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题型:阅读理解-阅读单选 难度:0.65 引用次数:98 题号:12907635

Dogs and horses may not be the closest teammates, but the two animals can have their fair share of fun — at times even playing together and mimicking(模仿)each other's facial expressions, new research suggests. These findings, published in the journal Behavioural Processes, mark the first example of so-called rapid facial mimicry occurring between play partners of different species, and suggest the existence of a universal language of play.

Though the purpose behind play remains unclear, scientists suspect the behavior is to help animals develop hunting and social skills, relieve stress or promote relationships with each other. Learning more about the contexts in which different animals play together could tell researchers a lot about play's origins and development. But apart from a handful of studies featuring humans and their pets, scientists haven't had many chances to analyze examples of interspecies' plays.

In 2018, when someone sent Palagi, an animal behaviorist, a video where a dog and horse play together, interacting with each other fluently, she took the chance to investigate further. The two species were good choices for study, because they both could recognize facial expressions in other animals. Gathering a team, Palagi began to collect and analyze hundreds of other videos where canines(犬类)and equids (马科动物) played together.

At last, 20 videos were picked out: showing animals freely playing on their own, for at least 30 seconds, without human involvement. In the videos, dogs and horses often mimicked each other's moves, jumping, pushing and even biting slightly and naughtily at each other. They also put themselves in weak and easily attacked positions, such as rolling on their backs, displaying their throats and stomachs — a strong sign that they were at ease and even showing their friendliness.

The two creatures also frequently mimicked each other's facial expressions, both adopting the relaxed, open mouths — a behavior that's been noted in wild, social primates(灵长类动物),but never between a pair of animals of different species.

1. What does the new research find about dogs and horses?
A.No animals have a closer relationship than them.
B.They can share fun with each other.
C.They have facial mimicry and a possible universal language of play.
D.Any other species can be their play partner.
2. What can we infer about interspecies' plays?
A.Scientists can never know the reasons for the plays.
B.The plays help animals to survive and socialize.
C.Knowing their evolution helps learn about animals' contexts.
D.The play between humans and pets isn't included.
3. What can we know from Palagi's investigation on canines and equids?
A.They are perfectly suitable for the study.
B.They play longer with humans joining m.
C.They show closeness with specific positions.
D.They mimic as the wild, social primates do.
4. According to the passage, what could be discussed in the following paragraphs?
A.More examples of facial mimicry.
B.Study on mimicry of the wild, social primates.
C.Facial expressions of different species.
D.A possible universal language of play.

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【推荐1】A man who broke his neck outdoors in freezing conditions survived lying in snow for nearly 20 hours thanks to his dog,who kept him warm through the night and barked for help.

The Michigan man, named only as Bob, was alone when he left his farmhouse on New Year's Eve to collect firewood. Predicting a journey of only several metres, Bob was wearing just long jeans,a shirt and slippers when he went outside, despite the temperature being around —4°C. However, he slipped and broke his neck.

“I was screaming for help but my nearest neighbour is about a quarter mile away and it was 10 :30 pm, but my Kelsey came" said Bob. Kelsey is Bob's five-year-old Golden Retriever. She kept Bob warm by lying on top of him,and kept him awake by licking(舔)his hands and face. Bob said:"She kept barking for help but never left my side. She kept me warm and awake. I knew I had to persevere through this and that it was my choice to stay alive. " “By morning my voice was gone and I couldn't yell for help, but Kelsey didn't stop barking. She was letting out this screeching howl that alerted my neighbour. He found me at 6 :30 p. m. on New Year's Day. ”

Bob's neighbour eventually discovered him after hearing Kelsey's howls and called the emergency services. When Bob arrived in hospital, his core temperature was below 21°C. “I was surprised to find out that I didn't have any frost bite "said Bob, " I am sure it was because of Kelsey's determination to keep me warm and safe. "And to the surprise of doctors, Bob made a quick recovery from his neck injury.

“I am so thankful for my two heroes," Bob said. “Kelsey kept me warm, alert, and never stopped barking for help. Dr Colen saved my life and ability to move. They are truly heroes and I will be eternally grateful. ”

1. Why did Bob wear very little when he went outside?
A.He was alone and poor.B.He had no enough clothes.
C.The firewood was near his farmhouse.D.The temperature outside is moderate.
2. How did Kelsey keep Bob warm?
A.By licking his hands and face.B.By making use of her own body.
C.By lifting Bob on top of her.D.By keeping barking all the time.
3. Which of the following has the closest meaning to “alerted" underlined in Paragraph 3?
A.Warned.B.Visited.C.Confused.D.Scared.
4. Which words can best describe Kelsey?
A.Cute and brave.B.Smart and honest.
C.Helpful and confident.D.Loyal and clever.
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【推荐2】Recordings (录音) of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives ( 蜂窝) either recorded or real may even prevent elephants from damaging farmer’s crops.

Years ago, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today, Lucy wants to see if African honeybees might stop elephants from eating crops.

But before she asked farmers to set up beehives on their farms, she needed to find out if the bees would frighten elephants away.

Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next, Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a tree close to each family.

From a distance, Lucy turned on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group didn’t react to the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy played the sound of a waterfall ( 瀑布) instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place.

Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn’t tested enough groups yet to know and she has now begun placing speakers in the fields to see if elephants are frightened away.

1. What can be the title of the passage?
A.Bees are the King of the ForestB.How to Keep Elephants Away
C.Don’t Get Close to Angry BeesD.Angry Bees Frighten Big Elephants Away
2. Why did Lucy throw a stone into a wild beehive?
A.To record the sound of angry bees.
B.To make a video of elephants.
C.To see if elephants would run away.
D.To find out more about the behavior of bees.
3. Which of the following is TRUE according to the passage?
A.Groups of elephants will make bees angry..
B.Waterfalls can make elephants stay in one place.
C.Elephants do not go near trees with bees living in them.
D.Young elephants ignore African honeybees.
4. According to the passage, Lucy ________.
A.works by herself in Africa
B.needs to test more elephant groups
C.has stopped elephants eating crops
D.has got farmers to set up beehives on their farms
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【推荐3】Chimpanzees (黑猩猩) do have stronger muscles than us, but they are not nearly as powerful as many people think.

“There’s an idea out there that chimpanzees are superhumanly strong”, says Matthew O’Neill at the University of Arizona in Phoenix. Yet his team’s experiments and computer models show that a chimpanzee muscle is only about a third stronger than a human one of the same size.

This result matches well with the few tests that have been done, which suggest that when it comes to pulling and jumping, chimps are about 1.5 times as strong as humans relative to their body mass. “But because they are lighter than the average person, humans can actually outperform them in absolute terms,” says O’Neill.

His findings suggest that other apes (类人猿) have similar muscle strength to chimpanzees. “Humans are the odd ones,” he says.

O’Neill’s team has been studying the evolution of upright walking. To create an accurate computer model of how chimps walk,the researchers needed to find out whether their muscles really are much stronger. So they removed small samples of leg muscle from three chimps and measured the strength of individual fibers (纤维).

The same procedure is used to study human muscles. Comparing the results with the many studies on those showed that, contrary to the claims of several other studies, there is nothing special about chimp muscle.“Chimpanzee muscle is really no different than human muscle in terms of the force that individual fibers use.” says O’Neill.

So why, on a pound-for-pound basis, are chimps slightly stronger than humans? The team went on to look at the muscle of chimps that had died of natural causes, which showed that two-thirds of their muscle is made of fast-twitch fibers, whereas more than half of human fibers are slow-twitch. Fast-twitch fibers are more powerful, but use more energy and become tired faster.

Another factor, O’Neill found, is that chimps have longer fibers on average which also improves their strength.

This adds to the evidence that walking uses far more energy for chimps than for people. The results fit well with the idea that early humans evolved to walk or run long distances. It seems that we gave up some strength for greater endurance (耐力).

1. What does O’Neill mean when he says “Humans are the odd ones”?
A.Humans are better at jumping and pulling things than chimps.
B.Humans’ muscle strength is different from that of apes.
C.Humans are heavier and stronger than chimpanzees.
D.There is nothing special about human muscles.
2. What contributes a lot to the strength of chimp muscles?
A.The evolution of upright walking.
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C.Most of their muscles being made of short fibers.
D.The fast-twitch fibers in their muscles.
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A.short fibers provide more energy for the muscle
B.early humans needed much more energy than chimps
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D.slow-twitch muscle fibers help chimps survive in the wild
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A.Chimpanzees have much stronger muscles than us.
B.Chimpanzees can jump higher than us.
C.Chimp muscle is almost the same as humans.
D.Humans can walk longer than Chimpanzees.
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