For many of us, a little time with our smartphones or iPads before sleep is the highlight of the night. But would you still think it is relaxing if you knew that it damages or destroys your sleep? Scientists say that's exactly what it does.
In ancient times, when there were no lamps, telephones or smartphones, the sun was the main source of light. When the sun went down, our brains took that as a signal to start producing melatonin(褪黑素), a chemical that helps us sleep.
However, a healthy amount of melatonin can only be produced in complete darkness.Any light in your bedroom—even the one on the alarm clock or the charging indicator on your cellphone—could disturb the process, not to mention something as bright as smartphone and iPad screens. We tend to hold these much closer than a television or laptop, which allows them to shoot far more light straight into our eyes.
“This is particularly worrisome in populations such as young adults and adolescents, who already tend to be night_owls，” said researcher Brittany Wood at Rensselaer Polytechnic Institute.“Lack of sleep among teens is leading to depression, selfharm, low concentration and poor performance at school，” she added.
While all lights are the enemy of sleep, not all colors of light have the same effect. Our eyes are particularly sensitive to blue light, which is common during the day. Most of the light coming from electronic screens is blue light and it fools our brain into thinking it's still daytime. By contrast, orange or red light has less influence on melatonin production, because our brains recognize it as a signal that the day is ending, according to The Telegraph.
Asking yourself to keep your hands off your smartphone before bedtime might seem unreasonable, but you should at least remember to dim the screen or hold it farther away from your eyes. You could also wear a pair of orange sunglasses that take away the harmful blue light.
【小题1】According to the passage, we can know ________.
| A．it's a good habit to play with smartphones or iPads late into night |
| B．scientists suggest we should avoid using smartphones or iPads |
| C．darkness makes a great impact on the amount of melatonin |
| D．the sun was the only source of light in ancient times |
| A．The darker it is, the more melatonin will be produced. |
| B．The lighter it is, the more melatonin will be produced. |
| C．The more melatonin you have, the worse you'll sleep. |
| D．The more electrical equipment you have, the more melatonin will be produced. |
| A．who are young adults or adolescents |
| B．who don't perform well in school |
| C．who are addicted to a television or laptop |
| D．who are short of sleep at night and perform poorly in daily life |
| A．You should go to bed when the sun goes down. |
| B．You should use an orange or red light electronic screen. |
| C．You should wear a pair of blue sunglasses when sleeping. |
| D．You should avoid blue light as possible as you can before bedtime. |
备战中考寒假系列答案科目：高中英语 来源： 题型：阅读理解
I am a writer.I spend a great deal of my time thinking about the power of language—the way it can evoke(唤起)an emotion，a visual image，a complex idea，or a simple truth.Language_is_the_tool_of_my_trade.And I use them all—all the Englishes I grew up with.
Born into a Chinese family that had recently arrived in California，I've been giving more thought to the kind of English my mother speaks.Like others，I have described it to people as “broken” English.But I feel embarrassed to say that.It has always bothered me that I can think of no way to describe it other than“broken”，as if it were damaged and needed to be fixed，as if it lacked a certain wholeness.I've heard other terms used，“limited English”， for example.But they seem just as bad，as if everything is limited，including people's perceptions(认识)of the limited English speaker.
I know this for a fact，because when I was growing up, my mother's “limited” English limited my perception of her.I was ashamed of her English.I believed that her English reflected the quality of what she had to say.That is，because she expressed them imperfectly her thoughts were imperfect. And I had plenty of evidence to support me：the fact that people in department stores，at banks，and at restaurants did not take her seriously，did not give her good service，pretended not to understand her，or even acted as if they did not hear her.
I started writing fiction in 1985.And for reasons I won't get into today，I began to write stories using all the Englishes I grew up with：the English she used with me，which for lack of a better term might be described as“broken”：and what I imagine to be her translation of her Chinese，her internal(内在的)language，and for that I sought to preserve the essence，but neither an English nor a Chinese structure.I wanted to catch what language ability tests can never show：her intention，her feelings，the rhythms of her speech and the nature of her thoughts.
【小题1】By saying“Language is the tool of my trade”，the author means that ________.
| A．she uses English in foreign trade |
| B．she is fascinated by languages |
| C．she works as a translator |
| D．she is a writer by profession |
| A．impolite | B．amusing | C．imperfect | D．practical |
| A．well structured | B．in the old style |
| C．easy to translate | D．rich in meaning |
| A．The change of the author's attitude to her mother's English. |
| B．The limitation of the author's perception of her mother. |
| C．The author's misunderstanding of “limited” English. |
| D．The author's experiences of using broken English. |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Sex prejudices are based on and justified by the ideology(意识形态) that biology is destiny. According to this ideology, basic biological and psychological differences exist between the sexes. These differences require each sex to play a separate role in social life. Women are the weaker sex both physically and emotionally. Thus, they are naturally suited, much more so than men, to the performance of domestic(家庭的) duties. A woman’s place, under normal circumstances, is within the protective environment of the home. Nature has determined that women play caretaker roles, such as wife and mother and homemaker. On the other hand, men are best suited to go out into the competitive world of work and politics, where serious responsibilities must be taken on. Men are to be the providers; women and children are “dependents”.
The ideology also holds that women who wish to work outside the household should naturally fill these jobs that are in line with the special capabilities of their sex. It is appropriate for women, not men, to be employed as nurses, social workers, elementary school teachers, house-hold helpers, clerks and secretaries. These positions are simply an extension of women’s domestic role. Informal distinctions between “women’s work” and “men’s work” in the labor force, according to the ideology, are simply a functional reflection of the basic differences between the sexes.
Finally, the ideology suggests that nature has worked her will in another significant way. For the human species to survive over time, its members must regularly reproduce. Thus, women must, whether at home or in the labor force, make the most of their physical appearances.
So goes the ideology. It is, of course, not true that basic biological and psychological differences between the sexes require each to play sex-defined roles in social life. There is enough evidence that sex roles vary from society to society, and those role differences that do exist are largely learned.
But to the degree people actually believe that biology is destiny and that nature intended for men and women to make different contributions to society, sex-defined roles will be seen as totally acceptable.
【小题1】According to the biology-is-destiny ideology, women_______.
| A．cannot compete with men in any field |
| B．are suited more to domestic jobs than men |
| C．are sensitive enough to be a good caretaker |
| D．are too weak to do any agricultural work at all |
| A．women shouldn’t go out for work |
| B．women should earn money to add the family income |
| C．women going out for work should only do “women’s work” |
| D．women should take jobs to drill the special capabilities of the sex |
| A．are determined by what they are better suited to |
| B．grow out of their household responsibilities |
| C．represent their breakthrough of sex discrimination |
| D．are physically and emotionally suitable to them |
| A．Sex roles are socially determined |
| B．Sex roles are emotionally and physically determined |
| C．Sex roles are biologically and psychologically determined |
| D．Sex roles are determined by education people take |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
According to the US Geological Survey, about seven million earthquakes strike worldwide every year—but fortunately, only about 1500 of these are of a magnitude(震级) of 5 or greater on the Richter scale. Certain areas, such as California and Japan, are more prone to earthquakes than others. Although the chance of being caught in “The Big one” is remote, it’s wise to be prepared if you live in a region where earthquakes are common.
Educate your family about earthquakes before a big one strikes. For example, they need to know to take shelter in a doorway or under a strong object if indoors, and never to run outdoors if they are inside. If outside, they need to know to stay away from power lines and buildings where objects could fall.
Teach family members how to turn off gas or water lines or electrical power that may need to be shut off after a quake if severe damage occurs.
Develop a plan. Where will your family meet in the event of a disaster? What if some people are at work or school? How will you know if they are safe? Where will you all meet up?
Pack a preparedness kit(衣物装备) and keep it in a safe location. In a major earthquake, it’s possible that you won’t be able to get into your house. Keep supplies in your car trunk or an outside storage shed if possible. Pack whatever your family is likely to need, enough for three days to a week, including food, water, medication, first aid and personal hygiene supplies, flashlights, a portable radio, blankets, clothes and shoes, cash, or camp stove, candles, matches or lighters, and a whistle.
Consider earthquake insurance for your home if you live in an earthquake-prone area. Regular homeowner’s insurance doesn’t cover earthquake damage.
【小题1】The underlined words “prone to ” in paragraph 1 can be replaced by___________.
| A．likely to suffer | B．frequent to explore |
| C．regular to measure | D．impossible to experience |
| A．stay where you are | B．hide under a big tree |
| C．avoid power lines | D．sit on the ground |
| A．about 1,500 earthquakes happen every year |
| B．people should store some clothes in their houses in advance |
| C．family members should meet in their home after an earthquake |
| D．people suffering earthquakes often should buy earthquake insurance |
| A．How to Keep Safe in an Earthquake |
| B．How to Prepare for an Earthquake |
| C．Who Can Help Us After an Earthquake? |
| D．Where Is an Earthquake-prone Area? |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
In the last couple of years, there has been a craze about timetraveling TV series in China.This year, it seems like the South Korean drama writers have fallen in a deep, neverending love with the timetravel trend.
Rooftop Prince
A prince from the Joseon era (18th century), Lee Gak is catapulted 300 years forward into the future in Seoul 2012 with his entourage(随从) when he tries to investigate the suspicious circumstances which surround the death of the woman he loves.In the present, he finds a young woman who looks exactly like his beloved crown princess.
Queen Inhyun's Man
The drama, set during the Joseon era, features the hero Kim Boongdo as he tries to restore the exiled Queen Inhyun.It is in this time period he is given the timetraveling power that transports him to the future world where he makes friends with an actress playing the role of Queen Inhyun for a drama in her time.
Dr Jin
Jin Hyuk is a genius neurosurgeon.Through a mysterious power, Jin finds himself transported back in time 150 years.He begins treating people there, but the lack of equipment and medical knowledge of the period forces him to seek new ways to aid the sick.Through this challenging process, Jin eventually becomes a genuine doctor.
Operation Proposal
Kang Baekho realizes that he falls in love with his best friend, Ham Yiseul, on the day of her wedding to another man.He travels back in time to various events of their lives hoping to change the outcome of their relationship.Will Kang be able to change the course of their future?
【小题1】Which of the following words can replace “catapulted” in Paragraph 2?
| A．Captured. | B．Transported. |
| C．Traveled. | D．Deserted. |
| A．They are all about love. |
| B．They all describe what happened in ancient times. |
| C．They are all based on true stories. |
| D．They all feature timetravel. |
| A．Rooftop Prince. | B．Queen Inhyun's Man. |
| C．Dr Jin. | D．Operation Proposal. |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Reseachers at the University of Kansas say that people can accurately juage 90 percent of a stranger's personality simply by looking at the person’s shoes．“Shoes convey useful information about their wearers，’’the authors wrote in the new study published in the Journal of Research in Personality．
Lead researcher Omri Gillath said the judgments were based on the style，cost，color and condition of someone’s shoes．In the study，63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants．Volunteers in the study were photographed in their most commonly worn shoes，and then filled out a personality questionnaire．
Some of the results were expected：People with higher incomes most commonly wore expensive shoes，and flashier shoes were typically worn by outgoing people．However，some of the more specific results are strange enough．For example，“practical and functional’’ shoes were generally worn by more “pleasant" people，while ankle boots were more linked with ‘‘aggressive’’ personalities．The strangest of all may be that those who wore‘ ‘uncomfortable looking” shoes tend to have “calm” personalities．And if you have several pairs of new shoes or take extreme care of them，you may suffer from “attachment anxiety"，spending lots of time worrying about what other people think of your appearance．There was even a political calculation in the mix with more liberal(主张变革的)types wearing “shabbier and less expensive” shoes．
The researchers noted that some people will choose shoe styles to mask their actual personalities，but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities．
【小题1】What does this text mainly tell us?
| A．Shoes Call hide people’s real personalities． |
| B．Shoes convey false information about the wearer． |
| C．People’s personalities call be judged by their shoes． |
| D．People know little about their personalities． |
| A．provide pictures of their shoes |
| B．look at pictures of different shoes |
| C．design a personality questionnaire |
| D．hand in their commonly worn shoes |
| A．Wealthy people often wear expensive shoes． |
| B．Pleasant people like wearing uncomfortable shoes． |
| C．Aggressive people are likely to wear"ankle boots． |
| D．Fashion shoes are typically worn by outgoing people． |
| A．wear strange shoes | B．worry about their appearance |
| C．have a calm character | D．become a political leader |
| A．inform us of a new study | B．introduce a research method |
| C．teach how to choose shoes | D．describe different personalitie |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
No one knows why we sleep, but it’s certain that we need to. People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly, and they fall asleep during the working hours; some may have hallucinations(幻觉).?
There are no rules about sleep. Generally speaking, grown-ups sleep about 7 and a half hours each night and probably more than 60 per cent get between seven and eight hours. But perhaps eight per cent are quite happy with 5 hours or less, and four per cent or so find that they want ten hours or more. If you feel all right, you’re probably getting enough sleep. The important thing is not to worry how much other people get—their needs may be different. Exercise doesn’t seem to increase the need for sleep—office workers, for example, sleep for about as long as people doing physically active work.?
Children sleep more than grown-ups—perhaps 14 to 18 hours soon after birth, going down to grown-up levels by early teenage. Sleep patterns also tend(倾向) to be different in the elderly, who may sleep less at night than they did when younger, find sleep getting more broken, and often make it a rule to sleep during the daytime.
【小题1】According to the passage, some people are unable to think clearly because ___________ .
| A．they have hallucinations |
| B．they feel sleepy during the working hours |
| C．they don’t have enough sleep |
| D．they are certain to be kept from going to bed |
| A．All grown-ups must have at least eight-hour sleep. |
| B．Most of grown-ups sleep for seven or eight hours. |
| C．Quite a few people need only 5 hours or less for them to sleep. |
| D．No grown-ups sleep more than ten hours. |
| A．how many hours you have slept |
| B．how many hours you need to sleep |
| C．whether you do exercise and physical work |
| D．whether you feel fresh and energetic |
| A．as long hours as a grown-up |
| B．much longer hours than a grown-up |
| C．for 14 hours each night |
| D．for less than 8 hours per night |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
There is an endless supply of stories about sleepwalkers(梦游者). People have been said to climb on roofs, solve mathematical problems, write music, walk through windows, and do murder in their sleep.
In Revere, Massachusetts, a hundred policemen searched for a lost boy who left his home in his sleep and woke up five hours later on a strange sofa in a strange living room, with no idea how he had got there.
At the University of Lowa, a student was reported to have the habit of getting up in the middle of the night and walking three-quarters of a mile to the Lowa River. He would take a swim and then go back to his room to bed.
An American expert on sleep claims(声称) that he has never seen a sleepwalker. He is said to know more about sleep than any other living man, and during the last thirty-five years he has lost a lot of sleep watching people sleep. He says, “Of course, I know that there are sleepwalkers because I have read about them in the newspapers. But none of my sleepers ever walked, and if I were to advertise for sleepwalkers for an experiment, I doubt whether I would get many takers(应征者).”
Sleepwalking, however, is a scientific reality. It is one of those strange things that sometimes look quite fantastic(奇特的). Doctors say that sleepwalking is much more common than is generally supposed. Many sleepwalkers do not try to find help and their sleepwalking is never recorded.
【小题1】Generally speaking, sleepwalkers are people who __________.
| A．do fantastic things during their sleep |
| B．walk through windows |
| C．climb on roofs |
| D．walk in a half-awake state |
| A．was found on a strange sofa, telling how he had got there |
| B．lost his way five hours after he left home |
| C．slept in his own room but woke up in a strange room |
| D．was searched for by policemen when he lost his way |
| A．walking three-quarters of a mile every day |
| B．getting up in the middle of the night and walking down to the river |
| C．swimming in the Lowa River before going to bed |
| D．walking about before he went to bed |
| A．It is so common that it needn’t be recorded. |
| B．Scientists take no interest in it. |
| C．No records about it have been made. |
| D．Most sleepwalkers do not seek help for their problem. |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Stay-at home careers are the preferred way to earn a living for those who like to set their own hours and be their own boss, mothers of young children, and those who like to avoid office politics. There are plenty of opportunities to earn from home. Even if you earn little first, the quality of life should make up for the loss of income. Take a look at the following choices for home-birds:
Online tutoring—You can earn anything from Rs 8,000 to 30,000 a month if you are a qualified teacher with computer and communication skills. The subjects in demand these days are math, English, physics, chemistry and biology. You can either teach part-time (4 hours) or full-time (9 hours).
Freelance writers—You have a good writing skills but don’t have time to work a nine-to-five job? You can still use your skills and earn a good amount of money. Many companies these days require good writers. One can earn up to Rs 8,000 to 50,000.
Online-traders—Earn a lot of money by share trading. Just clear the NCFM (Capital Market) exam and you can start trading. You can bring in Rs 10,000 to 1000,000 per month.
Designers—If you have the creative skills and a creative gift, try becoming a designer. Designers are required in different fields. One can earn nearly Rs 8,000 to 20,000 per month.
【小题1】According to the passage, those who likes stay-at-home careers ________.
| A．perhaps can’t earn as much as those working in an office |
| B．needn’t do anything at home and earns a lot |
| C．can’t be mothers who have children to look after |
| D．are often worried about office politics |
| A．be more than 18 years old |
| B．pass a kind of exam |
| C．have good writing skills |
| D．have creative skills and a creative gift |
| A．sell products to readers |
| B．join the author’s company |
| C．give some advice to readers |
| D．get help from readers |
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
