evolution(进化)of bright leaves. It was a first attempt to see what was out there.

A research team from the University of Wisconsin gave a quite different explanation. “If you are up here in Wisconsin, by the time leaves change, all the insects that feed on leaves are gone.” Dr. Hoch said. He believed that autumn colors served mainly as protection.

According to Dr. Hoch and his team, autumn colors might be able to protect the leaves from sun damage or frost(冰冻)injury—in other words, they actually act as a sunscreen to avoid the destruction to the leaves. Besides, autumn colors might protect the leaves from water loss. If the cells in the leaves become dry, the connections between the cells will be weakened and leaves will break off.

Although there are different explanations about autumn colors, it has really given them a deeper concern for this time of year. “People sometimes say that science makes the world less interesting by just explaining things away,” one famous biologist said. “But with autumn leaves, the more you know about them, the more amazed you are.”

1. According to Dr. Hamilton, there is a connection between________.
A.the size of leaves and the survival of insects
B.the size of leaves and the behavior of insects
C.the size of leaves and the quality of insects
D.the size of leaves and the number of insects
2. Dr. Hoch and his team give the explanation that_________.
A.Climate has an influence on the color of the leaves
B.Sun damage and frost injury drive the insects away
C.the color of autumn leaves has a protective function
D.Autumn colors bring great destruction to the leaves
3. The underlined phrase “ward off” in Paragraph 2 probably means_______.
A.catch
B.attract
C.ignore
D.prevent
4. Which of the following can be the best title for the passage?
A.The evolution of colorful leaves
B.The secret to autumn leaves’ changes
C.The charm autumn colors
D.The role of leaves’ being protection
2018·山西运城·一模 查看更多[2]

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【推荐1】A scientist working at her lab bench and a six-old baby playing with his food might seem to have little in common. After all, the scientist is engaged in serious research to uncover (揭露)the very nature of the physical world, and the baby is, well, just playing … right? Perhaps, but some developmental psychologists (心理学家) have argued that this “play” is more like a scientific investigation(调查研究)than one might think.

Take a closer look at the baby playing at the table. Each time the bowl of rice is pushed over the table edge, it falls in the ground — and, in the process, it brings out important evidence about how physical objects interact (相互作用); bowls of rice do not float in mid-air, but require support to remain stable. It is likely that babies are not born knowing the basic fact of the universe; nor are they ever clearly taught it. Instead, babies may form an understanding of object support through repeated experiments and then build on this knowledge to learn even more about how objects interact. Though their ranges and tools differ, the baby’s investigation and the scientist’s experiment appear to share the same aim (to learn about the natural world), overall approach (gathering direct evidence from the world), and logic (are my observations what I expected?).

Some psychologists suggest that young children learn about more than just the physical world in this way — that they investigate human psychology and the rules of language using similar means. For example, it may only be through repeated experiments, evidence gathering, and finally overturning (使翻转)a theory, that a baby will come to accept the idea that other people can have different views and desires from what he or she has, for example, unlike the child, Mommy actually doesn’t like Dove chocolate.

Viewing childhood development as a scientific investigation throws light on how children learn, but it also offers an inspiring look at science and scientists. Why do young children and scientists seem to be so much alike? Psychologists have suggested that science as an effort — the desire to explore, explain, and understand our world — is simply something that comes from our babyhood(婴儿期).Perhaps evolution (进化) provided human babies with curiosity and a natural drive to explain their worlds, and adult scientists simply make use of the same drive that served them as children. The same cognitive (认知的) systems that make young children feel good about figuring something out may have been adopted by adult scientists. As some psychologists put it, “It is not that children are little scientists but that scientists are big children.”

1. According to some developmental psychologists, _____.
A.a baby’s play is nothing more than a game
B.scientific research into babies’ games is possible
C.the nature of babies’ play has been thoroughly investigated
D.a baby’s play is somehow similar to a scientist’s experiment
2. We learn from Paragraph 2 that____.
A.scientists and babies seem to observe the world differently
B.scientists and babies often interact with each other
C.babies are born with the knowledge of object support
D.babies seem to collect evidence just as scientists do
3. Children may learn the rules of language by ____.
A.exploring the physical world
B.investigating human psychology
C.repeating their own experiments
D.observing their parents’ behaviors
4. What is the author’s tone when he discusses the connection between scientists’ research and babies’ play?
A.Convincing.B.Confused.
C.Confidence.D.Cautious.
2018-11-13更新 | 60次组卷
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【推荐2】Some people say they “never forget a face.” But what does that saying mean? Is there really no limit to the number of faces a person can remember? A new study from a group of researchers at the University of York in England has found that, on average, people can remember as many as 5,000 faces. They published their findings on facial recognition this month in the Proceedings of The Royal Society B, Biological Sciences.

Rob Jenkins works in the psychology department at the University of York. He said the researchers’ study centered on “the number of faces people actually know”. The study suggests our facial recognition abilities help us to deal with the many different faces we see on the screens, as well as those we know, like family and friends.

For the human study, people spent one hour writing down as many faces from their personal lives as possible. Some examples may include people they went to school with, people they work with and family members. Then, they wrote down famous faces they know, such as actors, politicians and other public people.

The results showed that the participants knew between 1,000 and 10,000 faces. Jenkins said one explanation may be that some people have a natural ability for remembering faces. “There are differences in how much attention people pay to faces and how well they process the information,” he said. Jenkins also said it could be because of different social environments. Some people may have grown up in more populated places. So, they may have had more social contact throughout their lives.

The people in the study included 25 men and women students from two universities. They were between 18 and 61 years old. Researchers think age may be an interesting area for further research. Jenkins said it is possible that we gather more faces throughout our lifetime. But, he added, there also may be an age at which we start to find it harder to remember all of those faces.

1. What was the new study mainly about?
A.How long people can remember faces.
B.When people will forget faces.
C.Why people can deal with different faces.
D.How many faces people can know.
2. On average, how many faces can a man remember according to the study?
A.About 5,000.B.No more than 1,000.
C.Fewer than 25.D.Around 10,000.
3. What do we know about the participants in the study?
A.They are good at recognizing faces.
B.They remember more famous people.
C.They have different social backgrounds.
D.They try their best to avoid social contact.
4. What can we learn about the last paragraph?
A.We are sure to gather more faces as we age.
B.The future research may focus more on age.
C.The participants in the study are in their youth.
D.It may be harder to remember faces of different ages.
5. What did Jenkins think would affect people’s ability to remember faces?
A.Attention.B.Personal lives.C.Age.D.Sex.
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阅读理解-阅读单选(约340词) | 适中 (0.65)
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【推荐3】“Although we live in an era where everything seems to be available immediately, our study suggests that today’s kids can delay gratification longer than children in the 1960s and 1980s,”said University of Minnesota psychologist Stephanie M. Carlson. “This finding stands in great contrast with the assumption by adults that today’s children have less self-control than previous generations.”

The original marshmallow (棉花糖) test conducted by researchers at Stanford University involved a series of experiments in which children aged between 3 and 5 years were offered one treat that they could eat immediately or a larger treat if they waited. Researchers then left the room to see how long the children would wait and watched from behind a one-way mirror.

Interestingly, today’s adults thought that children nowadays would be more impulsive and less able to wait, Carlson found. “Our findings serve as an example of how our beliefs can be wrong and how it’s important to do research,” said co-author Yuichi Shoda, PhD at the University of Washington.

The researchers offered several possible explanations for why children in the 2000s waited longer than those in prior decades. They noted a statistically significant increase in IQ scores in the last several decades. Another explanation may be society’s increased focus on the importance of early education, according to Carlson. The primary objective of preschool changed from largely custodial care (监护) to school readiness in the 1980s. Parenting also has changed in ways that help promote the development of executive function, such as being more supportive of children’s self-control, the researchers noted.

Walter Mischel of Columbia University, who co-authored this paper, noted that “while the results indicate that the children’s ability to delay is not weakened on the marshmallow test, the findings do not speak to their willingness to delay gratification when faced with the many temptations now available in everyday life.”

1. What is the adults’ assumption about today’s children?
A.They are not easy to please.
B.They are less able to control themselves.
C.They don’t like things that are easy to get.
D.They have different personalities from previous generations.
2. What does the underlined word “impulsive” in Paragraph 3 mean?
A.productiveB.attentive
C.clear-mindedD.hot-headed
3. What did the researchers find about children in the 2000s?
A.They are more prepared to go to school.
B.They are not as clever as previous generations.
C.They are taught self-control by their teachers.
D.They have better education than previous generations.
4. What does the author want to tell readers in the last paragraph?
A.Most children nowadays can’t resist the temptations of everyday life.
B.Children did not willingly choose to delay gratification in the marshmallow test.
C.The marshmallow test can’t accurately measure children’s ability to delay gratification.
D.Children’s ability to delay gratification is weakened because there are many temptations.
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