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[主观题]

When lab rats sleep, their brains revisit the maze they navigated during the day, accordin

g to a new study (1)_____ yesterday, offering some of the strongest evidence (2)_____ that animals do indeed dream. Experiments with sleeping rats found that cells in the animals' brains fire in a distinctive pat tern (3)_____ the pattern that occurs when they are (4)_____ and trying to learn their way around a maze.

Based on the results, the researchers concluded the rats were dreaming about the maze, (5)_____ re viewing what they had learned while awake to (6)_____ the memories.

Researchers have long known that animals go (7)_____ the same types of sleep phases that people do, including rapid-eye-movement (REM) sleep, which is when people dream. But (8)_____ the occasional twitching, growling or barking that any dog owner has (9)_____ in his or her sleeping pet, there's been (10)_____ direct evidence that animals (11)_____. If animals dream, it suggests they might have more (12)_____ mental functions than had been (13)_____.

"We have as humans felt that this (14)_____ of memory—our ability to recall sequences of experiences—was something that was (15)_____ human," Wilson said. "The fact that we see this in rodents (16)_____ suggest they can evaluate their experience in a significant way. Animals may be (17)_____ about more than we had previously considered."

The findings also provide new support for a leading theory for (18)_____ humans sleep—to solidify new learning. "People are now really nailing down the fact that the brain during sleep is (19)_____ its activity at least for the time immediately before sleep and almost undoubtedly using that review to (20)_____ or integrate those memories into more usable forms," said an assistant professor of psychiatry at Harvard Medical School.

A．related

B．retained

C．released

D．relieved

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更多“When lab rats sleep, their bra…”相关的问题

第1题

How much living space does a person need？ What happens when his space needs are not met？ S

cientists are making experiments on rats to try to determine the efforts of over crowded conditions on man. Recent studies have shown that the behaviour of rats is greatly affected by space. If rats have enough living space, they eat well, sleep well and produce their young well. But if their living conditions become too crowded, their behaviour and even their health change obviously. They can't sleep and eat well, and signs of fear and worry become clear. The more crowded they are, the more they tend to bite each other and even kill each other. Thus, for rats, population and violence are directly related. Is this a natural law for human society as well？ Is enough space not only satisfactory, but necessary for human survival？

The writer is mainly talking about ______.

A．a person's living space needs

B．building and floors

C．equipment and conditions

D．population and violence

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第2题

When the mongooses in Jamaica killed off the rats they______.A．attacked humansB．ate the su

When the mongooses in Jamaica killed off the rats they______.

A．attacked humans

B．ate the sugar crop

C．became problems themselves

D．had nothing to eat

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第3题

When learning the boys would sleep outside, the man's wife ______.A．was looking forward to

When learning the boys would sleep outside, the man's wife ______.

A．was looking forward to the visit.

B．started cooking.

C．moved into the garden.

D．was still worried.

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第4题

I_______ sleep well when I was younger.

A.don’t used to

B.didn’t used to

C.didn’t use to

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第5题

We can ______ with eight computers in the lab at the moment, but we'll need a couple more

when the new staff arrive.

A．get by

B．get across

C．get through

D．get put down

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第6题

In Hamlet's soliloquy , when he says , " To sleep , perchance to dream :－－ay

A.The bad dreams that have recently been troubling him .

B.The fact that if dying is like going to sleep , then perhaps after death wehave bad dreams .

C.The sinful behavior. of Gertrude , whose guilty dreams he would like toknow .

D.His desire to sleep so that he will not have to take vengeful action .

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第7题

Passage One Animals have different ways of protecting themselves against wintertime weat

Passage One

Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home.

Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as hibernation.

There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.

One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice.

Some animals that fall into a wintertime sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.

Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.

36. Hibernation is a seasonal practice. This means it ______.

A. takes place only during a particular season

B. occurs only during the night

C. is a daily practice

D. only happens when a species becomes over-populated

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第8题

（英语类学生必做）Sleep is important to us because it helps restore organs and tissues in ou

（英语类学生必做）

Sleep is important to us because it helps restore organs and tissues in our body. But how much sleep do we actually need？

For most of us, eight hours seems to be about the right amount. Yet we know that there are many people who get 【61】 perfectly with less sleep, and some who may need 【62】 A great deal depends on the 【63】 we live. But a good general rule 【64】 is to sleep as long as we have to in order to feel happy and be able to work 【65】 our best when we awaken.

There are actually different 【66】 of sleep. There is a deep sleep and a shallow sleep. In a shallow sleep our body does not get the same kind of rest it gets in a 【67】 sleep, 【68】 after eight hours of a shallow sleep we may still feel tired. But a short, deep sleep can be very 【69】 Alexander—the Great Emperor was able to get a deep sleep 【70】 he needed it. Once, during the night before an important battle, he remained 【71】 longer than anyone else. 【72】 he wrapped himself in a cloak and 【73】 down on the earth. He slept so 【74】 that his generals had to wake him three times for him to give the 【75】 to attack!

Normally when we go to sleep, our " sleep center" blocks off nerves so that 【76】 our brain and body go to sleep. 【77】 prevents us from wanting to do anything, and the other 【78】 our internal organs and limbs go to sleep. 【79】 sometimes only one goes to sleep and the other does not. A very tired soldier can sometimes 【80】 asleep (brain sleep) and keep on marching, because his body is not asleep.

(86)

A．across

B．away

C．along

D．over

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第9题

Everyone has got two personalities-the one that is shown to the world and the other that i

s secret and real. You don't show your secret personality when you're awake. Because you can control yourself. But when you're asleep, your sleeping position shows the real you. In a normal night, of course, people often change their position. The important position is the one you go to sleep in.

If you go to sleep on your back, you're a very open person. You usually believe people and you accept new things or new ideas easily. You don't like to make people sad, so you never express your real feeling. You're quite shy.

If you sleep on your stomach, you are a rather secretive person. You worry a lot and you always easily become sad. You usually live for today not tomorrow. This means that you enjoy having a good time.

If you sleep curled up, you are probably a very nervous person. You have a low opinion of yourself. You're shy and don't like meeting people. You prefer to be on your own. You're easily hurt.

If you sleep on your side, you have usually got a well-balanced personality. You know your strengths and weaknesses. You're usually careful. You don't often get sad. You always say what you think even if it makes other people unhappy.

When do you show your secret personality？

A．When you are awake.

B．When you fall into deep sleep.

C．The moment you go to sleep.

D．when you lie in bed.

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第10题

There is no creature that does not need sleep or complete rest every day.If you want to kn

There is no creature that does not need sleep or complete rest every day.

If you want to know why, just try going without sleep for a long period of time. You will discover that your mind and body would become too tired to work properly. You would become irritable and find it hard to think clearly or concentrate on your work. So sleep is quite simply the time when the cells of your body recover from the work of the day and build up supplies of energy for the next period of activity.

One of the things we all know about sleep is that we are unconscious in sleep. We do not know what is going on around us. But that doesn't mean the body stops all activity. The important organs continue to work during sleep, but most of the body functions are slowed down.

For example, our breathing becomes slower and deeper. The heart beats more slowly, and the blood pressure is lower. Our arms and legs become limp(柔软的) and muscles are at rest. It would be impossible for our body to relax to such an extent if we were awake. So sleep does for us what the most quiet rest can not do.

Your body temperature becomes lower when you are asleep, which is the reason people go to sleep under some kind of covers. And even though you are unconscious, many of your reflexes(习惯性思维) still work. For instance, if someone tickles(使觉得痒) your foot, you will put it away in your sleep, or even brush a fly from your forehead. You do these things without knowing it.

If you don't have as much sleep as your body needs, you will ______.

A．work properly

B．think clearly

C．keep your attention on your work

D．easily get angry

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