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Researchers at the University of Texas Southwestern Medical Center mapped brain changes after a year of aerobic （有氧的） workouts and uncovered a potentially significant process：Exercise increases blood flow into two key areas of the brain associated with memory，
   The study，published in the Journal of Alzheimer's Disease，showed this blood flow can help even older people with memory issues improve cognition （認(rèn)知），a finding that could guide future Alzheimer's disease research，according to UT Southwestern Medical Center.
   In the study，researchers followed 30 participants who were 60 or older and had memory problems.Half experienced a year of aerobic exercise while the other half did stretches（伸展運(yùn)動(dòng)）. "We've shown that even when your memory starts to fade，you can still do something about it by adding aerobic exercise to your lifestyle，" said Binu Thomas，a senior research scientist of UT Southwestern Medical Center who led the study. "The aerobic exercise group showed a 47% improvement in some memory scores after a year；the other group showed slight change.Brain imaging of the aerobic exercise group，taken while at rest at the beginning and end of the study，showed increased blood flew into the specific brain areas that played important roles in memory function."
   Many teams across the world are trying to determine if aerobic exercise might fight memory loss.Evidence is growing that it could at least play a small role in delaying or reducing the risk of Alzheimer's disease.For example，a 2018 study showed that people with lower fitness levels experienced faster retrogression of vital nerve fibers in the brain called white matter related to memory.
   "Blood flow in the brain connected with memory improvement is still a part of the puzzle，and we need to continue piecing it together，" Thomas says. "But we've seen enough date to know that starting a fitness program can have lifelong benefits for our brains as well as our hearts."

（1）What is the study mainly about？
B
B

A．Old people have memory issues.
B．Exercise improves memory.
C．Aerobic workouts benefit mental health.
D．Alzheimer's disease can be cured.
（2）What happened to participants after one-year aerobic exercise？
D
D

A．Earlier memories were refreshed.
B．Memory scores showed very small change.
C．Brain imaging remained the same.
D．More blood flew into memory-related areas.
（3）What does the underlined word "retrogression" mean in the fourth paragraph？
C
C

A．Growth.
B．Recovery.
C．Decline.
D．Extension.
（4）What can be inferred from the last paragraph？
A
A

A．Further research work requires doing.
B．More people experience memory loss.
C．Mystery of brain blood flow has been solved.
D．Signs of memory loss can be discovered earlier.

【考點(diǎn)】社會(huì)；說明文．
【答案】B；D；C；A
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：27引用：9難度：0.4
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  • 1．You're sitting on the train home and the person opposite you yawns（打哈欠）.Suddenly，you're yawning with him，though you're not tired.
       This phenomenon confused scientists for years until a recent study found that people tend to sympathize with fellow humans.Supporting this claim was the discovery that those children who were unable to form normal emotional ties with others did not experience contagious（有感染力的）yawning，which showed that humans communicate regularly with out words.
       Hugo Critchley，a neuroscientist，has conducted an experiment recently，which will prove that happiness and sadness can spread like the common cold.According to Critchley，our minds and bodies are in constant exchange about how we're feeling. "Emotions are closely linked with states of internal（內(nèi)部的）responses，"he explained."There are also more visible changes in our gestures and facial expressions.When we're in a group，these signals can spread to another person.For example，there's the obvious tendency to smile when smiled at and there are less obvious changes that reflect emotions of surprise，anger or sadness such as a change in our heart rate and blood pressure."
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       So，what lessons can we learn from this？"Spend time with happy people-otherwise your health could suffer，"said Critchley."When we're sad，our body goes into fight or flight mode.But when we're happy，our body works normally and we feel relaxed and positive.So we look bright，our skin glows，we feel healthy and it affects everyone around us."

    （1）According to Hugo Critchley，
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    B．we yawn more frequently when we have a cold
    C．emotions are connected with states of internal responses
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    （2）The underlined word "synchronise"in Paragraph 4 means
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    D．respond accordingly
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    B．a(chǎn)nger is less contagious than smile
    C．surprise is more contagious than smile
    D．surprise is the most contagious among emotions
    （4）Which of the following statements is true according to the passage？

    A．Emotions have delicate influence on fellow humans.
    B．Children like copying the actions of the fellow humans.
    C．Scientists are still confused about contagious yawning.
    D．People tend to communicate more with body language.

    發(fā)布：2024/10/21 12:0:1組卷：32引用：2難度：0.7

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    發(fā)布：2024/10/21 4:0:1組卷：6引用：2難度：0.3

  • 3．Every year in May，art galleries and museums prepare shows to honor Leonardo Da Vinci，who died in France on May 2，1519.He is remembered as one of the greatest artists and creative thinkers of all time.His most famous paintings are The Mona Lisa and The Last Supper.
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    （4）What's Eike Schmidt's attitude towards the research？

    A．Unclear.
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    C．Doubtful.
    D．Positive.

    發(fā)布：2024/10/21 5:0:2組卷：13引用：2難度：0.5
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