2. 外语
  3. Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem. They say sleep stre

Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem. They say sleep stre

admin2012-04-07  61
问题     Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.
   Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It’s like knowing the difference between dogs and cats, even if it’s hard to explain. "
   The US research team studied how well students remembered connections between words and symbols (象征), reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night’s sleep than after the same time spent awake during the day. They also found it easier to remember themes (主题) that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University’s Sleep Research Centre, said, "People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢复的) value. "   “We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all."
In the study by the US research team, students were asked to ______.
选项 A、put together words of similar meanings
B、remember words and their meanings
C、show their knowledge of words
D、make up lists of related words
答案B
解析 细节题。对应的信息位于第三段第一句，该句明确指出研究的目的是测试how well students remembered connections between words and symbols(测试学生对单词及其象征意义之间联系的记忆程度)，其中的words and symbols就是指选项[B]中的words and their meanings。其余三项都与原文的说明不符。
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