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Birds that are half-asleep — with one brain hemisphere (半球) alert(警觉) and the other sleeping — control which side of the brain remains awake, according to a new study of sleeping ducks.
Earlier studies have recorded half-brain sleep in a wide range of birds. The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves. The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere’s eye stays open and alert. Birds also can sleep with both hemispheres resting at once.
Decades of studies of bird groups led researchers to predict extra alertness in the end-of-the-row sleepers which tend to be attacked more easily. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze(注视) direction.
Also, birds napping (打盹) at the end of the line depend on single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Turning 16 birds through the positions in a four-duck row, the researchers found that compared with 12 percent for birds in inner spots, outer birds half-asleep during some 32 percent of napping time.
“We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness at the same time in different regions of the brain,” the researchers say.
The results provide the best evidence for a long-standing assumption that single-hemisphere sleep developed over time as creatures scanned for enemies. The preference for opening an eye on the lookout side could be widespread, he predicts. He’s seen it in a pair of birds napping side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror-side eye closed as if the reflection were a companion and the other eye stayed open.
Useful as half-sleeping might be, it’s only been found in birds and such water animals as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning.
Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds’ half-brain sleep “is just the tip of the iceberg.” He supposes that more examples may turn up when we take a closer look at other species.
1.
According to the passage, birds often half sleep because ______.
A.
they have to watch out for possible attacks
B.
their brain hemispheres take turns to rest
C.
the two halves of their brain are differently organized
D.
they have to constantly keep an eye on their companions
2.
What is implied about the example of a bird’s sleeping in front of a mirror?
A.
An imagined companion gives the bird a sense of security.
B.
Birds prefer to sleep in pairs for the sake of their security.
C.
The phenomenon of birds napping in pairs is widespread.
D.
A single pet bird enjoys seeing its own reflection in the mirror.
3.
It can be inferred that _______.
A.
Birds never sleep with both hemispheres resting at once.
B.
Inner ducks depend on single-hemisphere sleep, rather than total relaxation, as often as birds napping at the end of the line do
C.
It is not the first time for scientists to research on birds’ half-brain sleep
D.
Birds hardly sleep without a companion
4.
By saying “just the tip of the iceberg”, Siegel suggests that _______.
A.
half-brain sleep has something to do with icy weather
B.
the mystery of half-brain sleep is close to being solved
C.
most birds living in cold regions tend to be half sleepers
D.
half-brain sleep may exist among other species
Most Americans get what money they have from their work; that is, they earn an income from wages or salaries. The richest Americans, however, get most of their money from what they own — their stocks, bonds, real estate, and other forms of property, or wealth. Although there are few accurate statistics to go by, wealth in American society appears to be concentrated in very few hands. More than 20 percent of everything that can be privately owned is held by less than one percent of the adult population and more than 75 percent of all wealth is owned by 20 percent of American adults. The plain fact is that most Americans have no wealth at all aside from their homes, automobiles, and a small amount of savings.
Income in the United States is not as highly concentrated as wealth. In 1917 the richest 10 percent of American families received 26.1 percent of all income, while the poorest 10 percent received 17 percent, mainly from Social Security and other government payments. The most striking aspect of income distribution is that it has not changed significantly since the end of World War II. Although economic growth has roughly doubled real disposable (可自由使用的) family income (the money left after taxes and adjusted for inflation) over the last generation, the size of the shares given to the rich and the poor is about the same. By any measure economic inequality is great in the United States.
The reality behind these statistics is that a large number of Americans are poor. In 1918, 14 percent of the population was living below the federal government’s poverty line, which at that time was an annual income of $ 9 287 for a nonfarm family of two adults and two children. In other words, about one out of seven Americans over 31 million people was officially considered unable to buy the basic necessities of food, clothes, and shelter. The suggested poverty line in 1981 would have been an income of about $11, 200 for a family of four. By this relative definition, about 20 percent of the population or more than 45 million Americans are poor.
1.
What does the majority of the Americans have in terms of wealth?
A.
Their income and savings.
B.
Their house, cars and small amounts of savings.
C.
Everything they own in their homes.
D.
Actually, they have no wealth at all.
2.
What is the percentage of wealth that is in the hands of most Americans?
A.
Less than 25%.
B.
More than 25%.
C.
More than 75%.
D.
Less than 20%.
3.
Why is economic inequality still great in the US in spite of the economic growth?
A.
Because the economic growth has widened the gap of the family income between the rich and the poor.
B.
Because income in the US is still concentrated in the hands of the richest 10% of American families.
C.
Because the proportion of income received by the rich and the poor remains almost the same as in 1917.
D.
Because some Americans made great fortunes during the Second World War.
4.
What can we learn from comparison of the two poverty lines in the last paragraph?
A.
The poverty line of 1918 is more favorable to the poor than that of 1981.
B.
The 1981 line didn’t leave much to the poor.
C.
There were more Americans who were officially poor by the 1918 line.
D.
There were more Americans who were officially poor by the 1981 line.
5.
From the last two sentences we can see that 1981 government’s poverty line _______.
A.
was of no good for the poor
B.
was officially approved
C.
was not helpful to the poor
D.
was not put into operation then
FreeRice.com is a non-profit website run by the United Nations World Food Program (UNWFP). It aims to provide education to everyone for free and help end world hunger. Join us and have fun with our vocabulary game. For each vocabulary word you get right, we donate free rice through UNWFP to those hungry people.
How do you play the vocabulary game?
Click on the answer that is closest in meaning to the word. If you get it right, you get a harder word. If wrong, you get an easier word. For each word you get right, we donate 20 grains of rice to UNWFP.
How does the vocabulary game help you?
This game may make you smarter. While learning new vocabulary, it can help you:
★Present your ideas better
★Write better papers, e-mails and business letters
★Speak more accurately and influentially
★Read faster because you understand better
★Get better grades in high school and college
★Perform better at job interviews
★Be more effective and successful at your job
After you have done FreeRice for a couple of days, you may notice a phenomenon. Words that you have never consciously used before will begin to pop into your head while you are speaking or writing. You will feel yourself using and knowing more words.
How does the FreeRice vocabulary program work?
FreeRice has a database containing thousands of words at different levels of difficulty. There are words proper for people just learning English and words that will challenge the most learned professors. In between are thousands of words for students, business people, doctors, truck drivers… everyone!
FreeRice adjusts to your level of vocabulary. It starts by giving you words at different levels of difficulty and then, based on how you do, designs a proper starting level for you. When you get a word wrong, you go to an easier level. When you get three words in a row right, you go to a harder level. There are 60 levels in all, but it is rare for people to get above Level 50.
Sign up now and you will have fun as well as help end world hunger.
1.
According to the passage, the purpose of the vocabulary game is to ______.
A.
combine English learning with helping hungry people
B.
make it popular in English-speaking countries
C.
encourage people to produce more rice
D.
provide English learning for poor areas
2.
Playing the vocabulary game enables you to ______.
A.
develop some new ideas
B.
increase chances of job interview
C.
be admitted to a university
D.
perform better in a speech competition
3.
People of different vocabulary levels can play the game because ______.
A.
it is free of charge
B.
it offers fair chances to everyone
C.
it changes levels with their performance
D.
it meets the needs of people in different fields
Psychologists tell us that there are four basic stages that human beings pass through when they enter and live in a new culture.This process begins with the “honeymoon stage”.This is the period of time when we first arrive in which everything about the new culture is strange and exciting.We may be suffering from “jet lag” but we are thrilled to be in the new environment, seeing new sights, hearing new sounds and language, eating new kinds of food.This stage can last for quite a long time because we feel we are involved in some kind of great adventure.
Unfortunately, the second stage can be more difficult.After we have settled down into our new life, we can become very tired and begin to miss our homeland and our family, friends, pets.All the little problems in life seem to be much bigger and more disturbing when you face them in a foreign culture.This period of cultural adjustment can be very difficult and lead to rejecting or pulling away from the new culture.
The third stage is called the “adjustment stage”.This is when you begin to realize that things are not so bad in the host culture.Your sense of humour usually becomes stronger and you realize that you are becoming stronger by learning to take care of yourself in the new place.Things are still difficult, but you are now a survivor!
The fourth stage can be called “at ease at last”.Now you feel quite comfortable in your new surroundings.You can cope(deal) with most problems that occur.You may still have problems with the language, but you know you are strong enough to deal with them.
1.
This passage mainly talks about ________.
A.
culture and foreign language learning
B.
adventures in a foreign land
C.
getting used to a new culture
D.
the interaction of different cultures
2.
Which of the following best describes the first stage?
A.
Lonely and depressed
B.
Bored and homesick
C.
Happy and excited
D.
Angry and frustrated
3.
According to the passage, people are most likely to return to their own culture at the ________stage.
A.
1st
B.
2nd
C.
third
D.
fourth
4.
It can be concluded from the passage that ________.
A.
people feel better in their own culture
B.
it is not easy to adapt to a new culture
C.
culture shock doesn’t occur at the beginning
D.
it is human nature to long for adventures
He’s an old cobbler(修鞋匠) with a shop in the Marais, a historic area in Paris. When I took him my shoes, he at first told me, “I haven’t time. Take them to the other fellow on the main street. He’ll fix them for you right away.”
But I had my eyes on his shop for a long time. Just looking at his bench loaded with tools and pieces of leather, I knew he was a skilled craftsman(手艺人). “No.” I replied, “The other fellow can’t do it well.”
“The other fellow” was one of those shopkeepers who fix shoes and make keys — without knowing much about mending shoes or making keys. They work carelessly, and when they have finished sewing back a sandal strap(鞋带), you might as well just throw away the pair.
My man saw I wouldn't give in, and he smiled. He wiped hands on his blue apron(围裙), looked at my shoes, had me write my name on one shoe with a piece of chalk and said, “Come back in a week.”
I was about to leave when he took a pair of soft leather boots off a shelf.
“See what I can do?” he said with pride. “Only three of us in Paris can do this kind of work.”
When I got back out into the street, the world seemed brand-new to me. He was something out of an ancient legend, this old craftsman with his way of speaking familiarly, his very strange dusty felt hat, his funny accent and his pride in his craft.
These are times when nothing is important but the bottom line, when you can do things any old way as long as it “pays”, when, in short, people look on work as a path to ever-increasing consumption rather than a way to realize their abilities. In such a period it is a rare comfort to find a cobbler who gets his greatest satisfaction from pride in a job well done
1.
Which of the following is true about the old cobbler?
A.
He was equipped with the best repairing tools
B.
He was the only cobbler in the Marais
C.
He was proud of his skills
D.
He was a native Parisian
2.
The sentence “He was something out of an ancient legend” implies that ______.
A.
nowadays you can hardly find anyone like him
B.
it was difficult to communicate with this man
C.
the man was very strange
D.
the man was too old
3.
According to the author, many people work just to ______.
A.
realize their abilities
B.
gain happiness
C.
make money
D.
gain respect
4.
This story wants to tell us that ______.
A.
craftsmen make a lot of money
B.
whatever you do, do it well
C.
craftsmen need self-respect
D.
people are born equal
From poor beginnings to most expensive player
ZINEDINE Zidane,who dreams of leading France to its second World Cup title in a row next month,has always preferred to express himself with a football rather than with words.
Last Wednesday Zidane scored the decisive goal when Real Madrid of Spain won the Champions League final against Germany's Leverkusen 2一1.
He became one of the world’s most expensive players when he joined Real Madrid from Italy's Juventus for US $ 66 million.And he has been a national hero since he scored twice in the 3-O defeat of Brazil in the 1998 World Cup Final.
But despite his success,Zidane has always kept his feet on the ground.He leads a quite family life,there is hardly any gossip about him and he avoids putting his wife and two children in the spotlight.
“Just because I'm a public figure it doesn't mean I have to express myself on everything.I don't like to discuss some personal matters publicly.”he said.
Even as a child playing football in the slum area of Marseille,France,where he was raised by his Algerian parents,Zidane was shy.
He loved football even as a little kid.“I realized football is a wonderful mixture of a sharp mind and hard training rather than just talking,”he said.
Even when the match awards were just chocolate and bread,Zidane found that football made his poor childhood rich.
Before he was 10 years old,it was obvious that he could become a great footballer.He was offered his first professional contract(合同)when he was just 20.Now,at the age of 29,he has already picked up two World Player of the year awards.
This quiet striker has not yet spoken of his hopes for the coming World Cup.But his fans across the world will be eagerly watching him to see what he'll do this time.
1.
What did Zidane learn from his childhood football experience? He learned that_____________.
A.
he could become a great footballer
B.
he could become rich if he became a footballer
C.
football is a mixture of a sharp mind and hard training but not just talking
D.
football is a favorite sport in the future
2.
According to the article,what are Zidane’s main characteristics?
A.
He is a shy but successful man.
B.
H e loves his wife and children.
C.
He doesn't like to speak in public.
D.
He is a quiet,down—to earth person of few words.
3.
When the writer says“Zidane has always kept his feet on the ground”,he means_________.
A.
Zidane spends more time standing than sitting most days
B.
Zidane is a down-to earth person
C.
Zidane has spent most of his time training on the pitch
D.
Zidane likes standing when he succeeds
4.
The sentence“Zidane found that football made his poor childhood rich”means___________.
A.
football made Zidane's poor family wealthy when he was a child
B.
Zidane knew that football could bring him fame and wealth even when he was a child
C.
football brought happiness to Zidane when he was a child in a poor family
D.
Zidane knew that if he wanted to be rich he must play football from childhood
A desert is a beautiful land of silence and space. The sun shines, the wind blows, and time and space seem endless. Nothing is soft. The sand and rocks are hard, and many of the plants even have hard needles instead of leaves.
The size and location(分布) of the world’s deserts are always changing. Over millions of years, as climates change and mountains rise, new dry and wet areas develop. But within the last 100 yeas, deserts have been growing at a frightening speed. This is partly because of natural changes, but the greatest makers are humans.
Humans can make deserts, but humans can also prevent their growth. Algeria Mauritania is planting a similar wall around Nouakchott, the capital. Iran puts a thin covering of petroleum(石油) on sandy areas and plants trees. The oil keeps the water and small trees in the land, and men on motorcycles(摩托车) keep the sheep and goats away. The USSR and India are building long canals to bring water to desert areas.
1.
In this passage, “needles” refers to _______.
A.
small, thin pieces of steel.
B.
long, thin pieces of branches.
C.
small pointed growth on the stem(茎) of a plant.
D.
small, thin pieces of sticks.
2.
Which of the following is NOT true?
A.
The greatest desert makers are humans.
B.
There aren’t any living things in the deserts.
C.
Deserts have been growing quickly.
D.
The size of the deserts is always changing.
3.
People in some countries are fighting a battle against _______.
A.
the growth of deserts
B.
the disappearance of desert plants
C.
natural changes
D.
congenital climate
4.
We can guess that Mauritania and Algeria belong to _______.
A.
Asian countries
B.
American countries
C.
European counties
D.
African countries
5.
Choose the sentence which best gives the main idea of the passage.
A.
The deserts of the world are always changing.
B.
Man is to take measures to control the growth of the world’s deserts.
C.
Deserts are lands of silence and space.
D.
Deserts have grown at a fast pace in the past 10 years.
People like different kinds of vacations. Some go camping. They swim, fish, cook over a fire and sleep outside. Others like to stay at a hotel in an exciting city. They go shopping all day and go dancing all night. Or maybe they go sightseeing to places such as Disneyland, the Tai Mahan or the Louver.
Some people are bored with sightseeing trips. They don’t want to be “tourists”. They want to have an adventure--a surprising and exciting trip. They want to learn something and maybe help people too. How can they do this? Some travel companies and environmental groups are planning special adventures. Sometimes these trips are difficult and full of hardships, but they’re a lot of fun. One organization, Earth watch, sends small groups of volunteers to different parts of the world. Some volunteers spend two weeks and study the environment. Others work with animals. Others learn about people of the past.
Would you like an adventure in the Far North? A team of volunteers is leaving from Mormons, Russia. The leader of this trip is a professor from Alaska. He’s worried about chemicals from factories. He and the volunteers will study this pollution in the environment. If you like exercise and cold weather, this is a good trip for you. Volunteers need ski sixteen kilometers every day.
Do you enjoy ocean animals? You can spend two to four weeks in Hawaii. There, you can teach language to dolphins. Dolphins can follow orders such as “Bring me the large ball.” They also understand opposites. How much more can they understand? It will be exciting to learn about these intelligent animals. Another study trip goes to Washington State and follows orcas. We call orcas “killer Whale”, but they’re really dolphins—the largest kind of dolphin. This beautiful animal travels together in family groups. They move through the ocean with their mothers, grandmothers and great-grandmothers. Ocean pollution is chasing their lives. Earth watch is studying how this happens.
Are you interested in history? Then Greece is the place for your adventure. Thirty-five hundred years ago a volcano exploded there, on Santorum. This explosion was more terrible than Karate or Mount Saint Helens. But today we know a lot about the way of life of the people from that time. There are houses, kitchens, and paintings as interesting as those in Pompeii. Today teams of volunteers are learning more about people from the past.
Do you want a very different vacation? Do you want to travel far, work hard and learn a lot? Then an Earth watch vacation is for you.
1.
The Tai Mahan may be _______.
A.
a shopping center
B.
a hotel
C.
a dancing hall
D.
a place of interest
2.
From the passage, on an adventure trip, people ______.
A.
may not spend much time on sightseeing
B.
won’t meet some difficulties or hardships
C.
can’t enjoy them
D.
can’t learn something
3.
If you want to learn something about people of the past, you can _______.
A.
join the team to Hawaii
B.
join the team to the Far North
C.
join the team to Washington
D.
join the team to Greece
4.
The word intelligent in paragraph 4 means _______.
A.
exciting
B.
beautiful
C.
large
D.
clever
5.
Which of the following is false?
A.
Some people find sightseeing trips boring.
B.
Earth watch is planning all these special adventures.
C.
The number of orcas is decreasing.
D.
3 volcano explosions in all broke out 3, 500 years ago in Greece.
Open Letter to an Editor
I had an interesting conversation with a reporter recently --- one who works for you. In fact, he’s one of your best reporters. He wants to leave.
Your reporter gave me a copy of his resume(简历) and photocopies of six stories that he wrote for you. The headlines showed you played them proudly. With great enthusiasm, he talked about how he finds issues(问题), approaches them, and writes about them, which tells me he is one of your best. I’m sure you would hate to lose him. Surprisingly, your reporter is not unhappy. In fact, he told me he really likes his job. He has a great assignment (分工), and said you run a great paper. It would be easy for you to keep him, he said. He knows that the paper values him. He appreciates the responsibility you’ve given him, takes ownership of his profession, and enjoys his freedom.
So why is he looking for a way out?
He talked to me because he wants his editors to demand so much more of him. He wants to be pushed, challenged, coached to new heights.
The reporter believes that good stories spring from good questions, but his editors usually ask how long the story will be, when it will be in, where it can play, and what the budget is.
He longs for conversations with an editor who will help him turn his good ideas into great ones. He wants someone to get excited about what he’s doing and to help him turn his story idea upside down and inside out, exploring the best ways to report it. He wants to be more valuable for your paper. That’s what you want for him, too, isn’t it?
So your reporter has set me thinking.
Our best hope in keeping our best reporters, copy editors, photographers, artists --- everyone --- is to work harder to make sure they get the help they are demanding to reach their potential. If we can’t do it, they’ll find someone who can
1.
What does the writer think of the reporter?
A.
Optimistic
B.
Imaginative
C.
Ambitious
D.
Proud
2.
What does the reporter want most from his editors in their talks?
A.
Finding the news value of his stories
B.
Giving him financial support
C.
Helping him to find issues
D.
Improving his good ideas
3.
Who probably wrote the letter?
A.
An editor
B.
An artist
C.
A reporter
D.
A reader
4.
The letter aims to remind editors that they should ______
A.
keep their best reporters at all costs
B.
give more freedom to their reporters
C.
be aware of their reporters’ professional development
D.
appreciate their reporters’ working styles and attitudes
Research by sociologists Scott Coltrance Michele Adams looked at national survey data and found that when men increase their share of housework and childcare, their children are happier, healthier and do better at school.What’s more, when school-aged children do housework with their fathers, they get along better with their peers and have more friends.And they show more positive behaviors than if they do the same work with their mothers.“Because fewer men do housework than women,” said Adams, “when they share the work,it has more influence on children.” Fathers model “co-operative family partnerships”.
When men share housework and childcare, it turns out, their partners are happier.Wives of egalitarian(主张人人平等的)husbands, regardless of class, report the highest levels of marital(婚姻的)satisfaction and lowest rates of depression,and are less likely to see therapists(治疗专家).They are also more likely to stay fit, since they probably have more time on their hands.
And the benefits for men are even greater.Men who share housework and childcare are healthier--physically and psychologically.They smoke less, drink less, and take recreational drugs less often.They are more likely to stay in shape and more likely to go to doctors for routine screenings, but less likely to use emergency rooms or miss work due to illness.
In both Europe and the United States,Dad is becoming the “fun parent”.He takes the kids to the park and plays soccer with the kids; she stays home.“What a great time we had with Dad!” the kids announce as they burst through the kitchen door to a lunch mum prepared.
1.
We can infer from the first paragraph that
.
A.
fathers usually have greater influence on their children
B.
it's better for school-aged children to do housework with their mothers
C.
few boys would like to do housework
D.
children benefit more from doing housework with their fathers
2.
Which of the following is NOT true of a woman whose husband shares housework?
A.
She enjoys a high level of satisfaction at home.
B.
She is less likely to develop depression.
C.
She will have more free time.
D.
She is more likely to gain weight.
3.
Men who share housework and childcare
.
A.
benefit physically more than psychologically
B.
will take the place of women
C.
are less likely to develop bad habits
D.
don’t perform well at work
4.
The passage is mainly about
.
A.
the new pattern of family relations in Europe and the US
B.
the benefits of men’s participation in housework and childcare
C.
the problems of men’s participation in childcare
D.
the important role husbands play in the family
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