三、阅读表达 阅读下面的短文，然后根据短文内容回答问题，题答案不超过 10 个。
Sleep is necessary for our good health. Physically, we are relaxed. However, there are a lot of things going on in our brain while we are asleep. So our brain never really stops working.
Sleep helps recover any forgotten knowledge or skills that people think they have forgotten during the day. Thus, their ability is restored after sleeping. Sleeping strengthens knowledge that is lost during the day and prevents it from being lost further. Thus, it plays an important role in learning new skills, strengthening them, and stabilizing (使稳固) memories so that these skills are kept in your memory forever.
Sleep helps in determining and sorting out (决定和分出) things that we remember and forget. During sleep, the brain selectively stores those aspects of a memory which have a greater emotional value. At the same time, those that the brain considers as less valued are left out. The brain helps restore, restructure, and organize our memories, which may be the reason why people think out new ideas after a night's sleep. A study has confirmed that long-term memories are also formed during sleep. It is clear now that sleep helps us remember the order of particular events in our memories.
There are two stages of sleep: (1) NREM (non-rapid eye movement); (2) REM (rapid eye movement). Many changes happen during the NREM, where our body relaxes and many other functions like brain activity heart rate (心率), blood pressure, and temperature of the body slow down.
The REM stage is an active stage when each of these processes increases beyond the level when we are awake. The REM stage is when most dreams happen. These dreams may be unclear or vivid images (生动的图像) where our brain is processing and gathering information during this stage.
Science can't clearly explain many things about dreams as to why and how they happen. Therefore, we still have a long way to go to get a fully understanding of sleep and brain.
1. Is our brain sleeping or working when we are asleep?

2. Why can people think out new ideas after a night's sleep?

3. What are the two stages of sleep mentioned in the text?

4. In which stage of sleep does our brain process and gather information?

1. (It is still) working.
2. Because our brain helps restore, restructure, and organize our memories.
3. (They are the) NREM (stage) and REM (stage).
4. During the REM stage.

翻译:
### 三、阅读表达
阅读下面的短文，然后根据短文内容回答问题，每小题答案不超过10个单词。
睡眠对我们的健康至关重要。从身体层面来说，我们会处于放松状态。然而，当我们入睡时，大脑中仍有诸多活动在进行，所以我们的大脑从未真正停止工作。
睡眠有助于恢复人们在白天自认为已经遗忘的知识或技能，从而在睡醒后，这些能力得以恢复。睡眠还能强化白天有所损耗的知识，防止其进一步流失。因此，睡眠在学习新技能、强化技能以及稳固记忆方面发挥着重要作用，能让这些技能永久留存于我们的记忆中。
睡眠有助于我们对记住和遗忘的事物进行判断与分类。在睡眠过程中，大脑会选择性地存储记忆中那些具有更大情感价值的方面，同时，那些被大脑认定为价值较低的部分则会被舍弃。大脑会帮助我们恢复、重组并整理记忆，这或许就是人们在一夜睡眠之后能想出新点子的原因。一项研究证实，长期记忆也会在睡眠过程中形成。如今我们清楚，睡眠有助于我们记住记忆中特定事件的顺序。
睡眠分为两个阶段：（1）非快速眼动睡眠（NREM）；（2）快速眼动睡眠（REM）。在非快速眼动睡眠阶段会发生诸多变化，我们的身体会放松，许多其他功能，如大脑活动、心率、血压以及体温都会减缓。
快速眼动睡眠阶段是一个活跃的阶段，在此阶段，上述各项生理过程的活跃度都会超过我们清醒时的水平。快速眼动睡眠阶段是大多数梦境产生的时期。这些梦境可能是模糊的，也可能是生动的画面，在这个阶段，我们的大脑会对信息进行处理和收集。
科学尚无法清晰解释关于梦境的诸多问题，比如梦境为何会发生以及是如何发生的。因此，要完全理解睡眠和大脑的奥秘，我们还有很长的路要走。
1. 当我们入睡时，我们的大脑是在睡觉还是在工作？
（它仍然在）工作。
2. 为什么人们在一夜睡眠之后能想出新点子？
因为我们的大脑会帮助我们恢复、重组并整理记忆。
3. 文中提到的睡眠的两个阶段是什么？
（它们是）非快速眼动睡眠（阶段）和快速眼动睡眠（阶段）。
4. 我们的大脑在睡眠的哪个阶段处理和收集信息？
在快速眼动睡眠阶段。