Yawning sends out certain messages---either “Oh, this movie is boring”or I probably need to get some sleep”. But did you know that a yawn can also help your brain to cool down when it is so overheated?
A new study, led by a research team of Princeton University, has indicated that yawning could be the brain’s natural way of regulating temperature. People yawn more often when the temperature outdoors is lower than their body temperature but are less likely to yawn when it is hotter outdoors, according to Sciencedaily.com.
The research team did an experiment on 160 people , 80 in summer and 80 in summer and 80 in winter, to examine how often they yawned at different air temperatures. The study found that people yawned more often in winter than in summer. Scientists say that when the air temperature is lower outside the body, there is heat exchange between the overheated brain and the cool air. But when the air temperature is higher than or equal to the body, people are less likely to yawn because the hot air they breathe in will make the brain even hotter.
When people yawn, their jaw is also stretched, which increases blood flow and may also help cool the brain.
The study showed that the amount someone yawned could be related to the amount of time they spent outside. The longer they spent outside in summer, the less they yawn. Nearly 40 percent of participants yawned within their first five minutes outside, but after that the percentage was reduced to less than 10 percent.
However, the result was the opposite in winter. The number of people who yawned increased when they spent more than five minutes outdoors. But the change was only slight compared to summertime.
According to Gallup, this is the first report to show that yawning frequencies change depending on season. This could help us to understand better the way our brains work. It may also help us understand the reason why frequent yawning can sometimes be a sign of brain disease.
小題1:The purpose of the experiment is ________.
A．to prove people yawn in winter and in summer equally.
B．to indicate brain can regulate temperature naturally
C．to find the frequency of people’s yawning
D．to show the real reason why people yawn
小題2:The information we get from Paragraph 5 and 6 is that_______
A．longer outdoor summertime results in more yawns.
B．yawning frequency changes with outdoor time
C．yawning frequency increases with outdoor time
D．longer outdoor wintertime leads to fewer yawns
小題3:According to the text, people yawn more often________.
A．when the air temperature is lower outside the body
B．when the hot air breathed in makes the brain hotter
C．when the air temperature is higher than the body
D．when the air temperature is equal to the body.
小題4:What could be the best title for the text?
A．Yawning is a Sign of Brain Disease
B．Yawning Carries Some Information
C．Yawning Benefits Your Body
D．Yawning Cools Your Brain

小題1:C
小題2:B
小題3:A
小題4:D

試題分析：文章介紹了一項研究結(jié)果，人們多長時間打一次哈欠，研究表明，當(dāng)外面的溫度比身體的溫度低的時候，人們就會打哈欠。打哈欠可以讓人的大腦冷靜下來。
小題1:細(xì)節(jié)題：從第三段的句子：The research team did an experiment on 160 people, 80 in summer and 80 in winter, to examine how often they yawned at different air temperatures. 可知這個研究的目的是看人們多長時間打一次哈欠，選C
小題2:細(xì)節(jié)題：從第五段的句子:The study showed that the amount someone yawned could be related to the amount of time they spent outside.可知人們打哈欠的時間和在戶外是時間有關(guān)，選 B
小題3:細(xì)節(jié)題：從第二段的句子：People yawn more often when the temperature outdoors is lower than their body temperature but are less likely to yawn when it is hotter outdoors, according to Sciencedaily. com.可知當(dāng)外面的溫度比身體的溫度低的時候，人們就會打哈欠。選A
小題4:標(biāo)題確定題：從第一段的句子：But did you know that a yawn can also help your brain to cool down when it is overheated?可知打哈欠可以讓人的大腦冷靜下來。選D
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：閱讀理解

One day, when I was a freshman in high school, I saw Kyle from my class walking home from school. It looked like he was carrying all of his books. I thought to myself, "Why would anyone bring home all his books on a Friday? He must really be a nerd (a foolish person)." I had quite a weekend planned, so I shrugged my shoulders and went on.
As I was walking, I saw a bunch of kids running towards him. They knocked all his books out of his arms and tripped(絆倒) him so he landed in the dirt. His glasses went flying, and I saw them land in the glass about ten feet from him. He looked up and I saw this terrible sadness in his eyes. So, I jogged over to him and as he crawled around looking for his glasses, I saw a tear in his eye.
As I handed him his glasses, I said, "Those guys are jerks. They really should go to hell." He looked at me and said, "Hey, thanks!" There was a big smile on his face. It was one of those smiles that showed real thankfulness. I asked him where he lived. As it turned out, he lived near me.
Over the next four years, Kyle and I became best friends. I teased him all the time about being a nerd. He had to prepare a speech for graduation. As he started his speech, he cleared his throat, and began. "Graduation is a time to thank those who helped you make it through those tough years. I am here to tell you a story."
I just looked at my friend with disbelief as he told the story of the first day we met. He had planned to kill himself over the weekend. He talked of how he had cleaned out his locker so his Mom wouldn't have to do it later and was carrying his stuff home. He looked hard at me and gave me a little smile. "Thankfully, I was saved. My friend saved me from doing the unspeakable."
I heard the gasp(倒吸氣) go through the crowd as this handsome, popular boy told us all about his weakest moment. I saw his Mom and Dad looking at me and smiling that same grateful smile. Not until that moment did I realize its depth.
小題1:Why did Kyle carry all his books home?
A．Because it was Friday.
B．Because he was a nerd.
C．Because he wanted to kill himself.
D．Because he liked doing things for his mother.
小題2:Which of the statements is TRUE according to the passage?
A．The bunch of kids attacked Kyle to have his glasses and books.
B．The author planned to study all weekend after he met Kyle.
C．The author was a freshman when Kyle gave the speech.
D．Kyle felt grateful to the author for his help.
小題3:What can we infer from the passage?
A．When Kyle couldn't find the glass, he turned to the author for help.
B．The author teased Kyle a lot about being a nerd.
C．The author didn't expect Kyle to tell the story.
D．Kyle thanked his parents first for saving his life.
小題4:What does the underlined "them" in the 2nd paragraph refer to?
A．The kids. B．Kyle's books. C．Kyle's glasses.D．Kyle's arms.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Is veg food healthier than non-veg food? I feel this is a very common topic that people speak on．Please give me your opinions on this topic．
Rao
12-18-08
So far as veg food is concerned, it is also proved to be a healthy and nutritious diet, but has very few items which can provide us with proteins, but if you see non-veg food like eggs, chicken, and many more, such foods have a large content of proteins in them.
Sai
12-19-08
Man basically is herbivorous（食草的）. If we look at the animal kingdom
We can see that all the herbivorous animals have the similar dental（牙齒的）
structure, which clearly shows that the human being also ought to be vegetarian by birth. It is only the living conditions that make man carnivorous（食肉的）.
The vegetarian foods are easily digestible.
Santos
12-20-08
Non-veg food items are better than veg items. A healthy person requires complete diet and veg + meat makes the diet complete. The only caution that needs to be taken is not to have non-veg items on a daily basis. Once in a week or couple of weeks will be best.
Krishna
01-03-09
When we eat non-veg, we are all veg by nature. The chicken that we eat feeds on grains, the mutton that we eat feeds on grass, and the fish that we eat feeds on simple plants. So non-veg food by logic（邏輯）is better and suited for hauman beings.
Khan
01-05-09
Non-veg food is equally important in our diet as it helps in many ways, especially fish and other seafood as fish contains omega 3 which makes our immune system（免疫系統(tǒng)）stronger. Do you know that most of the veg food put together does not contain as much omega 3 as fish alone contains!
小題1:According to Rao, what is the problem with veg food?
A．It damages our immune system.B．It has few nutrients.
C．It contains too much omega 3.D．It is lacking in protein.
小題2:In the opinion of Sai, humans are born vegetarian because humans        .
A．have the same teeth structure as plant-eating animals
B．believe that veg foods are good for their teeth
C．belong to the plant-eating animal family
D．can adapt to the living conditions like plant-eating animals
小題3:What advice is given by Santos?
A．To have a daily veg + meat diet.
B．Not to eat non-veg food every day.
C．To eat digestible food every day.
D．Not to eat food without protein.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Astronauts on shorter shuttle missions (使命) often work very long days.  Tasks are scheduled (安排) so tightly that break times are often used to finish the day’s work.  This type of schedule is far too demanding for long missions on the International Space Station (ISS).  ISS crewmembers usually live in space for at least a quarter of a year. They work five days on and two days off to mimic the normal way they do things on Earth as much as possible. Weekends give the crew valuable time to rest and do a few hours of housework.  They can communicate with family and friends by email, internet phone and through private video conferences.
While astronauts cannot go to a baseball game or a movie in orbit, there are many familiar activities that they can still enjoy. Before a mission, the family and friends of each ISS crewmember put together a collection of family photos, messages, videos and reading material for the astronauts to look at when they will be floating 370 kilometers above the Earth.  During their mission, the crew also receives care packages with CDs, books, magazines, photos and letters. And as from early 2010, the internet became available on the ISS , giving astronauts the chance to do some “web surfing（沖浪）” in their personal time. Besides relaxing with these more common entertainments, astronauts can simply enjoy the experience of living in space.
Many astronauts say that one of the most relaxing things to do in space is to look out the window and stare at the universe and the Earth’s vast land mass and oceans.
小題1:What does the word “mimic” in Paragraph 1 probably mean?
A． FindB． CopyC．ChangeD．Lose
小題2: Which of the following best describes the families of the astronauts on the ISS ?
A．They are caring and thoughtful.
B．They are patient and annoyed.
C．They are impatient and annoyed.
D．They are excited and curious.
小題3:In the final paragraph, the author shows that astronauts          .
A．get more pleasure in space than on the Earth
B．find living in space a bit boring and tiring
C．regard space life as common
D．love to see the Earth from space
小題4:The passage mainly discusses how astronauts          .
A．work for longer missions in space
B．connect with people on the Earth
C．observe the Earth from space.
D．spend their free time in space

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

For those who make journeys across the world, the speed of travel today has turned the countries into a series of villages. Distances between them appear no greater to a modern traveler than those which once faced men as they walked from village to village. Jet planes fly people from one end of the earth to the other, allowing them a freedom of movement undreamt of a hundred years ago.
Yet some people wonder if the revolution in travel has gone too far. A price has been paid, they say, for the conquest (征服) of time and distance. Travel is something to be enjoyed, not endured (忍受). The boat offers leisure and time enough to appreciate the ever-changing sights and sounds of a journey. A journey by train also has a special charm about it. Lakes and forests and wild, open plains sweeping past your carriage window create a grand view in which time and distance mean nothing. On board a plane, however, there is just the blank blue of the sky filling the narrow windows of the airplane. The soft lighting, in-flight films and gentle music make up the only world you know, and the hours progress slowly.
Then there is the time spent being ‘processed’ at a modern airport. People are conveyed like robots along walkways; baggage is weighed, tickets produced, examined and produced yet again before the passengers move to another waiting area. Journeys by rail and sea take longer, yes, but the hours devoted to being ‘processed’ at departure and arrival in airports are luckily absent. No wonder, then, that the modern high-speed trains are winning back passengers from the airlines.
Man, however, is now a world traveler and cannot turn his back on the airplane. The working lives of too many people depend upon it; whole new industries have been built around its design and operation. The holiday-maker, too, with limited time to spend, patiently endures the busy airports and the limited space of the flight to gain those extra hours and even days, relaxing in the sun. Speed controls people’s lives; time saved, in work or play, is the important thing—or so we are told. Perhaps those first horsemen, riding free across the wild, open plains, were enjoying a better world than the one we know today. They could travel at will, and the clock was not their master.
小題1: What does the writer try to express in Paragraph 1?
A．Travel by plane has speeded up the growth of villages.
B．Man has been fond of traveling rather than staying in one place.
C．The speed of modern travel has made distances relatively short.
D．The freedom of movement has helped people realize their dreams.
小題2:How does the writer support the underlined statement in Paragraph 2?
A．By giving examples.
B．By giving instructions.
C．By analyzing cause and effect.
D．By following the order of time.
小題3:According to Paragraph 3, passengers are turning back to modern high-speed trains because ______.
A．they pay less for the tickets
B．they feel safer during the travel
C．they can enjoy higher speed of travel
D．they don’t have to waste time being ‘processed’
小題4: What does the last sentence of the passage mean?
A．They could travel with their master.
B．They needed the clock to tell the time.
C．They preferred traveling on horseback.
D．They could enjoy free and relaxing travel.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Sure, it’s good to get along with your teacher because it makes the time you spend in the classroom more pleasant.
And yes, it’s good to get along with your teacher because, in general, it’s smart to learn how to relate to (理解)the different types of people you’ll meet throughout your life.
But really, there’s one super-important reason why you should get along with your teacher. When you do, “learning bursts right open,” says Evelyn Vuko, a longtime teacher who writes an education column（專欄） called “Teacher Says” for the Washington Post newspaper.
In fact, kids who get along with their teachers not only learn more, but they’re more comfortable asking questions and getting extra help. This makes it easier to understand new material and do your best on tests. When you have this kind of relationship with a teacher, he or she can be someone to turn to with problems, such as problems with learning or school issues, such as bullying(欺負(fù)人). 
As a kid in a primary or middle school, you’re at a wonderful stage in your life. You’re like a sponge(海綿), able to soak up lots of new and exciting information. On top of that, you’re able to think about all this information in new ways. Your teacher knows that, and in most cases, is very excited to be the person who’s giving you all that material and helping you put it together. Remember, teachers are people, too, and they feel great if you’re open to what they’re teaching you. That’s why they wanted to be teachers in the first place --- to teach!
Some kids may be able to learn in any situation, whether they like the teacher or not. But most kids are sensitive to the way they get along with the teacher, and if things aren’t going well, they won’t learn as well and won’t enjoy being in class.
小題1:The passage mainly talks about _____.
A．how to get along well with teachers
B．the importance of a good relation with teachers
C．how much the students are expected of to get along with teachers
D．how to make the time in the classroom more pleasant
小題2: “Learning bursts right open” in the third paragraph really means _____.
A．learning becomes easier for you at once　　　　　
B．you find an opening to learning　　　　　
C．there’ll be more problems with learning　　　　　
D．there’ll be no problems with learning.
小題3:According to the passage, which of the following statements is TRUE?
A．You are getting on well with your teachers, so you have more questions than others.
B．You find it comfortable to ask questions, so you can build a good relationship with teachers.
C．You have a good relationship with teacher, so you can turn to him/ her when in trouble.
D．You are in trouble, so you can build a good relationship with teachers.
小題4:Which of the comments is FALSE on teachers and their work according to the passage?
A．Teachers are excited even if you wouldn’t like to accept their teaching.
B．Teachers sometimes have the same feelings as students do.　　　　
C．Though few there are still some students who can learn even if they don’t like the teacher.　　
D．Having a bad relationship with your teachers does more or less harm to your studies.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

How often do you change your hairstyle or ask for new dresses? You may be __to follow trends in Western countries, but young people in the United States don’t care as much about__  as you do.
A recent survey among high school __ in China, Japan, South Korea and the US found that __ teenagers care more about their appearance than young people in the US.
This survey was held in 156 high schools in the four countries. More than 7,000 teenagers were__  about their views on life and the world. South Koreans, at 83 percent, cared most about their looks. They were __by the Chinese and Japanese, while US students showed the least interest in fashion at only 33 percent.
“The different results show __ of cultural background,” said Sun Yunxiao from the China Youth and Children Research Centre. He explained that in the US there are many different    of beauty, so teens are more __ to be confident about their appearance.
US teenagers’ high self-confidence is displayed in the __. About 85 percent are happy with themselves. The percentage of self-confident Chinese students stands at only 30 percent.
What’s  , US students showed more individuality, with 88 percent___  that “people should follow their own interests rather than   of others”. This is much   than South Korea’s 69 percent, China’s 49 and Japan’s 48.
Japanese students, at 52 percent, are most dissatisfied with modern society. Chinese and Koreans follow at second and_ most dissatisfied.
“ to the survey, Chinese students are happy and disciplined. They have a strong wish to make a difference.  __  Chinese students need to be more independent and learn how to relax,” said Sun.
The students have different  __  backgrounds. But home and places where friends gather are the favorite places all teens seek happiness.
Exams and worries about life after graduation cause much  _ _ among most of the teens ___ for the survey.
小題1:
A．a(chǎn)bsorbedB．willingC．carelessD．unhappy
小題2:
A．hairstyle B．dresses C．fashionD．culture
小題3:
A．teachersB．studentsC．citizensD．colleagues
小題4:
A．Asian B．AmericanC．AfricanD．Western
小題5:
A．a(chǎn)nsweredB．requestedC．persuadedD．questioned
小題6:
A．followedB．decreasedC．reducedD．compared
小題7:
A．relationsB．barriersC．customsD．differences
小題8:
A．a(chǎn)warenessB．standardsC．consciencesD．expenses
小題9:
A．a(chǎn)dmirableB．confusedC．likelyD．unbelievable
小題10:
A．surveyB．settingC．referenceD．paper
小題11:
A．worseB．betterC．lessD．more
小題12:
A．disagreeingB．observingC．a(chǎn)greeingD．puzzling
小題13:
A．thoseB．thatC．itD．one
小題14:
A．lowerB．largerC．smallerD．higher
小題15:
A．firstB．thirdC．fourthD．last
小題16:
A．leadingB．devotingC．a(chǎn)ppealingD．According
小題17:
A．ButB．AndC．SoD．Or
小題18:
A．politicalB．culturalC．economicalD．commercial
小題19:
A．expectationB．hesitationC．concernD．a(chǎn)mbition
小題20:
A．interviewedB．a(chǎn)dvisedC．overlookedD．invested

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

One effective way of destroying happiness is to look at something and focus on even the smallest fault. It’s like looking at the tiled（鋪瓦的）ceiling and concentrating on the space where one tile is     .
Once I heard a bald man said, “whenever I enter a room      I see is hair.” Once you’ve     what your missing tile is, explore whether acquiring it will     make you happy. Then do one of the three things: get it, replace it with a different     , or forget about it and      the tiles in your life that are not missing.
We all know people who have a relatively      life, yet are essentially unhappy. while people who have suffered a great deal but     remain happy.
The first      is gratitude. All happy people are      . Ungrateful people cannot be happy. We tend to think that being unhappy leads people to      , but it’s truer to say that complaining leads to people becoming unhappy.
The second secret is      that happiness is a byproduct of something else. The most obvious      are those pursuit that give our lives purpose — anything     studying insects to playing baseball. The more passions we have, the more happiness we are     to experience.
Finally, the belief that something permanent goes beyond us and that our     has some larger meaning can help us to feel happier. We       a spiritual faith, or a philosophy, it should     this truth: if you choose to find the  in every situation, you will be blessed, and if you choose to find the awful, you will be cursed. As with happiness itself, this is     your decision to make.
小題1:
A．differentB．missingC．shortD．broken
小題2:
A．nothingB．noneC．a(chǎn)llD．a(chǎn)nything
小題3:
A．determinedB．predictedC．a(chǎn)ssumedD．imagined
小題4:
A．completelyB．naturallyC．hopefullyD．really
小題5:
A．tileB．brickC．ceilingD．house
小題6:
A．look onB．focus onC．count onD．rely on
小題7:
A．peacefulB．difficultC．easyD．ordinary
小題8:
A．certainlyB．merelyC．hardlyD．generally
小題9:
A．secretB．factorC．ruleD．key
小題10:
A．wealthyB．gratefulC．proudD．generous
小題11:
A．upsetB．quarrelC．complainD．depress
小題12:
A．a(chǎn)dmittingB．a(chǎn)ssumingC．provingD．realizing
小題13:
A．sourcesB．resultsC．a(chǎn)nswersD．goals
小題14:
A．a(chǎn)mongB．fromC．throughD．for
小題15:
A．probableB．possibleC．likelyD．capable
小題16:
A．valueB．destinationC．survivalD．existence
小題17:
A．needB．lackC．demandD．expect
小題18:
A．involveB．includeC．a(chǎn)bsorbD．mean
小題19:
A．worstB．bestC．positiveD．negative
小題20:
A．a(chǎn)bsolutelyB．totallyC．exactlyD．largely

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Winners Club
You choose to be a winner！
The Winners Club is a bank account specially designed for teenagers. It has been made to help you better manage your money. The Winners Club is a transaction account（交易賬戶）where you receive a key-card so you can get to your money 24/7—that’s 24 hours a day, 7 days a week!
It’s a club with impressive features for teenagers：
No account keeping fees！
You’re no millionaire so we don’t expect you to pay large fees. In fact, there are no account keeping or transacting fees!
Excellent interest rates!
You want your money to grow. The Winners Club has a good rate of interest which gets even better if you make at least two deposits（儲蓄）without talking them out in a month.
Convenient
Teenagers are busy—we get that. You may never need to come to a bank at all. With the Winners Club you can choose to use handy tellers and to bank from home using the phone and the Internet. You can have money directly deposited into your Winners Club account. This could be your pocket money or your pay from your part-time job!
Mega magazine included
Along with your regular report, you will receive a FREE magazine full of good ideas to make even more of your money. There are also fantastic offers and competitions only for Winners Club members.
The Winners Club is a great choice for teenagers. And it is so easy to join. Simply fill in an application form. You will have to get permission from your parent or guardian (so we can organize that cool key-card) but it is easy. We can’t wait to hear from you. It’s the best way to choose to be a winner!
小題1: The Winners Club is a bank account intended for _________.
A．parentsB．teenagersC．winnersD．a(chǎn)dults
小題2: Which of the following is TRUE about the Winners Club？
A．Special gifts are ready for parents.
B．The bank opens only on work days.
C．Services are convenient for its members.
D．Fees are necessary for the account keeping.
小題3:If you want to be a member of the Club, you must _________.
A．be an Internet userB．be permitted by your parent
C．has a big sum of moneyD．be in your twenties
小題4:What is the purpose of this text?
A．To set up a club.B．To provide part-time jobs.
C．To organize key-cards.D．To introduce a new banking service.

查看答案和解析>>

同步練習(xí)冊答案