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20 〝Sleep fragmentation〞refers to a marked lack of〝REM〞sleep.
A Right B Wrong C Not mentioned
答案
更多“20 〝Sleep fragmentation〞refers to a marked lack of〝REM〞sleep.A Right B Wrong C Not mention”相关的问题
第1题
A) about 80 minutes
B) about 4060 minutes
C) about 30 munutes
D) about 2040 minutes
本题为单选题，请给出正确答案及解析，谢谢！
第2题
20……
A to stop smoking
B to fall into sleep
C to leave a company
D to mail a parcel
E to go shopping
F to go to the beach
G to resign from the office
H to find a motel
第3题
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．
第4题
Part V Cloze (15 minutes)
Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
Do you wake up every day feeling too tired, or even upset？ If so, then a new alarm clock could be just for you.
The clock, called SleepSmart, measures your sleep cycle, and waits __67__ you to be in your lightest phase of sleep __68__ rousing you. Its makers say that should __69__ you wake up feeling refreshed every morning.
As you sleep you pass __70__ a sequence of sleep states—light sleep, deep sleep and REM (rapid eye movement) sleep—that __71__ approximately every 90 minutes. The point in that cycle at which you wake can __72__ how you feel later, and may __73__ have a greater impact than how much or little you have slept. Being roused during a light phase __74__ you are more likely to wake up energetic.
SleepSmart __75__ the distinct pattern of brain waves __76__ during each phase of sleep, via a headband equipped __77__ electrodes (电极) and a microprocessor. This measures the electrical activity of the wearer’s brain, in much the __78__ way as some machines used for medical and research __79__, and communicates wirelessly with a clock unit near the bed. You __80__ the clock with the latest time at __81__ you want to be wakened, and it __82__ duly (适时地) wakes you during the last light sleep phase before that.
The __83__ was invented by a group of students at Brown University in Rhode Island __84__ a friend complained of waking up tired and performing poorly on a test. “__85__ sleep-deprived people ourselves, we started thinking of __86__ to do about it,” says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea.
67.
67. A) beside
B) near
C) for
D) around
第5题
根据下列文章,请回答 1～20 题。
If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and _______26in bed until the early hours of the morning when you eventually_______27asleep. When you wake up, you don' t feel_______28, but tired and worn out and_______29to face a new day.
Dr. Henry Winkle, in a recent newspaper article_______30Stress and Sleep, _______31that stress and lack of sleep are directly_______32. Dr. Winkle says, "the more we worry, the33we sleep, the more we are unable to deal with_______34If we can find a way to get a good night' s sleep," he_______35,"we can often find the36to deal with what's worrying us. "
So, what is a good night' s sleep？ Research shows that the amount of sleep which people need in order to keep healthy_______37a lot. Seven hours is about the average amount, _______38strangely enough, sleeping longer often gives you a headache_______39of making you feel more refreshed.
Dr. Winkle believes that preparing for sleeping is important. People who work late should try to give themselves a short_______40and do something restful before going to bed. This could be watching TV or listening to music. Doing some exercise_______41 in the day should help yon to feel physically as well as______________42tired. A bedtime drink can also help, but coffee or tea should be avoided as they contain caffeine (咖啡因) and will keep you ________________43"When you put the light _______44," Dr. Winkle says, "concentrate on relaxing your muscles. Working slowly up from your feet, and you'll be asleep_______45 you know it. "
第 1 题
A．turning
B．rolling
C．twisting
D．rotating
第6题
(20)
第7题
"It's much like having a large football player standing on the tooth," says Dr. Noshir Mehta, chairman of general dentistry at Tufts University School of Dental Medicine. During sleep bruxism, he explained, the upper and lower teeth may come into direct contact as much as 40 minutes per hour, and with a force of about 250 pounds. You can compare that with normal circumstances, when a person's teeth make contact for about 20 minutes a day while chewing, and with only 20 to 40 pounds of pressure.
Sleep bruxism is not a disease, but a sleep disorder, the third most common one behind sleep talking and snoring. It is more prevalent in children, and its origins may be different in adults.
"The exact causes are unknown," said Dr. Mehta. He explains that in the 1960s bruxism was thought to be the body's response to "malocclusion", or problems with how the upper and lower teeth fit together; but that theory was discredited for lack of clinical evidence.
Stress was later thought to be the cause, but this failed to explain why not everyone with sleep bruxism was stressed and not everyone with stress ground their teeth. More recent research indicates some relationship of sleep bruxism to neurochemicals, but there is still disagreement on how significant a role they play.
Whatever underlying causes science may show in time, the more immediate contributing factors for sleep bruxism are better understood. The medical literature shows that stress, smoking, alcohol, caffeine and other factors may set off or worsen the condition.
So what should a grinder do？ Some people tried relaxation techniques like yoga, exercise, biofeedback and hypnotherapy. Much as these may have helped their overall health, they didn't seem to kick the football player out of their beds.
Right away, dentists suggest fitting the mouth with a mouth guard, a small plastic device with a price tag of $ 300. It covers some or all of the teeth to protect them against damage, but does not stop the grinding or clenching itself. You can also get an over-the-counter version at the drugstore for $20. However, "the over-the-counter guards are usually better than nothing," said Dr. Mehta. They protect the teeth, but may also be more likely to induce a chewing response and increase bruxism; they can also cause irreversible damage to the arrangement of the teeth, and so should be used only temporarily.
Dr. Lavigne of the Canadian Sleep Society says people who wake up with headaches or jaw pain may clench or grind their teeth, and should consult their dentist, or doctors. There, patients may be directed to try some of the techniques or others. These approaches may reduce bruxism, but since there is no known cure, only the effects can be reliably treated. In the end, mouth guards are still the best defense.
After all, if you're going to square off against a football player every night, you need padding.
Questions:
16.What is sleep bruxism？
17.Which of the following statements is true about sleep bruxism？
18.Which of the following is NOT suggested as an immediate cause of sleep bruxism？
19.The doctor suggests that the over-the-counter mouth guard can only be used occasionally. Why is it so？
20.What does the speaker mean by saying "if you're going to square off against a football player every night, you need padding"？
(36)
A．A sleep disease.
B．A sleep disorder.
C．A neurochemical.
D．A nightmare.
第8题
Questions 26 to 30 are based on the following passage:
Sleep is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. When you first drift off into slumber (安睡), your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing were slow and become quite regular. Your brain waves slow down a bit too, with the alpha rhythm of rather fast waves predominating for the first few minutes. This is called stage 1 sleep. For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. The lower your stage of sleep, the slower your brain waves will be. Then about 40 to 60 minutes after you lose consciousness you will have reached the deepest sleep of all. Your brain waves will show the large slow waves that are known as the delta rhythm. This is stage 4 sleep.
You do not remain at this deep fourth stage all night long, but instead about 80 minutes after you fall into slumber, your brain activity level will increase again slightly. The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids (眼皮) as if you were looking at something occurring in front of you. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep. It is during REM sleep period, your body will soon relax again, your breathing will grow slow and regular once more, and you will slip gently back from stage 1 to stage 4 sleep — only to rise once again to the surface of near consciousness some 80 minutes later.
26.The stages of sleep take on ____.
A) an irregular aspect. B) a regular aspect C) a punctual aspect D) a similar aspect
27.Stage 4 sleep lasts ____.
A) about 80 minutes
B) about 40 60 minutes
C) about 30 munutes
D) about 20 40 minutes
28.The brain waves are the slowest during ____.
A) stage 1 C) stage 4 B) stage 2 and stage 3 D) REM sleep
29.In the second paragraph the word “dart” means ____.
A) glare B) move rapidly or suddenly C) stop moving D) gaze
30.One of the features of REM sleep is that ____.
A) there are large slow waves, though rapid for the first few minutes
B) you have the deepest sleep
C) there are no brain waves
D) the brain waves are a little fast and the brain becomes a little active
第9题
听力原文：M: Good morning, madam. Can I help you？
W: Yes, thanks. I want to go to New York and I'm not sure of the best way to get there.
M: Well, you can get there by the long distance bus. It costs only 20 dollars.
W: Mm, that's not bad. How long does it take to get there？
M: It takes you about ten hours.
W: Ten hours？ That's a long time.
M: Yeah. But you can go at night, and you can get some sleep on the way.
W: That's terrible. I can't sleep well when sitting up.
What does the woman want to do？
A．To find out the best way to New York.
B．To find out information on traveling by bus.
C．To find out the cheapest way to get to New York.
第10题
The investigators performed a series of tissue-transplant experiments with hamsters (仓鼠). Some of the animals were normal hamsters, which have a circadian cycle of 24 hours; the others were mutant(变异型)hamsters whose cycles were only 20 or 22 hours long.
The scientists first removed the SCN from the brans of the hamsters in both groups. They then implanted an SCN from a mutant hamster into the brain of each normal animal, and vice versa. When the hamsters had recovered from their operations, the circadian rhythms of the two groups were reversed. The normal hamsters had a daily cycle of 20 to 22 hours, and the mutants were on a 24-hour cycle.
The identification of the internal clock is an important stepping-stone in understanding the basic, automatic mechanisms of brain function. It may also help in finding ways to relieve human sleep disorders.
The purpose of the experiments was to fund out how the clock works.
A. Right
B. Wrong
C. Not mentioned
