Our body clock,or natural body rhythm,influences our energy and alertness.Paying attention to it can help us choose the suitable time of day when we best perform specific tasks.
The reality,however,is that most of us organize their time around work demands,school deadlines,commuting or social events.Doing whatever your body feels like doing is a luxury in today's fast-paced modem society.
But that doesn't mean it isn't worth trying.Obeying our body clock has significant health benefits.Disrupting our natural body rhythm,on the other hand,has been linked to problems such as depression,obesity,or headache,says Steve Key,a biology professor.
When the body clock can synchronize(使……同步)the rhythms of its natural processes,it “gives us an advantage in daily life”,says Key.
According to him,when it comes to cognitive(認知的)work,most adults perform best in the late morning.As our body temperature starts to rise just before awakening in the morning and continues to increase until midday,our memory,alertness and concentration gradually improve.
However,he adds,our ability to concentrate typically starts to decrease soon thereafter.Most of us are more easily distracted(分心)between noon and 4 pm.
Alertness also tends to fall after eating a meal and sleepiness tends to peak around 2 pm,making that a good time for a nap.
Surprisingly, tiredness may increase our creative powers.For most adults,problems that require open ended thinking are often best dealt with in the evening when they are tired, according to a study in the journal Thinking & Reasoning.
When choosing a time of day to exercise,paying attention to your body clock can improve results.Physical performance is usually best from about 3 to 6 pm,says Michael Smolensky,a professor of biomedical engineering.
Of course, not everyone's body clock is the same,making it even harder to synchronize natural rhythms with daily plans.
【小題1】If we know our natural body rhythm well, we can         

A.find out the suitable time to do specific tasks
B.organize our time around work demands
C.do whatever our body feels like doing
D.be sure to be healthy
【小題2】Which of the following is NOT true?
A.Our alertness is influenced by our natural body rhythm
B.Doing whatever your body feels like is very difficult in our modem society.
C.Obeying our body clock is good for our health.
D.Disrupting our natural body rhythm can lead to obesity.
【小題3】According to Steve Key,which of the following is NOT true?
A.When our body clock synchronizes the rhythms of its natural processes,we can do better.
B.When it comes to cognitive(認知的)work,most people perform best in the late morning.
C.As body temperature rises before awakening in the morning,our concentration gradually improves.
D.We concentrate better in the late morning than between noon and 4 pm.
【小題4】Inspiration(靈感)to solve a difficult problem will most probably come to us     
A.when we get up in the morning
B.when we are tired in the evening
C.when we are full of energy in the late morning
D.when we are asleep at night
【小題5】Which of the following can be the suitable title for the passage?
A.What is natural body rhythm?
B.Natural body rhythm is good for us.
C.Something about natural body rhythm.
D.The latest research about natural body rhythm.


【小題1】A
【小題2】D
【小題3】B
【小題4】B
【小題5】C

解析試題分析:人體生物鐘的存在對我們來說有著極重要的意義,如果外界環(huán)境變化干擾了時鐘的正常運轉,造成了人體器官內部節(jié)奏的紊亂,會引起某些疾;而如果能夠合理利用生物鐘的規(guī)律人們就能高效地完成某些任務。
【小題1】A。細節(jié)理解題。從文章首段Paying attention to it can help us choose the suitable time of day when we best perform specific tasks可知答案選A。
【小題2】D。細節(jié)理解題。根據(jù)文章第二段Disrupting our natural body rhythm,on the other hand,has been linked to problems such as depression,obesity,or headache,可知打亂人體自然的生物鐘可能會導致抑郁,肥胖等問題,故答案選D。
【小題3】B。細節(jié)理解題。根據(jù)文章第四段內容According to him,when it comes to cognitive(認知的)work,most adults perform best in the late morning.可知研究人員認為大多數(shù)成年人在上午的晚些時候從事認知性工作時表現(xiàn)會更佳,故B選項內容錯誤。
【小題4】B。細節(jié)理解題。從文章倒數(shù)第三段內容Surprisingly, tiredness may increase our creative powers.For most adults,problems that require open ended thinking are often best dealt with in the evening when they are tired可知靈感往往在人們疲倦的下午或傍晚出現(xiàn),故答案選B。
【小題5】C。主旨大意題。文章開頭提出人們要注意人體的生物鐘以便能更好的選對我們做某些特殊工作的最佳時間,然后在下文對此進行詳細講述,由此判斷文章中心內容就是關于生物鐘的,故C選項內容更能體現(xiàn)文章中心,答案選C。
考點:考查社會知識類短文閱讀。

練習冊系列答案
相關習題

科目:高中英語 來源: 題型:閱讀理解

At first sight the planet Mars(火星)does not appear very welcoming to any kind of life. It has very little oxygen and water, the temperature at night is below 50 degrees and winds of 100 miles(161 kilometers)per hour cause severe dust storms. However, the surface of the planet seems to show that water flowed across it at some time in the past, and it is believed that there would be enough ice at the poles to cover the planet with water if it melted. Although there is no life on the Mars now, some scientists think there may have been some form of life a long time ago. At that time, the planet had active volcanoes(火山); the atmosphere was thicker and warmer; and there was water. In fact, in some ways the Mars may have been similar to the Earth, where life exists.

Some people believe that the Mars could support life in the future if the right conditions were produced. The first step would be to warm the planet using certain gases which trap the Sun’s heat in the planet’s atmosphere. With warmth, water and carbon dioxide, simple plants could begin to grow. These plants could slowly make the Mars fit to live on. It is judged that the whole process might take between
100, 000 and 200, 000 years. In the meantime, people could begin to live on the planet in a special closed environment. They would provide a lot of useful information about conditions on the Mars and the problems connected with living there.
【小題1】 According to the passage, the planet Mars has no   on it.

A.winds B.dust
C.mountains D.a(chǎn)nimals
【小題2】It is believed that on the Mars now   .
A.there is a large amount of ice at the poles
B.there is a thicker and warmer atmosphere
C.there are some kinds of simple plants
D.there are many active volcanoes
【小題3】 What is the topic of Paragraph 2?
A.Certain gases should be used to warm the Mars.
B.Plants should be grown to make the Mars fit to live on.
C.The Mars could support life on right conditions in the future.
D.People could live on the Mars in a special closed environment.
【小題4】 The most suitable title for the passage is   .
A.No Life on the Mars
B.Study of the Mars
C.The Possibility of Life on the Mars
D.Future Conditions on the Mars

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Butterflies are some of the most fascinating and beautiful insects in the world. Adult butterflies will live about 2 to 4 weeks. They use their senses of sight, touch, hearing, smell, and taste to survive in the world, find food and mates, lay eggs in an appropriate place, migrate, and avoid hungry enemies.
Butterflies have large compound eyes, which allow them to see in all directions without turning their heads. Like most insects, butterflies are very near­sighted, so they are more attracted to a sea of flowers than individual plants. Butterflies do not “see” colors such as red, green, and yellow, but they can sense sunlight, which indicates the direction the sun is shining, as well as ultraviolet light, which is present on many flowers and guides butterflies to honey sources.
Butterflies have a very well-developed sense of smell, but it is not in their nose, since they don't have one. Sense receptors are located in their antennae, feet, and many other parts of the body. They can help butterflies find their favorite flower honey food, and mates.
Butterflies' feet have sense organs that can taste the sugar in flower honey, letting the butterflies know if something is good to eat or not. Some females also carefully choose host plants by tasting to find appropriate places to lay their eggs. Adult butterflies feed their babies using a long tube. Butterflies force blood into the tube to straighten it out, allowing them to feed. Butterflies get all their food from this tube.
Butterflies don't have ears. Instead they “hear” sounds through their wings by sensing changes in sound vibrations.
Butterflies may possess senses we don't even know about yet, because their body structure is very different from ours, and therefore difficult to understand, when observed through our own human senses.
【小題1】The text mainly focuses on ________.

A.butterflies' living habits B.butterflies' beauty 
C.butterflies' senses D.butterflies' daily activities 
【小題2】What can we learn from the 2nd paragraph?
A.Butterflies can see in all directions and don't need to turn heads. 
B.Butterflies have good eyesight. 
C.Butterflies are sensitive to bright colors including red and yellow. 
D.Butterflies cannot sense the ultraviolet light. 
【小題3】Why do female adult butterflies carefully choose the host plants?
A.To find high­qualified honey. 
B.To have a good place for living. 
C.To make it easier for them to hide from the enemies. 
D.To find a proper place for their eggs. 

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Where do you find out about the world’s longest walk? The world's tallest man? The world's oldest woman? You know the answer, of course. It is the Guinness Book of World Records. How would people find such unusual facts without this book?
Guinness Book did not exist until 1951. Here is what happened. The managing director of Guinness Brewery was a curious man. He wanted answers to some questions about records. For example, he wanted to know what was the fastest flying game bird in Europe. But he was frustrated. There was no book to answer questions like this.
The director, Sir Hugh Beaver, contacted the McWhirter twins. They were brothers who owned a research agency. He asked them to put together a new reference book. It would include all kinds of unusual records. The brothers quickly accepted. The first edition of their book was published in 1955. Soon the Guinness Book of World Records was a best seller. It has sold more copies than any book except the Bible. A new edition is published every year.
Where do all the book's records come from? They are a combination of things like natural wonders, sports records, and stunts(特技) (How many people would push an egg with their noses if they weren’t trying to get to the book?). But the editors try to keep things honest. All records must be verified by an investigator. Only then are they printed.
The Guinness Book is a big business. It is published in dozens of languages. There are TV shows and museums. It is proof of how interested people are in strange pieces of information.
【小題1】The passage is mostly about _____.

A.the McWhirter twins
B.the director Sir Hugh Beaver
C.unusual records in the Guinness Book
D.a(chǎn) history of the Guinness Book
【小題2】The Guinness Book _____.
A.is a best seller
B.is published only in English
C.does not always check its records
D.has a full-length movie based on it
【小題3】It is clear from the passage that the McWhirter twins _____.
A.wanted to publish the book so that they set up a research agency
B.owned so good a research agency that they liked to help others
C.recognizes that Sir Hugh's idea for a book was a good one
D.wanted to know the answers to some questions about records
【小題4】In this passage, the underlined word "verified" means _____.
A.questionedB.proved the truthC.written upD.blocked

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Can dogs and cats get along well in the same home? People who are thinking about getting a dog as a friend for their cat are worried that they will fight. A recent research has found that if the cat is taken back home before the dog, and if they are introduced when still young (less than 6 months for cats, a year for dogs), it is highly probable that the two pets will get along swimmingly. In two-thirds of the homes cats and dogs have a good relationship.
However, it wasn’t all sweetness and light. There was a reported coldness between the cat and dog in 25% of the homes, while aggression(侵略,好斗) and fighting were found in 10% of the homes. One reason for this is probably that some of their body languages are just different. For example, when a cat turns its head away it means aggression, while a dog doing the same means submission(順從).
In homes with cats and dogs living peacefully, researchers found a surprising behavior. They are learning how to talk each other’s language. It is a surprise that cats can learn how to talk “Dog”, and dogs can learn how to talk “Cat”.
What’s interesting is that both cats and dogs have appeared to become smarter. They can learn to read each other’s body languages, suggesting that the two may have more in common than was expected. Once familiar with each other’s body language, cats and dogs can play together, and enjoy sleeping together on the sofa.
The importance of this research on cats and dogs may go beyond pets — to people who don’t get along well, including neighbors, colleagues at work, and even countries. If cats and dogs can learn to get along, surely people have a good chance.
【小題1】Some cats and dogs may fight when ________.

A.they are cold to each other
B.they look away from each other
C.they misunderstand each other’s body languages
D.they are introduced at an early age
【小題2】What is found surprising about cats and dogs?
A.They eat and sleep together.
B.They watch each other’s behaviors.
C.They learn to speak each other’s language.
D.They know something from each other’s voices.
【小題3】It is suggested in Paragraph 4 that cats and dogs ________.
A.have common interests
B.a(chǎn)re less different than was thought
C.have a common body language
D.a(chǎn)re not so smart as was expected
【小題4】What can we human beings learn from cats and dogs?
A.We should learn to get along well with others.
B.We should know more about animals.
C.We should live in peace with animals.
D.We should learn more body languages.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

“Enough” with the multivitamins already. That’s the message from experts behind three new studies that tackled an often debated question: Do daily multivitamins多種維生素make you healthier?
“We believe that the case is closed - supplementing(補充) the diet of well-nourished adults with (most) mineral or vitamin supplements has no clear benefit and might even be harmful,” concluded the authors of the editorial summarizing the new research papers. They urge consumers to not ‘waste’ their money on multivitamins. “The ‘stop wasting your money’ means that perhaps you’re spending money on things that won’t protect you long term,” editorial co-author, Dr. Edgar Miller said, “What will protect you is if you spend the money on fruits, vegetables, nuts, beans, low fat dairy, and things like that. Exercising would probably be a better use of the money.”
The strong message was based on a review of the findings from three studies that tracked multivitamins link to cancer protection, heart health, and brain and cognitive(認知的) measures. The first study looked at vitamin supplementation’s role in preventing chronic(慢性的) disease. The next study looked at whether long-term use of multivitamins would have any effect on slowing cognitive decline. The third study looked specifically at multivitamins and minerals role in preventing heart attack. “The three studies found no difference in rates of chronic disease, heart attack and the need for hospitalization between vitamin-takers and placebo(安慰劑)-takers.” Dr. Edgar Miller stated.
One expert agreed some nutrient-deficient people may still benefit from multivitamins. “There might be an argument to continue taking a multi(vitamin) to replace or supplement your not healthy diet,” Dr. Edgar Miller added. He also notes that vitamins can benefit people with celiac disease and those who are pregnant.
【小題1】This text is likely to be selected from a book of           .

A.medicineB.educationC.foodD.business
【小題2】Which of the following is NOT Dr. Edgar Miller’s opinion according to the passage?
A.Vitamins should not be used for chronic disease prevention. Enough is enough.
B.Having a balanced diet and exercising would probably be a better way to keep healthy.
C.The three studies do not provide support for use of multivitamin supplements.
D.Taking vitamins to replace or supplement your healthy diet is necessary.
【小題3】What can be inferred from the text?
A.Vitamin supplements have proved harmful to the health of adults.
B.Vitamin supplements are beneficial in certain conditions.
C.Nowadays taking vitamin supplements is common to most people.
D.Daily multivitamins will make you healthier.
【小題4】The author’s purpose of writing the text is most likely to___________.        .
A.persuadeB.describeC.informD.instruct

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Pilling a cat can be a 'terrible” experience. Cats don’t want something pushed down their throats, and they’ll fight with all their strength to prevent it. In fact, it’s amazing how powerful their small bodies can be.
The easiest way of pilling a cat is to press the pill into powder. Then mix the powder with a small amount of wet food. If your cat usually eats dry food, she will probably view the wet food as a treat and eat it up.
If your cat won’t eat the wet food that contains the pill or if she is too ill to eat, you can get a “pill gun”. There are some basic instructions. Getting your cat’s mouth to open is going to be the most difficult part. First, be sure the pill is in a handy place. Then you can put your cat on a bookshelf with her bottom in a corner or you can put her on your lap firmly tied. Have your cat facing to the right if you’re right-handed. With your left hand, hold your cat at the cheekbones, putting your palm (手掌) at the top of her head. Keeping your finger off the trigger (扳機), with your right hand, Insert the pill gun until the pill is positioned over the tongue and open throat Be sure to give your cat a treat directly after giving the pill.
If you don’t feel comfortable using a pill gun, you can try giving the pill by hand. Push your cat’s head backwards just far enough so that her nose is pointing towards the ceiling. At this point, most cats will slightly open their mouths. With the little finger or ring finger of the hand holding the pill, open the bottom jaw a little more. You may need to hold her top jaw with your other hand while doing this. Aim straight and lightly throw the pill or drop it. Most cats will then swallow the pill.
【小題1】Pilling a cat can be a terrible experience because cats ______.

A.a(chǎn)re amazingly powerful and dangerous
B.may fight with all their strength against pills
C.refuse something pressed down their throats
D.a(chǎn)re difficult to treat once they’ve got ill
【小題2】Which of the following statements is true according to the second paragraph?
A.Wet food with medicine is usually a treat to cats.
B.Cats used to dry food must reject wet food.
C.The easiest pilling is to press the pill into powder.
D.Cats arc most likely interested in something new.
【小題3】Using a “pill gun”, you had better hold your cat ______ if you’re left-handed.
A.facing to the right B.with your right hand
C.a(chǎn)t the head D.on your lap firmly
【小題4】A cat probably opens its mouth naturally when ______.
A.its nose is straight upwards B.it is touched by fingers
C.its head is turning around D.it is served with its favorite pills

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Almost every machine with moving parts has wheels,yet no one knows exactly when the first wheel was invented or what it was used for.We do know,however,that they existed over 5,500 years ago in ancient Asia.
The oldest known transport wheel was discovered in 2002 in Slovenia.It is over 5,100 years old.Evidence suggests that wheels for transport didn’t become popular for a while,though.This could be because animals did a perfectly good job of carrying farming tools and humans around.
But it could also be because of a difficult situation.While wheels need to roll on smooth surfaces,roads with smooth surfaces weren’t going to be constructed until there was plenty of demand for them.Eventually,road surfaces did become smoother,but this difficult situation appeared again a few centuries later.There had been no important changes in wheel and vehicle design before the arrival of modern road design.
In the mid­1700s,a Frenchman came up with a new design of road—a base layer(層) of large stones covered with a thin layer of smaller stones.A Scotsman improved on this design in the 1820s and a strong,lasting road surface became a reality.At around the same time,metal hubs (the central part of a wheel)came into being,followed by the pneumatic tyre(充氣輪胎) in 1846.Alloy wheels were invented in 1967,sixty years after the appearance of tarmacked roads(柏油路).As wheel design took off,vehicles got faster and faster.                          (2013·重慶,C)
【小題1】What might explain why transport wheels didn’t become popular for some time?

A.Few knew how to use transport wheels.
B.Humans carried farming tools just as well.
C.Animals were a good means of transport.
D.The existence of transport wheels was not known.
【小題2】What do we know about road design from the passage?
A.It was easier than wheel design.
B.It improved after big changes in vehicle design.
C.It was promoted by fast­moving vehicles.
D.It provided conditions for wheel design to develop.
【小題3】How is the last paragraph mainly developed?
A.By giving examples.
B.By making comparisons.
C.By following time order.
D.By making classifications.
【小題4】What is the passage mainly about?
A.The beginning of road design.
B.The development of transport wheels.
C.The history of public transport.
D.The invention of fast­moving vehicles.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Cloud seeding is a method of artificially causing clouds to produce precipitation (降水) in the form of rain or snow.Cloud seeding has also been used in attempts to modify the severity of hail storms and hurricanes.The effectiveness of cloud seeding remains controversial (有爭議的).but it continues to be used in some regions to try to increase rainfall for agriculture and to build snow packs for water supplies and power production.
Cloud seeding was developed by American scientists Irving Langmuir and Vincent Joseph Schaefer during and after World War II.Their work began as an effort to learn more about the buildup of ice on airplane wings, and eventually led them to attempt to create rainfall by releasing several pounds of crushed frozen carbon dioxide into a cloud from an airplane.In this form, the carbon dioxide is called dry ice.On November 13, 1946, the technique appeared to produce snow directly under the cloud; the snow then turned to rain as it fell to the ground.
For their experiment, Langmuir and Schaefer selected a supercooled cloud, one in which the water droplets remain liquid in subfreezing temperatures.Their theory was that small grains of dry ice falling through the cloud would cause tiny droplets of water vapor in the cloud to freeze into crystals that attracted more water vapor.Their theory proved to be correct and eventually the crystals became heavy enough to fall from the cloud as snow.As the snow reached the warmer temperatures closer to the ground, it melted and became rain.
Another scientist, Bernard Vonnegut, produced a method of cloud seeding using silver iodide (碘化銀).He used particles of silver iodide because its crystal structure resembled that of ice in clouds.Silver
iodide also had practical advantages over frozen carbon dioxide It could be stored at room temperature
and did not require an airplane as a delivery mechanism.Instead, silver iodide crystals could be fired by
cannons (大炮) high into the air, where wind carried them into the clouds.
【小題1】According to the text, Langmuir and Schaefer had intended to deal with__
A.how to freeze carbon dioxide                      
B.how to remove ice on plane wings
C.how to make weather forecast for the war             
D how to hide planes in clouds at war
【小題2】What is the CORRECT order of the course for cloud seeding with dry ice?
a.snow becoming rain in wanner temperatures             b.crystals attracting more water vapor
c.crystals falling in the form of snow                     d.crystals becoming very heavy
e.freezing tiny droplets of water vapor into crystals
f.putting small grains of dry ice in the cloud

A.a(chǎn)-c-f-d-b-e B.b-f-e-a-c-d
C.f-e-b-d-c-a D.e-a-d-c-b-f
【小題3】Bernard chose silver iodide as a method of cloud seeding because___.
A.it is much cheaper than dry ice B.it can be stored at any rooms
C.it can be sent into clouds by wind D.it is similar
【小題4】The best title for the passage may be "____".
A.Cloud Seeding
B.Artificial Raining
C.Weather Changing
D.Cloud Gathering
【小題5】How many methods of cloud seeding are mentioned in the passage?
A.three B.two C.one D.four

查看答案和解析>>

同步練習冊答案