阅读模拟 03 · 睡眠与记忆
划词查词是会员功能；查词面板（右上角按钮，或快捷键 /）不限次数，任何单词都能查。
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试卷内划词查词为会员功能 · 右上角查词面板不限
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Students often treat sleep as the first thing to give up when an exam approaches. The logic seems obvious: more hours awake means more hours to study. Research on memory suggests the opposite.
In one well-known experiment, students learned a list of word pairs and were then tested either the same day or after a night's sleep. Those who slept forgot about a quarter of the pairs. Those who stayed awake forgot nearly half. The difference was not simply time: the awake group had extra hours in which to review, yet still performed worse.
What happens during sleep is not passive. The brain replays the patterns formed during the day, moving them from short-term storage to more permanent connections. This process is particularly strong in the second half of the night, which is exactly the part that gets cut when a student goes to bed at three and wakes at seven.
None of this means that sleep can replace studying. Students who slept well but had never learned the material did no better than anyone else. Sleep does not create memory; it protects what has already been learned. The practical advice is therefore narrow but firm: study first, then sleep, and do not trade the second half of the night for one more hour of reading.
What is the common belief the author challenges?
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What did the experiment show?
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Why is the second half of the night important?
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What is the author's final advice?
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Which statement best expresses the main idea?
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