The effects of rapid travel on the body are actually far more disturbing than we realize. Jet Lag is not a psychological consequence of having to readjust to a different time zone. It is due to changes in the body’s physiological regulatory mechanisms, specifically the hormonal systems, in a different environment.
Now that we understand what Jet Lag is, we can go some way to overcome it. A great number of the body’s events are scheduled to occur at a certain time of day. Naturally these have to be regulated, and there are two regulatory systems which interact.
One timing system comes from the evidence of our senses and stomachs, and the periodicity we experience when living in a particular time zone. The other belongs in our internal clocks (the major one of which may be physically located in a part of the brain called the suprachiasmatic nucleus) which, left alone, would tie the body to a 25-hour rhythm. Normally the two timers are in step, and the surroundings tend to regularize the internal clocks to the more convenient 24-hour period.
If, however, you move the whole body to a time zone which is four hours different, the two clocks will be out of step, like two alarm clocks which are normally set together, but which have been reset a few hours apart. Whereas the two clocks would normally sound their alarms together, now they ring at different times. Similarly, the body can be set for evening while the sun is rising.
In time the physiological system will reset itself, but it does take time. One easily monitored rhythm is palm sweating. A man flown to a time zone different by 10 hours will take eight days to readjust his palm sweat. Blood pressure, which is also rhythmical, takes four days to readjust.
What can we do about it? It is not feasible to wait four days until the body is used to the new time zone. Fortunately there is a short cut. It relies on two things-the power of the stomach to regulate the timing of other events, and the pharmacological actions of coffee. The basic assumptions are:
Coffee delays the body clock in the morning, and advances it at night. Coffee at mid-afternoon is neutral. Protein in meals stimulates wakefulness, while carbohydrates promote sleep. Putting food into an empty stomach helps synchronize the body clock.
46. What is jet lag associated with?
A. Psychological change. B. Physiological change.
C. Inexperience of rapid travel. D. Unfamiliar environment.
47. What helps us to adjust to a 24-hour rhythm?
A. Alarm clock. B. Suprachiasmatic nucleus in our brain.
C. Signals from outside of the body. D. Our senses and stomachs.
48. What do we know from the fifth paragraph?
A. A person moving to a different time zone will suffer from high blood pressure.
B. A person moving to a different time zone will sweat a lot.
C. Moving to a different time zone will affect both palm sweat and blood pressure.
D. If the rhythm of blood pressure and palm sweat are not in step, there will be jet lag.
49. What should we do if we want to stay awake?
A. To take coffee at three o’clock in the afternoon.
B. To have meals that contain lots of protein.
C. To have some carbohydrate drinks.
D. To stop putting food into our stomach.
50. How can we cure jet lag?
A. To sleep for days. B. To wait for self-recovery.
C. To drink tea. D. To get something to eat.
高三英语阅读理解简单题
The effects of rapid travel on the body are actually far more disturbing than we realize. Jet Lag is not a psychological consequence of having to readjust to a different time zone. It is due to changes in the body’s physiological regulatory mechanisms, specifically the hormonal systems, in a different environment.
Now that we understand what Jet Lag is, we can go some way to overcome it. A great number of the body’s events are scheduled to occur at a certain time of day. Naturally these have to be regulated, and there are two regulatory systems which interact.
One timing system comes from the evidence of our senses and stomachs, and the periodicity we experience when living in a particular time zone. The other belongs in our internal clocks (the major one of which may be physically located in a part of the brain called the suprachiasmatic nucleus) which, left alone, would tie the body to a 25-hour rhythm. Normally the two timers are in step, and the surroundings tend to regularize the internal clocks to the more convenient 24-hour period.
If, however, you move the whole body to a time zone which is four hours different, the two clocks will be out of step, like two alarm clocks which are normally set together, but which have been reset a few hours apart. Whereas the two clocks would normally sound their alarms together, now they ring at different times. Similarly, the body can be set for evening while the sun is rising.
In time the physiological system will reset itself, but it does take time. One easily monitored rhythm is palm sweating. A man flown to a time zone different by 10 hours will take eight days to readjust his palm sweat. Blood pressure, which is also rhythmical, takes four days to readjust.
What can we do about it? It is not feasible to wait four days until the body is used to the new time zone. Fortunately there is a short cut. It relies on two things-the power of the stomach to regulate the timing of other events, and the pharmacological actions of coffee. The basic assumptions are:
Coffee delays the body clock in the morning, and advances it at night. Coffee at mid-afternoon is neutral. Protein in meals stimulates wakefulness, while carbohydrates promote sleep. Putting food into an empty stomach helps synchronize the body clock.
46. What is jet lag associated with?
A. Psychological change. B. Physiological change.
C. Inexperience of rapid travel. D. Unfamiliar environment.
47. What helps us to adjust to a 24-hour rhythm?
A. Alarm clock. B. Suprachiasmatic nucleus in our brain.
C. Signals from outside of the body. D. Our senses and stomachs.
48. What do we know from the fifth paragraph?
A. A person moving to a different time zone will suffer from high blood pressure.
B. A person moving to a different time zone will sweat a lot.
C. Moving to a different time zone will affect both palm sweat and blood pressure.
D. If the rhythm of blood pressure and palm sweat are not in step, there will be jet lag.
49. What should we do if we want to stay awake?
A. To take coffee at three o’clock in the afternoon.
B. To have meals that contain lots of protein.
C. To have some carbohydrate drinks.
D. To stop putting food into our stomach.
50. How can we cure jet lag?
A. To sleep for days. B. To wait for self-recovery.
C. To drink tea. D. To get something to eat.
高三英语阅读理解简单题查看答案及解析
There are three main classes of drugs, ________ has a different effect on the body.
A. each of them B. all of them
C. each of which D. all of which
高三英语单项填空中等难度题查看答案及解析
阅读理解。
Based on new analysis, we are rapidly approaching major climate change and the effects on society and the environment could be quite severe.Geographers predict that within the next eighty years, current world climate zones could shift and some could completely disappear.Polar regions will get colder while tropical regions will get even hotter，forcing animals to migrate(迁徙) north.
Climate changes like these could lead to the spread of diseases.Tropical storms and hurricanes will not only increase but may also become more intense.If the changes come too quickly, animal and plant species may not be able to adapt fast enough and could disappear.
According to Science Daily, a new study predicts that by the year 2100，many of today's familiar climates will be replaced by climates unknown in today's world.It is urgent that we reduce the risks of these farreaching consequences for the whole world.The planet itself has been showing signs of change.In 2004, a serious tsunami created by a major earthquake killed thousands in Sumatra and in 2008, thousands died in China because of another severe earthquake.Egypt was hit in 2009 with a major earthquake and Haiti was devastated in 2010 by yet another massive earthquake.
Within just the last few months, new reports from around the world have been coming in and most agree that our climate situation is much worse than previously thought.At this point, it doesn't matter what is causing it, but rather, what can be done about it.What's more, our world is getting more and more unstable every year.There is war and threat of war everywhere.Natural disasters are becoming more frequent and serious.
However, other planets are experiencing global warming as well as our own and some scientists believe there may be some connection between this.No one knows anything for sure at this point because there is simply not enough data.
1.What is the major function of Paragraph 1?
A．To arouse the reader's concern.
B．To introduce the theme of the whole passage.
C．To summarize the whole passage.
D．To state how climate changes.
2.What is the author's purpose in using the examples of earthquakes?
A．To show major changes are taking place on the planet.
B．To remind people to prevent future earthquakes.
C．To show the damage earthquakes caused.
D．To tell us more earthquakes will happen in the future.
3.Which of the following is NOT true of climate changes' effects?
A．Animal and plant species may not be able to adapt fast enough and could disappear.
B．It could lead to the spread of diseases.
C．Current world climate zones could shift and completely disappear.
D．Natural disasters are becoming more frequent and serious.
4.What can be inferred from the passage?
A．Animals and plants won't die out as long as climate changes slowly.
B．There's enough data for us to predict the future of climate change.
C．The world is getting more unstable because of animal migration.
D．The earth is not the only planet that is experiencing climate change.
高三英语阅读理解中等难度题查看答案及解析
E
Speaking two languages can actually help offset(抵消) some effects of aging on the brain, a new study has found,
Researchers tested how long it took participants to switch from one cognitive(认知的) task to another, something that-s known to take longer for older adults, said lead researcher, Brian Gold, a neuroscientist at the University of Kentucky.
Gold’s team compared task-switching speeds for younger and older adults, knowing they would find slower speeds in the older population because of previous studies. However, they found that older adults who spoke two languages were able to switch mental activities faster than those didn’t . The study only looked at life long bilinguals(会说两种语言的人) defined in study as people speaking a second language daily since they were at least 10 years old.
Gold and his team asked 30 people, either bilingual or monolingual(只僮一种语言 人) , to have a series of tests. They found that bilingual people were not only able to switch tasks faster they had different brain activity than their monolingual peers.
Kristina called bilingualism "a beautiful natural experiment”, because people grow up speaking two languages,and studies have shown that they get certain cognitive benefits from switching between languages and determining which to respond with based on what's going on around them.
Gold said he grew up in Montreal, where he spoke French at school and English at home, prompting relatives to question whether his French language immersion would somehow hinder his ability to learn English.
"Until very recently, learning a second language in childhood was thought of as dangerous," he said. "Actually, it's beneficial. "
1.What-s the main idea of the passage?
A. Researchers found that speaking two languages is important.
B. Researchers found that bilingual people respond slowly.
C. Researchers found that bilingual people can slow down the speed or aging on the brain and respond fast.
D. Researchers found that bilingual people are great.
2.Which of the following is TRUE according to the passage?
A. Older bilinguals can-t respond faster in mind.
B. Older adults speaking a second language daily since they were at least 10 years old can respond faster than those who don't
C. Young bilinguals can respond faster in mind than those monolinguals.
D. Bilingual children respond slower in mind than those monolinguals.
3.Kristina called bilingualism "a beautif'ul natural experiment" because
A. people grow up, benefiting from speaking two languages
B. people speaking two languages are natural
C. people speaking two languages are beautiful
D. people speaking two languages like the experiment
4.We can learn from the last paragraph that learning a second language in childhood is________
A. dangerous to children
B. not beneficial to children
C.dangerous but beneficial to children
D. not dangerous but beneficial to children
高三英语阅读理解中等难度题查看答案及解析
Speaking two languages can actually help reduce some effects of aging on the brain, a new study has found.
Researchers tested how long participants needed to _______ from one cognitive (认知) task to another, something that’s known to _______ longer for older adults, said lead researcher, Brain Gold, an expert at the University of Kentucky, “It has great effects these days because our population is _______ gradually,” Gold said. “Seniors are _______ longer, and that’s a good thing, but it’s only a good thing _______ a certain degree that their brains are _______.”
Gold’s team compared task-switching of younger and older _______, knowing they would find slower speeds in the _______ population because of previous studies. _______, they found that older adults who spoke two languages were able to switch mental gear (齿轮) ________ than those who didn’t.
First, Gold and his team ________ 30 people, who were either bilingual (双语的) ________ monolingual (单语的), to look at a series of colored shapes and ________ with the name of each shape by pushing a button. Then, they ________ the participants with a similar series of colored shapes and asked them to respond with what ________ the shapes were by pushing a button. The bilingual people had the ________ to respond faster to the shifting prompts (提示).
Researchers then gathered 80 more people for a second ________; 40 bilinguals and 40 monolinguals. This time, researchers used FMRI machines to ________ brain activity during the same shape-and color-identifying ________. Gold and his team found that bilingual people had different brain activity than their monolingual peers.
“Learning a second language in childhood was thought of as ________,” Gold said. “Actually, it’s beneficial.”
1.A. switch B. perform C. jump D. transport
2.A. hold B. spend C. last D. take
3.A. increasing B. aging C. growing D. exploding
4.A. surviving B. staying C. living D. expecting
5.A. with B. in C. at D. to
6.A. powerful B. healthy C. sensitive D. special
7.A. adults B. researchers C. leaders D. seniors
8.A. random B. ordinary C. older D. younger
9.A. Thus B. Otherwise C. Besides D. However
10.A. faster B. slower C. longer D. better
11.A. paid B. asked C. promised D. forced
12.A. yet B. nor C. or D. and
13.A. remember B. realize C. recall D. reply
14.A. presented B. rewarded C. assisted D. treated
15.A. forms B. types C. colors D. sizes
16.A. right B. ability C. opportunity D. determination
17.A. experiment B. conclusion C. lesson D. task
18.A. recognize B. improve C. make D. record
19.A. tools B. scores C. tasks D. games
20.A. useless B. reasonable C. simple D. interesting
高三英语完形填空困难题查看答案及解析
The harmful effects that smog can have on people's health are one of the top ______ of those who live in some cities.
A.concerns B.conflicts
C.characters D.charges
高三英语单项填空中等难度题查看答案及解析
A huge amount of oil was on the road, the effects of________ are not clear．
A． it B． that C． which D． whom
高三英语单项填空困难题查看答案及解析
When it ______ research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
A. refers to B. related to C. comes to D. talks to
高三英语单项填空中等难度题查看答案及解析
When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
A. that B. it C. this D. what
高三英语单项填空简单题查看答案及解析
With eco-tourism on the rise, eco-hotels are fast becoming the darling of the travel industry. These days, however, staying at an eco-hotel doesn’t necessarily mean vacationing in a tree house in the Costa Rican jungle, although that is certainly a choice.
The majority of eco-hotels fall into several categories: hotels and resorts that conserve ecologically important habitats; “green” hotels that reduce, recycle, minimize waste, and protect water; sustainable hotels that harvest food from gardens on the hotel property or get part or all of their power from renewable energy; hotels that encourage community involvement such as guests taking part in trail clearing; and hotels that offer some form of environmental education to their guests.
As such, eco-hotels are a various group. Stylish urban hotels like the Willard Inter-Continental Washington focus on energy conservation whereas the Rosario Resort & Spa on Orcas Island in Washington State offers a wildly popular “green” vacation package where guests can “take a hike, clear a trail”.
No matter what you call them, eco-hotel, eco-lodge, eco-resort, or green hotel, they’re all part of the “greening” of the tourism industry.
Part of what drives this greening of the hotel industry is no doubt competition. Going green is another way to distinguish a hotel from the mass of other excellent hotels that consumers have to choose from. But for many hotels, it’s also part of their philosophy. With the concept of “going green” firmly rooted in consumers’ minds, eco-hotels have taken it to the next level, and whether or not money is the driving factor behind the greening of the hotel industry doesn’t matter so much as it’s good for the planet.
1.According to the passage, which of the following can match the idea of eco-hotel?
A．It is comfortable and fashionable. B．It uses renewable energy.
C．It has walls of glass. D．It is home to endangered species.
2.From the passage, we know the Rosario Resort & Spa is a kind of hotel that _______.
A．encourages its guests to participate in its greening activities
B．harvests food from its own garden
C．has courses on the environment for its guests
D．protects important habitats
3.From the last paragraph, we can infer that _______.
A．money is the driving force behind eco-hotels
B．the hotel industry cares more about money than the environment
C．eco-hotels teach their guests the philosophy of eco-hotels
D．eco-hotels have no advantages in competing for guests
高三英语阅读理解中等难度题查看答案及解析