四六级

　　阅读向来是四级考生的复习重点，在日常练习中大家可以多吸取一些做题经验，也可以通过做练习题多总结答题技巧，下面小编为大家带来了一些英语四级阅读练习题，希望对大家有帮助！

　　Quality Sleep "Rescues Memories"

　　Even facts "forgotten" by people during a busy daymay be retrieved if this is followed by a good night'ssleep.

　　Researchers from the University of Chicago askedvolunteers to remember simple words. Many found their memories letting them down1 towardsthe end of the day, but the following morning, those who had slept well could recall much more .

　　Researchers, writing in the journal Nature2, said the brain could"rescue"lost memories duringthe night.

　　When the brain is first asked to remember something, that memory is laid down in an " unstable "state , meaning that it is possible that it could be lost. At some point, the brainconsolidates those it deems important into a" stable ", more permanent state. However,theChicago researchers suggested that it was possible for a" stable "memory to be made " unstable"again. This would mean that memories could be modified then filed away again in theface of new experiences.

　　The 12 volunteers tested in the experiment were played words created through a speechsynthesizer which were purposely difficult to understand. Initially, the written version of theword was available , but afterwards the volunteers were asked to identify the word from theaudio version only. Tests revealed that the ability to recall the right word tended to tail off3 asthe day ended.

　　However, when the volunteers were retested after a good night's sleep , they were able to recallsome words that they had" forgotten"the previous evening. Dr Daniel, one of the studyauthors, said:"Sleep consolidates memories, protecting them against subsequent interferenceor decay. Sleep also appears to'recover'or restore memories. "He said :" If performance isreduced by decay, sleep might actively recover what has been lost. "

　　Dr Karim Nader, from the Department of Psychology in McGill University in Montreal, said:"Memory research is undergoing a transformation — no longer is memory thought to be ahard-wiring of the brain, instead it seems to be a process of storage and restorage. "

　　Sleep helps some memories"mature"and also prunes out unimportant memories.

　　Ⅰ. True or False:

　　1. Researchers asked volunteers from the University of Chicago to remember simple words.

　　2. The 12 volunteers tested in the experiment played word games.

　　3. The volunteers can see and hear the words first, then they can hear them only.

　　4. Sleep makes memories powerful, protecting them against later harm.

　　Ⅱ. Question:

　　Who compares memories with the process of storage and restorage?

　　参考答案：

　　Ⅰ. 1. F 2. F 3 . T 4 . T

　　Ⅱ. Dr Karim Nader, from the Department of Psychology in McGill University in Montreal.

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