Sleep is very ancient. In the electroencephalographic(脑电图仪的)sense we share it with al - 试题答案网问答

第1题

-- You look very pale. You ______ very tired.-- I didn't sleep at all last night.A．must be

-- You look very pale. You ______ very tired.-- I didn't sleep at all last night.

A．must be

B．must have been

C．can be

D．can have been

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第2题

People who cant get to sleep are advised to sleep at______.A．any time in a day as long as

People who cant get to sleep are advised to sleep at______.

A．any time in a day as long as one wishes

B．the time when one plans to sleep

C．a very early time at night

D．a very late time at night

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第3题

It could be inferred from the passage that ______.A．a secretive person sleep curled upB．wh

It could be inferred from the passage that ______.

A．a secretive person sleep curled up

B．when you are asleep, you can't control yourself

C．sleeping position may decide personality

D．a very happy person probably gets a well-balanced personality

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第4题

According to paragraph 4，which of the following statements is NOT true？A．She has to learn

According to paragraph 4，which of the following statements is NOT true？

A．She has to learn to repair sails．

B．She has to be her own teacher．

C．She has to be very fit．

D．She has trained herself to sleep for about 20 minutes at a time．

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第5题

What did Richard' S wife do at last？ [A] She enjoyed the old film very much. [B] She

What did Richard' S wife do at last？

[A] She enjoyed the old film very much.

[B] She started to read a book.

[ C] She did nothing but go to sleep;

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第6题

Evolution of SleepSleep is very ancient. In the electroencephalographic sense we share it

Evolution of Sleep

Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles.

There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life-style. of the animal, and that predators are statistically much more likely to dream than prey, which are in turn much more likely to experience dreamless sleep. In dream sleep, the animal is powerfully immobilized and remarkably unresponsive to external stimuli.

Dreamless sleep is much shallower, and we have all witnessed cats or dogs cocking their ears to a sound when apparently fast asleep. The fact that deep dream sleep is rare among prey today seemsclearly to be a product of natural selection, and it makes sense that today, when sleep is highly evolved, the stupid animals are less frequently immobilized by deep sleep than the smart ones. But why should they sleep deeply at all？

Why should a state of such deep immobilization ever have evolved？ Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little. There is, by and large, no place to hide in the ocean.

Could it be that, rather than increasing an animal's vulnerability, the function of sleep is to decrease it？ Wilse Webb of the University of Florida and Ray Meddis of London University have suggested this to be the case. It is conceivable that animals who are too stupid to be quiet on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. The point seems particularly clear for the young of predatory animals. This is an interesting notion and probably at least partly true.

Almost all the mammals and birds do sleep.

A．Right

B．Wrong

C．Not mentioned

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第7题

Why can you discover a staggering difference in your ability to remember after a nights sl

eep？

A．Your memory is strengthened during the sleep.

B．Your brain has had a very good rest.

C．Your brain works better during sleep than you"re awake.

D．Your memory ability is better in the morning.

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第8题

Sleep is very ancient. In the electroencephalographic （脑电图仪的) sense we share it with

Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates (灵长类动物) and almost all the other mammals and birds: it may extend back as far as the reptiles (爬行动物).

There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life style. of the animal, and that predators (食肉动物) are statistically much more likely to dream than prey, which are in turn much more likely to experience dreamless sleep. In dream sleep, the animal is powerfully immobilized (使固定不动) and remarkably unresponsive to external stimuli. Dreamless sleep is much shallower, and we have all witnessed cats or dogs cocking their ears to a sound when apparently fast asleep. The fact that deep dream sleep is rare among prey today seems clearly to be a product of natural selection, and it makes sense that today, when sleep is highly evolved, the stupid animals are less frequently immobilized by deep sleep than the smart ones. But why should they sleep deeply at all？ Why should a state of such deep immobilization ever have evolved？

Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little. There is, by and large, no place to hide in the ocean. Could it be that, rather than increasing an animal's vulnerability, Ray Meddis of London University has suggested this to be the case. It is conceivable that animals that are too stupid to be quite on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. The point seems particularly clear for the young of predatory animals. This is an interesting notion and probably at least partly true.

Which of the following might be the best title for this passage？

A．Evolution of Sleep.

B．Two Types of Sleep.

C．The Original Function of Sleep.

D．Animals and Sleep.

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第9题

Sleep ,as we know, is important to us because it helps restore tired 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.【C1】______we know that there are many people who get【C2】______perfectly with less sleep, and some who may even need【C3】______. A great deal depend on the【C4】______we live. But a good general rule to【C5】______is to sleep as long as we have to in order to feel happy and be able to work【C6】______our best when we awaken.

There are actually different【C7】______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 deep sleep, so that after eight hours of a【C8】______sleep we may still feel tired. But a short, deep sleep can be very【C9】______.

Alexander the Great was able to get a deep sleep【C10】______he needed it. Once, during the night before an important battle, he remained【C11】______much longer than anyone else.【C12】______he wrapped himself in a cloak and【C13】______down on the-earth. He slept so【C14】______that his generals had to wake him three times to give the【C15】______to attack!

Normally when we go to sleep, our!' sleep center" blocks off nerves so that【C16】______our brain and body go to sleep.【C17】______prevents us from wanting to do anything. And the other【C18】______our internal organs and limbs go to sleep.【C19】______sometimes only one goes to sleep and the other does not. A very tired soldier can sometimes【C20】______asleep(brain sleep)and keep on marching, because his body is not asleep.

【C1】

A．Yet

B．Hence

C．Anyway

D．Besides

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第10题

It is believed that the Stonehenge was built there about 3,500 years ago by the ancien

A.Studying the movements of the sun, moon and stars.

B.Studying the weather

C.Studying the movements of the earth

D.None of the above

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第11题

Different Stages of SleepA scientist who has spent many years studying sleep was asked thi

Different Stages of Sleep

A scientist who has spent many years studying sleep was asked this question: "Why do we need sleep？" His answer was."If we do not sleep, we get very sleepy, "No one knows exactly why we sleep．But scientists have learned a lot．From．sleep experiments, scientists have [earned that there are four different stages 0f sleep;

When you first fall asleep, your heart starts to beat more slowly and your breathing slows down．If something wakes you, you might not think that you had been asleep．Some people call this kind of sleep dozing (打盹)．Scientists call it Stage 1 sleep.

Next, if you are no,t awakened, you drift into a deeper sleep．Your pu!se and breathing become even slower than they were during Stage 1 sleep．But you can still be awakened quite easily．If you take a catnap (小睡，打盹), you probably will not get any further than this stage of sleep, which is called Stage 2.

If you sleep longer than about twenty minutes, you go into the third stage of sleep.Your body is very relaxed．It would take a loud noise to wake you up.

You have probably heard of people who walk in their sleep．No one knows what

makes people sleepwalk (梦游)．But a person can sleepwalk only during Stage 4．This is the deepest kind of Sleep．I{ someone wakes you up during Stage 4, you might, feel very confused．It might take you a few minutes to get used to being awake.

After about ten minutes of Stage 4 sleep, you go back to Stage 3 and then to Stage 2.Then, something quite different begins.to happen．Your heartbeat becomes rapid．Your eyelids flutter (跳动), and your eyes move．This stage of sleep is called REM (rapid eye movement) sleep.

Most dreams happen during REM sleep． Scientists who study sleep often make noisesor talk to sleeping people in the REM stage．They are trying to find out what effects noises can have on dreams． As sleep research continues, scientists might also learn what causes dreams and how dreams might be helpful to people.

第 31 题 According to the author, why do we need sleep？

A．If we do not sleep, we get very sleepy.

B．Because there are four different stages of sleep.

C．No one knows the cause.

D．It is not mentioned in the article.

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Sleep is very ancient. In the electroencephalographic（脑电图仪的)sense we share it with al