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题型:阅读理解-阅读单选 难度:0.65 引用次数:424 题号:12811761

Ever wondered if dogs can learn new words? Yes, say researchers as they have found that talented dogs may have the ability to grasp new words after hearing them only four times.

While previous evidence seems to show that most dogs do not learn words, unless eventually very well trained, a few individuals have shown some extraordinary abilities, according to a study published in the journal Scientific Reports.

“We wanted to know under which conditions the gifted dogs may learn novel words,” said researcher xuekw Claudia Fugazza from the Eötvös Loránd University in Hungary. For the study, the team involved two gifted dogs, Whisky and Vicky Nina. The team exposed the dogs to the new words in two different conditions.

In the exclusion-based task, presented with seven known toys and one new toy, the dogs were able to select the new toy when presented with a new name. Researchers say this proves that dogs can choose by exclusion when faced with a new word, they selected the only toy which did not have a known name.

However, this was not the way they would learn the name of the toy. In fact, when they were presented with one more equally new name to test their ability to recognize the toy by its name, the dogs got totally confused and failed.

The other condition, the social one, where the dogs played with their owners who pronounced the name of the toy while playing with the dog, proved to be the successful way to learn the name of the toy, even after hearing it only 4 times. “The rapid learning that we observed seems to equal children’s ability to learn many new words at a fast rate around the age of 18 months,” Fugazza says. “But we do not know whether the learning mechanisms(机制) behind this learning are the same for humans and dogs. ”

To test whether most dogs would learn words this way, 20 other dogs were tested in the same condition, but none of them showed any evidence of learning the toy names, confirming that the ability to learn words rapidly in the absence of formal training is very rare and is only present in a few gifted dogs.

1. What was the purpose of the study published in Scientific Reports?
A.To better train dogs’ ability to learn new words.
B.To further confirm previous evidence about dogs.
C.To prove extraordinary memory abilities of gifted dogs.
D.To explore favorable conditions for gifted dogs’ new-word learning.
2. How did the dogs react when exposed to two new names in the first condition?
A.Slow to understand.B.Quick to learn.C.At a loss.D.In a panic.
3. What was found about dogs’ new-word learning in the social condition?
A.Learning through playing applied to most dogs.
B.The social condition helped dogs learn new words.
C.Dogs’ new-word learning turned out to be less effective.
D.Dogs shared similar learning mechanisms with children.
4. Which of the following is the best title for the text?
A.Gifted Dogs Can Learn New Words Rapidly.
B.Dogs Identify Newly-named Toys by Exclusion.
C.Dogs Can Acquire Vocabulary through Tons of Training.
D.Gifted Dogs Have Similar Learning Abilities to Humans.

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【推荐1】Far from the land of Antarctica(南极洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.

For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secrets. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.

Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish's blood and measured its freezing point.

The fish were taken from seawater that had a temperature of—1.88°C and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to-2.05°C. That small difference is enough for the fish to live at the freezing temperature of the ice—salt mixture.

The scientists' next research job was clear: Find out what in the fish's blood kept it from freezing. Their research led to some really strange thing made up of a protein(蛋白质)that has never been seen before in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.

Study showed that it is an unusual kind of protein. It has many small sugar molecules(分子)held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein, or AFGP.

1. Why can the Antarctic cod live at the freezing temperature?
A.The seawater has a temperature of-1.88°C.B.It loves to live in the ice—salt mixture.
C.A special protein keeps it from freezing.D.Its blood has a temperature lower than-2.05°C
2. Which of the statements is true according to the passage?
A.No one can carry out any research work in the Antarctic
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C.The protein in the blood of the Antarctic cod has a low freezing point
D.The sugar content is believed to be an unusual kind of protein.
3. What is special about the protein in the blood of the cod?
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C.The ice shelf around Antarctica.D.Protection of the Antarctic cod
2021-12-11更新 | 85次组卷
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Humans have caused some insect species to be moved from one part of the world to another—deliberately or by accident. If the introduced insect species has no natural enemies in their new home, they can become a real problem. A recent UK example is the Harlequin ladybird, which has found its way to Britain and eats other ladybirds.

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So, when it comes to insects, its important to understand the consequences of human actions.

Insects as an opportunity

Insects are very important as pollinators(传粉者). Bees are perhaps the best example of this.     3    Pollination is needed before many crops and fruits that we eat can be formed.

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【推荐3】The elephant was lying heavily on its side, fast asleep. A few dogs started barking at it. The elephant woke up in a terrible anger: it ran after the dogs into the village where they ran for safety.

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2020-07-18更新 | 28次组卷
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