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提问人:网友zhshjun0825 发布时间:2022-01-06
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Sleep is part of a person's daily activity cycle. There are several different stages of sl

eep, 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, your eyes will roll about a bit, your temperature will drop, your muscles will relax, and your breathing will 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 I 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 along, 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 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 that most dreams seem to occur.

Provided that you do not wake up during the first 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.

Which of the following does the passage mainly discuss?

A.Scientific methods of studying sleep.

B.Why humans require sleep.

C.The phases of sleep.

D.Why dreams occur during REM sleep.

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更多“Sleep is part of a person's daily activity cycle. There are several different stages of sl”相关的问题
第1题
The writer seems to think that ______.A.new ways of inducing sleep is still beyond man's k

The writer seems to think that ______.

A.new ways of inducing sleep is still beyond man's knowledge

B.consciousness is a crucial part in sleep research

C.the understanding of the purpose of sleep is still hard to achieve

D.we've got new insights into the consciousness

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第2题
Which sentence below best expresses the essential information in the highlighted sentence
in paragraph 1? Incorrect choices change the meaning in important ways or leave out essential information.

A.A century ago, health professionals did not experience sleep deprivation; however, now it is a part of their jobs.

B.It is difficult to understand why health professionals have not studied the consequences of sleep deprivation.

C.Sleep deprivation used to affect only certain professions, but now it occurs in all sectors of the working population.

D.Health professionals have just started to understand that sleep deprivation in workers is a serious problem.

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第3题
Part ADirections: You will hear 10 short dialogues. For each dialogue, there is one questi

Part A

Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You will have 15 seconds to answer the question and you will hear each dialogue ONLY ONCE.

听力原文:W: Look here, darling. The paper says people tend to feel unwell if they sleep less than six hours a day.

M: That may be true for you, but it certainly isn' t true for me.

What can we conclude from the man' s reply?

A.He wants to have more sleep.

B.His wife doesn't sleep well.

C.Women need more sleep than men.

D.He doesn't need as much sleep as his wife.

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第4题
Which of the following is the main idea of the passage? ________.A) Evolution has e

Which of the following is the main idea of the passage? ________.

A) Evolution has equipped all creatures with a regular pattern of sleeping and waking.

B) The study of sleep is an important part of the evolutionary theory.

C) Sleeping patterns must be taken into consideration in the designing of robots.

D) The sleeping pattern of a living creature is determined by the food it eats.

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第5题
A. Evolution has equipped all creatures with a regular pattem of sleeping and waking

B. The study of sleep is an important part of the evolutionary theory.

C. Sleeping pattems must be taken into consideration in the designing of robots.

D. The sleeping pattem of a living creature is determined by the food it eats.

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第6题
听力原文:W: Hey, George, I can't get to sleep with the lights so near my bed. Can you stud
y someplace else?

M: Sorry, there is a party going on down in the lounge. I suppose I can check the dining room though.

Q: What will George probably do?

(15)

A.He will take part in the party.

B.He will continue to study in the bedroom.

C.He will continue to study in the dinning room.

D.He will go to have dinner instead of studying.

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第7题
Part Ⅱ Reading Comprehension (Skimming and Scanning)Directions: In this part, you will hav

Part Ⅱ Reading Comprehension (Skimming and Scanning)

Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A, B, C and D. For questions 8-10, complete the sentences with the in formation given in the passage.

Tips for Getting a Good Night's Sleep

I have to admit something—I don't sleep. Okay, I sleep, but it's not nearly enough. I'm lucky if I get seven hours a night, and on the weekends? Let's just say the number decreases significantly. Judging by the long lines at the sixteen Starbucks I pass on my way to work, I'm not alone.

Work, stress, and social lives all pose a devastating effect on our precious sleep cycles. The majority of us are not only lacking necessary sleep hours, but the quality of our sleep leaves something to be desired. Hoping to curb my morning dullness and mid-afternoon sleepiness, I consulted two professional sleep experts to find out how we can achieve the best kind of sleep—sleep that leaves us feeling rested, alert, and not so dependent on caffeine.

Figure out your perfect number

The oft-quoted "eight hours a night" is a rule not unlike "eight glasses of water a day"—good in theory, but too general. The amount of sleep one needs varies from person to person. "There is no magic number that works for everybody," says Dr. Tracy Kuo, a clinical psychiatrist and sleep disorder specialist at Stanford University Sleep Disorders Clinic. "As an individual, you need to figure out what your sleep need is." However, most doctors recommend getting somewhere between seven to eight hours of sleep. Dr. Kenneth Weeks, a cardiologist specializing in sleep disorders and their association with heart problems, suggests shooting for seven-and-a-half hours a night. A good night's sleep means we can function with a steady, healthy level of energy throughout the next day, so find the amount of hours that allows you to achieve this state.

Make sleep a priority

Both Dr. Kuo and Dr. Weeks concur that most of us don't realize the importance of sleep, and they caution that this is one of the worst mistakes we make. "A challenge we all face in modern life is valuing sleep enough,"Dr. Kuo explains. "Most people take time away from sleep to do things, so they're not letting themselves get enough sleep." Sleep restriction has been linked to many problems including mood disorders like depression and anxiety, weight gain, and a shorter life expectancy. Just as we have to make time for health-improving and preventative activities like exercise anti eating well, we should make sure to incorporate an adequate amount of sleep into our schedules, too.

Limit eating and exercise prior to bedtime

Eating a heavy meal or working out too close to bedtime can cause a poor quality of sleep because both lead to sleep fragmentation—waking up throughout the night. Dr. Kuo advises that people "need to have enough time for that activation level caused by exercise to decrease so that sleep is permitted." Both Kuo and Weeks recommend eating or exercising no closer than three to four hours before sleeping.

Unfortunately, hectic schedules sometimes demand that our meal times and gym sessions occur later at night. And, as Dr. Kuo says, "If you go to bed starving, you're not going to go to sleep either." Try relaxing as much as possible after working out; lay down, take deep breaths, and focus on cooling down your body temperature. As for midnight snack attacks, Dr. Weeks recommends eating something "that dissolves quickly and won't sit in the stomach." He lists warm milk and crackers with a little peanut butter as good options.

Pinpoint the negative effects

The best way to figure out whether or not we're getting all the sleep we need is to

A.can make people feel alert

B.should be dependent on caffeine

C.may cause morning dullness

D.is related with mid-afternoon sleepiness

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第8题
听力原文:There are new findings that people with inadequate sleep are likely to gain weigh

听力原文: There are new findings that people with inadequate sleep are likely to gain weight. Researchers say a lack of sleep can produce hormonal changes that increase feelings of hunger.

In one study, researchers from Stanford University in California and the University of Wisconsin examined information on more than one thousand people. The people had taken part in a long-term study of sleep disorders.

Some people slept less than five hours a night. They had fifteen percent higher blood levels of a hormone called ghrelin than people who slept eight hours. And they had fifteen percent less of the hormone leptin. Experts say ghrelin helps make people feel hungry; leptin makes you feel full.

The results were not affected by how much people exercised. People who are awake longer have more time to burn energy. But the researchers say loss of sleep may increase hunger especially for high-calorie foods, so people gain weight.

Researchers found that the best amount of sleep for weight control is seven-point-seven hours a night.

Researchers at the University of Chicago did a smaller study. They found that people who slept just four hours a night for two nights had an eighteen percent reduction in leptin. And they had a twenty-eight percent increase in ghrelin. The young men in that study also appeared to want more sweet and starchy foods.

Researchers from Columbia University in New York did a third study. They found that people who got less than four hours of sleep a night were seventy-three percent more likely to be overweight. This was compared to people with seven to nine hours of sleep. The researchers say that for survival, the body may be designed to store more fat during times with less sleep.

According to the passage, how many universities in the United States took part in the study?

A.Four.

B.Three.

C.Five.

D.Six.

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第9题
SleepSleep is part of a person's daily activity cycle. There are several different stages

Sleep

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, your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing will 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 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.

Every stage of sleep occur in cycles.

A.Right

B.Wrong

C.Not mentioned

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第10题
Sleep is a funny thing. We're taught that we should get seven or eight hours a night, but
a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo last month reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from snoozing(睡)soundly.

Doctors have their own special sleep problems. Residents (住院医生) are famously sleep deprived. When I was training to become a neurosurgeon, it was not unusual to work 40 hours in a row without rest. Most of us took it in stride, confident we could still deliver the highest quality of medical care. Maybe we shouldn't have been so sure of ourselves. An article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person's motor performance is comparable to that of someone who is legally intoxicated. Curiously, surgeons who believe that operating under the influence is grounds for dismissal often don't think twice about operating without enough sleep.

"I could tell you horror stories." says Jaya Agrawal, president of the American Medical Student Association, which runs a website where residents can post anonymous anecdotes. Some are terrifying. "I was operating after being up for over 36 hours," one writes. "I literally fell asleep standing up and nearly face planted into the wound."

"Practically every surgical resident I know has fallen asleep at the wheel driving home from work." writes another. "I know of three who have hit parked cars. Another hit a 'Jersey barrier' on the New Jersey Turnpike. going 65 m. p?h." "Your own patients have become the enemy," writes a third, because they are "the one thing that stands between you and a few hours of sleep."

Agrawal's organization is supporting the Patient and Physician Safety and Protection Act of 2001, introduced last November by Representative John Conyers Jr. of Michigan. Its key provisions, modeled on New York State's regulations, include an 80-hour workweek and a 24-hour work-shift limit. Most doctors, however, resist such interference. Dr. Charles Binkley, a senior surgery resident at the University of Michigan, agrees that something needs to be done but believes "doctors should be hound by their conscience, not by the government'.

The U. S. controls the hours of pilots and truck drivers. But until such a system is in place for doctors, patients are on their own. If you're worried about the people treating you or a loved one, you should feel free to ask how many hours of sleep they have had and if more-rested staffers are available. Doctors, for their part, have to give up their pose of infallibility(不出错)and get the rest they need.

What can we learn from Paragraph 1 ?

A.People who sleep less than 8 hours a day are more prone to illness.

B.Poor sleep quality may be a sign of physical disorder.

C.Stroke is often associated with sleep.

D.Too much sleep can be as harmful as lack of sleep.

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第11题
听力原文:W: Hey, George, I can't get to sleep with the lights so near my bed. Can you stud
y someplace else?

M: Sorry, there is a party going on down in the lounge(休息室). I suppose I can check the dining room though.

Q: What will George probably do?

(15)

A.He will take part in the party.

B.He will continue to study in the bedroom.

C.He will continue to study in the dinning room.

D.He will go to have dinner in stead of studying.

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