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  3. What is the possible reason that some foods promote the brain performance? [orig

What is the possible reason that some foods promote the brain performance? [orig

游客2023-12-24  5
问题 What is the possible reason that some foods promote the brain performance?
Why certain food choices might help the brain function better remains unclear. Perhaps these regimens’ known cardiovascular benefits, which promote a good flow of blood and oxygen to the brain, are key. But other factors may be at work. Of course, questions about when these dietary changes need to happen or how diet stacks up against other factors, such as physical activity, sleep patterns and genetics also remain unanswered.
选项 A、These foods may change sleep patterns.
B、These foods can affect physical activity.
C、These foods may influence genetic behavior.
D、These foods transport more oxygen to the brain.
答案 D
解析 讲话者的思路可通过语句的起承转合来体现。他首先指出某些食物能让大脑工作得更好，这其中的原因尚未可知。然后又指出可能的原因是它们能让血液流动更快，为大脑提供更多氧气。接下来，讲话者的思路又一次转折，他认为这些食物引起的变化什么时候开始的，它和身体活动、睡眠方式以及遗传学之间的关系还是未解之谜。
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