Dogs wag(摇摆) their tails in different directions depending on whether they are excited and wanting to move forward or threatened and thinking of moving back,a study has found.
Researchers in Italy examined the tail wagging behaviour of 30 dogs,catching their responses to a range of stimuli(刺激物) with video cameras.To conduct the study they chose 15 male dogs and 15 female ones aged between one and six years.The dogs were all family pets whose owners had allowed them to take part in the experiment at Ban University.The dogs were placed in a large wooden box with an opening at the front to allow for them to view various stimuli.They were tested one at a time.
The researchers led by Professor Giorgio Vallortigara of the University of Trieste found that when the dogs were shown their owners-a positive experience-their tails wagged energetically to the right side.When they were shown an unfamiliar human they wagged to the right,but with somewhat less enthusiasm.The appearance of a cat again caused a right-hand side wag,although with less intensity again.The appearance of a large unfamiliar dog,similar to a German shepherd,changed the direction of tail wagging to the left.Reseachers supposed the dog was thinking of moving back.When the dogs were not shown any stimuli they tended to wag their tails to the left,suggesting they preferred company.While the changes in the tail wagging were not easily noticed without the aid of video,it was thought that the findings could help people judge the mood(心情) of dogs.Computer and video systems,for example,could be used by professional dog trainers to determine the mood of dogs that they were required to approach.
1. |
The video cameras were used to catch the dogs' responses because.
|
2. |
The underlined word "intensity" in the passage means.
|
3. |
When there are no stimuli,a dog will.
|
4. |
The underlined word "they" refers to.
|
5. |
The purpose of doing the experiment is.
|
Officials in a remote Russian city have drawn up a list of practical tips for locals on how to survive encounters (相遇) with bears, after growing numbers have wandered into the streets in search of food.
Officials in the city of Syktyvkar drew up the guidelines to guide the local people, after several bears were caught sight of in the city, going hungry after a heat wave shriveled their usual diet of nuts and berries.
The guide warns that city people there should stay calm and stand still if they meet with a bear. “Speak to the bear in a firm voice” and “Don’t turn your back on it,” it adds. In the worst case, if the bear attacks, the person should also be ready to attack, the guide says. “Shout angrily at it and look it straight in the eye,” the guide advises. “Bears have started coming into the areas where people live more and more often,” the city officials said in a statement. “Any encounter with a bear is unsafe for humans, so our task is to do all we can to prevent such accidents.”
In September, a bear attacked a 25-year-old man in a central street of the city, wounding him in the neck before he managed to run away, police said. “Three or four people who met with brown bears have been recorded recently,” the head of the hunting department in the regional agriculture organization, Alexander said.
Officials have asked police to patrol (巡逻) streets close to wooded areas in the evenings.
Syktyvkar is the regional capital of the remote Komi region in northwest Russia. Its population is just over 230,000.
.
The city issued the guidelines to help the local people to _____.
A.avoid bear encounters | B.survive bear encounters |
C.get along well with bears | D.drive hungry bears away |
.
The underlined word “shriveled” in Paragraph 2 probably means _____.
A.piled up | B.saved up | C.kept up | D.dried up |
.
What can be inferred from Alexander’s words?
A.Bears have been seen frequently recently. |
B.Bears like to wander around schools. |
C.Brown bears are usually very fierce. |
D.Too many bears have disappeared. |
.
What would be the best title for the passage?
A.Bears are short of food worldwide |
B.Ways to got along well with bears |
C.Tips are issued on bear encounters |
D.Bears have started coming into cities |
1. The Video Camera Pen
Item 78431; $129.95
Available for Immediate Shipment
Order by Phone: 1-800-321-1484
This is the pen that has a built-in video camera, capturing videos or still images
with a click of its button. Ideal for use while secured in a pocket, it can capture
up to five hours of video and up to 20,000 images. Its battery provides up to two
hours of power before requiring a recharge.
2. The Wristwatch Camcorder
Item 78098; $149.95
Available for 3-day shipment
Order by Phone: 1-800-321-1484
This is the men’s watch with an unnoticeable camcorder, so you’ll always have a camera ready to capture a chance famous person or a pet’s
Ridiculous actions. The camera is located at the two-o’clock position,
yet the watch’s hands never make it covered.to two hours of use from a four-hour charge.
3. The only 55 Inch Widescreen Personal Movie Theater
Item 77918; $249.95
Available for Immediate Shipment
Order by Phone: 1-800-321-1484
This is the only personal media viewer that provides a
private viewing experience just like watching a widescreen 55 inch television from 10 meters away. It connects to a video iPod, iPhone, portable DVD player. Includes two AA batteries that provide up to six hours of continuous operation and iPod cable.
4. The Digital Phone Album Watch
Item 77281; $99.95
Available for Immediate Shipment
Order by Phone: 1-800-321-1484
This is the watch that vividly displays 120 of your favorite digital
photographs. You can download digital photographs to the watch. The watch can
be viewed in the Photo Album mode(time and photo view) or digital mode (time
and date view). A six-hour charge provides up to 10 days of use.What’s the purpose of this passage?
A.To compare some creative inventions. |
B.To advertise some unique goods. |
C.To teach how to operate the items. |
D.To show how fashionable the items are. |
What do Item 78431 and Item 78098 have in common according to this passage?
A.They both sell well. | B.They are both cheap. |
C.They both have unusual appearances. | D.They both can take photos. |
Which of the following is TRUE according to the passage?
A.In fact, Item 78098 cannot tell time. |
B.Item 77918 works as a DVD player. |
C.In a way, Item 77281 is user-friendly. |
D.All the items include rechargeable batteries. |
Social networking websites are causing alarming changes in the brains of young users, a famous scientist has warned.Sites such as Facebook, Twitter and Bebo are said to shorten attention spans (幅度), encourage instant satisfaction and make children more self-centered.
Warnings from neuroscientist (神经系统科学家) Susan Greenfield will disturb the millions whose social lives depend on surfing their favorite websites each day.But they will strike a chord (弦) with parents and teachers who complain that many teenagers lack the ability to communicate or concentrate away from their screens.
More than 150 million use Facebook to keep in touch with friends, share photographs and videos and post regular updates of their movements and thoughts.A further six million have signed up to Twitter, the "micro-blogging" service that lets users exchange text messages about themselves.But while the sites are popular and extremely profitable, a growing number of psychologists and neuroscientists believe they may be doing more harm than good.
Baroness Tarot, an Oxford University neuroscientist believes repeated exposure could rewire the brain.Computer games and fast-paced TV shows were also a factor, she said."My fear is that these technologies are weakening the brain to the state of small children who are attracted by buzzing noises and bright lights, who have a small attention span and live for the moment." "I often wonder whether real conversation in real time may eventually give way to these easier and faster screen dialogues, in much the same way as killing and butchering an animal to eat has been replaced by the convenience of packages on the supermarket shelf," she said.
Psychologists have also argued that digital technology is changing the way we think.They point out that students no longer need to plan their term papers before starting to write—thanks to word processors they can edit as they go along.
A study by the Broadcaster Audience Board found teenagers now spend seven and a half hours a day in front of a screen.Educational psychologist Jane Healy believes children should be kept away from computer games until they are seven.Most games only excite the "flight or fight" areas of the brain, rather than the areas responsible reasoning.
Sue Palmer, author of Toxic Childhood, said: "We are seeing children's brain development damaged because they don't engage in the activity they have engaged in for thousands of years.I'm not against technology and computers.But before they start social networking, they need to learn to make real relationships with people."
.
According to the passage, social networking websites might _____.
A.make young users more selfish |
B.lengthen young users' attention span |
C.encourage young users constant satisfaction |
D.help young users communicate better with their families |
.
A neuroscientist may worry that sites like Facebook may ______.
A.help children learn to make real relationships with people in society |
B.encourage students not to plan their term papers before starting to write |
C.disturb those whose social lives depend on surfing their favorite websites |
D.make real conversation in real time give way to easier and faster screen dialogue |
.
From the passage we can infer that _____.
A.Baroness Tarot agrees websites cause small children's small attention span |
B.Jane Healy believes computer games can do good to children's reasoning |
C.Susan Greenfield's warnings have been brought to wide public attention |
D.Sue Palmer's book Toxic Childhood discusses the development of networking |
.
What is the purpose of this passage?
A.To tell us the conflict between neuroscientists and psychologists on websites. |
B.To present some negative opinions on social networking websites. |
C.To offer advice on the problem of brain damage caused by social networking. |
D.To analyse how social networking websites cause damage in the brains of teenagers. |
Grandpa Nybakken loved life—especially when he could play a trick on somebody. At those times, his large Norwegian frame shook with laughter while he pretended innocent surprise, exclaiming, “Oh, forevermore!” But on a cold Saturday in downtown Chicago, Grandpa felt that God played a trick on him, and grandpa wasn’t laughing.
Grandpa worked as a carpenter. On this particular day, he was building some boxes for the clothes his church was sending to an orphanage abroad. On his way home, he reached into his shirt pocket to find his glasses, but they were gone. He remembered putting them there that morning, so he drove back to the church.His search proved fruitless.
Suddenly, he realized what had happened. The glasses had slipped out of his pocket unnoticed and fallen into one of the boxes, which he had nailed shut. His brand new glasses were heading for China!
The Great Depression was at its height, and Grandpa had six children. He had spent twenty dollars for those glasses that very morning.
“It’s not fair,” he told God as he drove home in frustration. “I’ve been very faithful in giving of my time and money to your work, and now this.”
Several months later, the director of the orphanage was on vacation in the United States.He wanted to visit all the churches that supported him, so he came to speak on Sunday night at my grandfather’s small church in Chicago.Grandpa and his family sat in their usual seats among the small congregation(教堂会众).
“But most of all,” he said, “I must thank you for the glasses you sent last year.”
“Even if I had the money, there was simply no way of replacing those glasses.Along with not being able to see well, I experienced headaches every day, so my co-workers and I were much in prayer about this.Then your boxes arrived.When my staff removed the covers, they found a pair of glasses lying on the top.” After a long pause, he continued, “Folks, when I tried on the glasses, it was as though they had been custom-made just for me! I want to thank you for being a part of that!”
The people listened, happy for the amazing glasses.But the director surely must have confused their church with another, they thought, there were no glasses on their list of items to be sent overseas.
But sitting quietly in the back, with tears streaming down his face, an ordinary carpenter realized the Master Carpenter had used him in an extraordinary way.
56.Which of the following is NOT true about Grandpa Nybakken according to the passage?
A.He was an outgoing man and held an active attitude towards life. |
B.He had a large family to support. |
C.He was a carpent![]() |
D.He was a loyal Christian. |
Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reason for their interests is that cards from around the world come in a wide variety of different and often very attractive design, There are 100, 000 different cards in Japan alone, and there you can put your own design onto a bank card simply by using a photograph or a business card.
The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are attractive, small and light, and they do not need much space. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can buy only telephone cards, and some French cards cost up to 4,000 pounds. The first Japanese card has a value of about 28,000 pounds. Most people only see cards with prices like these in their collectors’ magazine.The passage is mainly about __________.
A.the history of phone cards. | B.phone card collecting as a hobby |
C.reasons for phone card collecting | D.the great variety of phone cards |
When did people in Britain begin to us
e phone card?
A.In 1971. | B.In 1975 | C. In 1976. | D.In 1981. |
The main reason for most people to collect phone cards is that _________.
A.they find the cards beautiful and easy to keep |
B.they like to have something from different countries |
C.the![]() ![]() |
D.they think the cards are convenient to use |
The writer mentions a market in Paris in order to show that __________.
A.card collecting is popular among young people |
B.French and Japanese cards are the most valuable |
C.People can make money out of card collecting |
D.Card collectors’ magazines are very useful |