试题详情
阅读理解-阅读单选 适中0.65 引用3 组卷10

Believe it or not, the size of the human brain has become smaller over the past 20,000 years. Scientists argue over whether this means we are becoming more or less intelligent as a species.

“I’d call that major downsizing in an evolutionary eye blink (眨眼),” John Hawks told Discover magazine.

Why is the brain becoming smaller?

There are different theories to explain it. One is that tens of thousands of years ago, to survive in cold and dangerous conditions, humans needed a stronger and larger body and therefore, a larger head. Also they had to chew the tough meat of rabbits, foxes and horses. As conditions improved, the brain stopped growing, according to supporters of this theory.

Another theory comes from a recent study by David Geary and Drew Bailey. They found that brain size decreased as population density (密度) increased.

“As complex societies appeared, the brain became smaller because people did not have to be that smart to stay alive,” Geary told AFP(法新社).

But smaller brain size does not necessarily mean that modern humans are less smart than their ancestors. “Modern humans simply developed different, more complex forms of intelligence,” said Brian Hare.

Hare’s studies focus on two types of great apes: chimpanzees and bonobos. Both are much like humans, but are physically quite different from one another. The bonobo has a smaller brain than the chimpanzee, and is also much less aggressive and more tolerant.

“When it comes to working out a problem,” Hare said, “chimpanzees are much less likely to accomplish it if it involves working together. Not so with bonobos.”

“The smaller brain in modern humans may be evidence that we can cooperate,” Hare told the US National Public Radio.

【小题1】Which of the following words can be used to replace the underlined word in Paragraph 2?
A.Speed.B.Increase.C.Decline.D.Change.
【小题2】We can learn from the passage that ________.
A.the size of human brain has something to do with many factors
B.the brain size increases because of the increase of population density
C.the abilities of bonobos and chimpanzees are almost the same
D.modern humans can certainly do teamwork better than other species
【小题3】According to Brian Hare, _________.
A.bonobos are much likely to cooperate better than chimpanzees
B.chimpanzees tend to work well with others
C.modern humans are less smart than their ancestors
D.small brains are certainly connected with intelligent beings
【小题4】Which of following is probably the best title of the passage?
A.Bonobos or Chimpanzees—Which Is Smarter?
B.Smaller Brain—Less Intelligent?
C.Human Beings or Animals—Who Is More Intelligent?
D.Human Brains?
22-23高一下·全国·单元测试
知识点:科普知识 说明文 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!
类题推荐

Indeed loneliness is now widely recognized as a major public health problem. What is perhaps less obvious is one answer to the problem: the healing power of poetry to make us feel more connected to others.

Here things get personal. I first got involved in how poetry can support our emotional wellbeing after I wrole a memoir, Black Rainbow: Hone Words Healed Me—My Journey Through Depression, in 2014 about how poetry helped me through two serious periods of depression. Since then, I’ve been running Healing Words poetry sessions for mental health charities and prisons, and have discovered first-hand the lovely feeling of companionship which poetry can bring.

Poetry lets us connect with other people who have experienced similar emotions. We’re not alone in our despair or delight. When we have a poem by our side, whether tucked into a bag or on a bedside table, it feels like we’re being accompanied by a friend: an authorial arm is wrapped around our shoulders.

I remember one woman starting to cry as she read Derek Walcott’s poem “Love After Love” during a workshop held at my local hospital in West London. Fighting through tears, she eventually said, “I feel understood.” Everyone in the room knew exactly what she meant.

She had, in Walcott’s phrase, struggled to “love again the stranger who was yourself”. The poet’s invitation to “Sit. Feast on your life” was the comfort she needed, in a language which spoke to her, to imagine loving herself in a way she had always found hard. Poetry had worked its magic, unlocking a feeling of inner connection, and in turn a connection to all of us sitting in the workshop.

Given my own experience, I think having a poem to keep us company can help us all feel a greater sense of belonging.

【小题1】What does the author suggest doing to fight against loneliness?
A.Researching the problem.B.Appreciating poetry.
C.Strengthening dignity.D.Connecting with others.
【小题2】How does having a poem at hand make you feel according to the author?
A.Socially accepted.B.Literarily knowledgeable.
C.Financially admired.D.Emotionally comfortable.
【小题3】Why did the woman start to cry in the workshop?
A.Because the poem touched her soul.
B.Because she was forced to read the poem.
C.Because she struggled to understand others.
D.Because she failed to work out the poem’s magic.
【小题4】What does the author mainly want to tell us?
A.The healing power of poems cures illnesses.
B.Reading can make us feel independent of others.
C.Poetry can improve our emotional well-being.
D.Connection leads to a great sense of belonging.

Using the health records of more than a million Swedish conscripts (应征入伍者), a recent study revealed that keeping cardiorespiratory (心肺的) fitness in their late teens and early twenties can cut the risk of developing nine types of cancer by 40% when older. The research team from the University of Gothenburg, Sweden said, “These results could be used to further strengthen the promotion of interventions aimed at increasing fitness in youth.”

Almost a third of people aged from 16 to 24 in England aren’t physically active, without meeting guidelines of at least 150 minutes of moderate physical activity a week including walking, riding a bike and dancing.

Cardiorespiratory fitness (CRF) measures how well the heart, lungs and linked systems work to get oxygen to muscles during constant activities. The conscripts, aged between 16 and 25, had tests of CRF on exercise bikes between 1968 and 2005. The researchers used Swedish health data to see who went on to have cancer during an average follow-up of 33 years. The study found that increasing fitness was beneficial, regardless of body weight. However, they also found that higher fitness was linked to a higher risk of skin cancer. The researchers explained that this trend might be driven by exposure to sunlight.

Findings from those observational studies provide much evidence for a link between higher levels of physical activity and a lower risk of cancer. However, these studies cannot fully rule out the possibility that active people have lower cancer risk because they engage in other lifestyle behaviors. The researchers cautioned that they had no access to full data on factors such as diet, alcohol intake and smoking and so couldn’t fully account for those.

Dr Claire Knight, of Cancer Research UK, said, “The NHS recommends 150 minutes of activity a week, but it’s fine to build up activity over time and there are lots of ways to be more active. You don’t need to run a marathon or join a gym. Anything that gets you warmer and slightly out of breath and your heart beating faster counts.”

【小题1】What’s the significance of the research findings?
A.They prove the importance of a good diet.
B.They show how our health declines with age.
C.They stress the importance of general health.
D.They give reasons to improve the health of the young.
【小题2】What do we know about CRF?
A.It measures the blood oxygen level.
B.It shows the ability of body systems.
C.It indicates the level of exercise.
D.It controls the spread of cancer in the body.
【小题3】What’s the limitation of the study?
A.It didn’t analyze the collected data thoroughly.
B.It connected sunlight exposure with cancer.
C.It failed to suggest the ideal time for exercise.
D.It didn’t consider other health-related factors.
【小题4】What can be a suitable title for the text?
A.Lifestyle changes in youth help reduce cancer risks
B.Less exposure to sunshine can rid us of cancer
C.The cardiorespiratory system plays a big role
D.Sports have a great effect on our health

Lions are often incorrectly called the “king of the jungle”. These days, the giant cats are not feared as much as another “super predator (捕食者)”—the animals living in South Africa now fear humans more than lions, according to a study published recently. 【小题1】

The study focused on Greater Kruger National Park in South Africa. Scientists set up speakers and cameras around 21 waterholes in the dry season between June and August. The researchers chose the site since waterholes are known as a small pool of water where animals drink. 【小题2】 This makes waterholes a popular hunting spot for both lions and poachers (偷猎者).

During the experiment, the researchers played different sounds. These included lions roaring, and humans speaking calmly in local languages. The study found that animals were twice as likely to run away from a human voice than a lion sound. 【小题3】 The results suggest that animals have learned that being close to humans can be dangerous because they might be poachers. This could pose a problem to national parks that depend on making money from safari tourism. 【小题4】

【小题5】 Endangered species, such as the southern white rhino (犀牛), could be protected by using recorded human voices. For instance, rhinos abandon waterholes much quicker when they hear human voices over other sounds, which could help to drive the frightened species away from places where poachers are known to lie in wait.

A.Visitors might scare the animals away when approaching them.
B.The animals at the waterhole included elephants, giraffes and rhinos.
C.The sounds could keep them away from areas popular with poachers.
D.However, the findings might be very useful for wildlife conservation.
E.Roughly 95 percent of the animals there are more scared of human voices.
F.Animals also abandoned the waterholes 40% faster when they heard human noises.
G.At this time of year, animals come here to drink as other sources of water disappear.

组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网