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　　答案：CDC

　　It's late in the evening: time to close the book and tum off the computer. You're done for the day. What you may not realize, however, is that the learning process actually continues-in your dreams.

　　It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the fragmented, often bizarre imaginings they generate at night. Scientists have found that dreaming about a task we've learned is associated with improved performance in that activity(suggesting that there's some truth to the popular notion that we're "getting" a foreign language once we begin dreaming in it).What's more, researchers are coming to recognize that dreaming is an essential part of understanding, organizing and retaining what we learn-and that dreams may even hold out the possibility of directing our learning as we doze.

　　While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural(神经的)virtual reality .A vivid example of such reenactment can be seen in this video made as part of a 2011 study by researchers in the Sleep Disorders Unit at Piie-Salpetrict Hospital in Paris. They taught a series of dance moves to a group of patients with conditions like sleepwalking, in which the sleeper engages in the kind of physical movement that is normally inhibited during slumber. They then videotaped the subjects as they slept. Lying in bed, eyes closed, the woman on the tape does a faithful rendition of the dance moves she learned earlier-"the first direct and unambiguous demonstration of overt behavioral replay of a recently learned skill during human sleep," writes lead author Delphine Qudiette

　　Of course, most of us are not quite so energetic during sleep but our brains are busy nonetheless. While our bodies are at rest, scientists theorize, our brains are extracting what's important from the information and events we've recently encountered, then integrating that data into the vast store of what we already know-perhaps explaining why dreams are such an odd mixture of fresh experiences and old memories. A dream about something we've just learned seems to be a sign that the new knowledge has been processed effectively. In a 2010 study published in the journal Current Biology, researchers at Harvard Medical School reported that college students who dreamed about a computer maze task they had learned showed a 10-fold improvement in their ability to navigate the maze compared to participants who did not dream about the task.

　　Robert Stickgold, one of the Harvard researchers, suggests that studying right before bedtime or taking a nap following a study session in the afternoon might increase the odds of dreaming about the material. But some scientists are pushing the notion of enhancing learning through dreaming even further, asking sleepers to mentally practice skills while they slumber. In a pilot study published in The Sport Psychologist journal in 2010,University of Bern psychologist Daniel Erlacher instructed participants to dream about tossing coins into a cup. Those who successfully dreamed about the task showed significant improvement in their real-life coin-tossing abilities. Experiments like Erlacher's raise the possibility that we could train ourselves to cultivate skills while we slumber. Think about that as your head hits the pillow tonight.

　　51. What is scientists’ finding about dreaming?

　　A) It involves disconnected, weird images.

　　B) it resembles fragments of science fiction.

　　C) Dreaming about a learned task betters its performance.

　　D) Dreaming about things being learned disturbs one’s sleep.

　　【看题目划关键词】scientists，findings，dreaming，提问实验结果。

　　【看文章找定位据】问实验结果找实验结果词。第二段的第二句话：scientists have found that dreaming about a task we’ve learned is associated with improved performance in that activity. 第三句话: What’s more, researchers are coming to recognize that dreaming is an essential part of understanding, organizing and retaining what we learn.(科学家们发现，梦到我们学过的一项任务与提高该活动的表现有关。更重要的是，研究人员逐渐认识到，做梦是理解、组织和记住我们所学知识的一个重要部分。)

　　【看选项找同义替换】C，梦到学习过的知识可以促进其表现。

　　52. What happens when one enters a dream state?

　　A) The body continues to act as if the sleep were awake.

　　B) The neural activity of the brain will become intensified.

　　C) The brain behaves as if it were playing a virtual reality video game.

　　D) The brain once again experiences the learning activities of the day.

　　【看题目划关键词】what happens, when one enters a dream state 当一个人睡着时会发生什么

　　【看文章找定位句】第三段首句 while we sleep就是when one enters a dream state的同义替换。答案句后半句the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural virtual reality. (大脑会回放醒着时的活动模式，让我们进入一位心理学家所说的神经虚拟现实。)

　　【看选项找同义替换】：D选项“大脑再一次经理白天的活动”是“大脑回放白天的活动”的同义替换。A选项主语是body，非文章定位句子的brain，属于无中生有。B选项大脑的神经活动会强化，无中生有。C选项，大脑像是进入了虚拟游戏，偷换概念。

　　53. What does the brain do while we are sleeping?

　　A) It systematizes all the data collected during the day.

　　B) it substitutes old information with new data.

　　C) It processes and absorbs newly acquired data.

　　D) It classifies information and places it in different files.

　　【看题目划关键词】brain, while we are sleeping当我们睡觉时，大脑在做什么

　　【看文章找定位句】第四段while our bodies are at rest 当我们的身体在休息时，就是当我们在睡觉时的同义替换。答案句就是后面的our brains are extracting what’s important for the information and events we've recently encountered, then integrating that data into the vast store of what we already know大脑提取重要的信息，把这个数据和我们已知信息融合。

　　【看选项找同义替换】C选项，加工和吸收信息，是提取和融合的同义替换

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