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  3. Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Accord

Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Accord

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问题     Doctors are starting to find more and more information that suggests a connection between exercise and brain development. According to some researches, it seems that exercise can make blood vessels, including those in the brain, stronger and more fully developed. The effects of exercise on brain development can even be seen in babies.(72)Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. Margaret Barnes, a pediatrician, believes in the importance of exercise.(73)She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies.
    In studies with seniors, research has shown that exercise helps older people as well. The exercise does not have to be very difficult. The main goal is just to increase the heart rate. And especially when learning new movements, such as yoga or tai chi, it appears that new memory paths open up in the brain. This can improve people’ s short-term memory.
According to the passage, how does exercise affect the brain?
选项 A、It helps people think more clearly.
B、It improves long-term memory.
C、It makes babies more intelligent.
D、It strengthens blood vessels.
答案D
解析 事实细节题。根据文章第一段第二句话“According to some researches，it seems that exereise can make blood vessels…stronger and more fully developed．”可知通过运动可以强化血管，最终达到促进大脑发育的效果，故选D。
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