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题型:阅读理解-阅读单选 难度:0.4 引用次数:206 题号:10240884

Scientist, conservation organizations and government trying to stop the trend of extinction (灭绝) often focus on protected areas such as national parks and wildlife preserves. But with as many as million species(物种) at risk, this plan of action may not be enough to conserve wildlife.

Slowing the mass extinction that now appears to be underway will require more creative means of coexisting alongside wild plants and animals. A new study indicates the effectiveness of some such approaches by examining some lands managed by indigenous groups.

“ We show really strongly that, from a biodiversity standpoint in terms of species richness,indigenous - managed lands are at least comparable to protected areas, ” says biologist Richard Schuster of Carleton University. And in some places, they are better than parks and preserves -even though indigenous communities may use their lands’ resources by hunting or searching for food.

Schuster and his team analyzed more than 15,000 areas in Australia, Brazil and Canada. They found that the total diversity of wildlife was highest on lands either managed or co - managed by indigenous groups, while randomly selected areas with no formal protection were the least bio-diverse. For threatened species in particular, indigenous lands scored slightly higher than protected lands on overall species richness in Brazil and Canada, as well as higher for threatened animals in Australia.

Each country has a different geography, climate and history. Yet remarkably, Schuster says, the best indicator for species diversity is whether a given area was managed by an indigenous community. He pointed out that practices such as sustainable(可持续的) hunting, fishing and searching, as well as burning, are more likely to occur in such areas. Don Hankins, an ecologist at California State University,agrees. “ there’ s probably going to be more of a connection to the land, ” he says, “ and a use of the land for the things that are there, compared to a national park. ”

“ It’ s really important to listen to the people who live on the land and have them drive the stewardship efforts going forward, ” Schuster says, adding that partnering with indigenous communities may enable the world’ s countries to better meet a wide range of conservation goals: “ We really need all the help we can get as a global community to prevent species extinction that we’ re facing right now. ”

1. What does the underlined word “ indigenous” probably mean in Paragraph 2?
A.Social.B.Native.
C.Protected.D.Threatened.
2. What did Richard Schuster find in his study?
A.National parks are even higher in species diversity.
B.Indigenous communities overhunted on their lands.
C.Some preserves almost have no formal protection.
D.Indigenous lands do better in keeping bio-diversity.
3. Which of the following statements may Don Hankins agree with?
A.Species diversity depends on geographical positions.
B.Humans’ everyday activities are no longer sustainable.
C.Indigenous groups have a close bond with their lands.
D.Protected areas work perfectly in wildlife protection.
4. What is the text mainly about?
A.Beating back extinction.B.Dealing with environmental problems.
C.Setting up nature reserves.D.Fighting against unsustainable behaviors.

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文章大意:本文为一篇说明文。主要讲述了海豚通过创造独特的声音来展示它们的创造力,它们都有着独特的标志性哨声,科学家通过研究来判定到底是什么影响着它们的标志性哨声。

【推荐1】Young dolphins, within the first few months of life, display their creativity by creating a unique sound. These bleats, chirps and squeaks amount to a novel possession in the animal kingdom — a label that conveys an identity, comparable to a human name.

These labels are called signature whistles(标志哨声), and they play an essential role in creating and keeping relationships among dolphins. While the development of a signature whistle is influenced by learning from other dolphins, each whistle still varies in volume, frequency, pitch(音高) and length.

The scientists found dolphins who live in regions with more seagrass have signature whistles that are higher in pitch and shorter in length when compared to those who live in areas where the seafloor is muddier. Meanwhile, dolphins in smaller groups have whistles that change pitch more often than dolphins in larger groups.

In 2013, researchers discovered that dolphins imitate another’s signature whistle to re-establish contact, at times adding parts of their signature whistle to the call. Moreover, in 2018 a study on male bottlenose dolphins(宽吻海豚) found that they keep their “names” into adulthood just like females—it was previously thought males abandoned their signature whistle to adopt the same whistle as their alliance(同盟) groups.

Dolphins can remember other dolphins after 20 or more years without contact by remembering their whistles, said Jason Bruck, an assistant professor at Stephen F. Austin State University.

Scientists analyzed 188 hours of recorded acoustic data collected by different research groups from 2006 to 2020. These sounds were recorded at six sites across the Mediterranean Sea, which is divided into west and east basins. There is genetic variation(差异) between eastern and western dolphin populations. Accordingly, the eastern and western basins were used as proxies(替代指标) for genetic variation.

The team extracted 168 individual whistles from the recordings and analyzed their acoustic features in relation to a few factors: precise location where the whistle was recorded, whether or not this was in the eastern or western basin, the local ocean environment and population demographics.

Ultimately, the scientists found that location only partially affected whistle variability.

Meanwhile, the environmental conditions and demographic characteristics did appear to strongly influence signature whistles—findings that align with the “acoustic adaptation hypothesis(声学适应假说),” the idea that animals acoustically adapt their vocalizations to their local conditions to optimize the purpose of their sounds. The study claims these are the foundational influences on signature whistle variability.

1. What does Paragraph 3 mainly talk about?
A.What determines the dolphin group size.
B.What influences the differences among signature whistles.
C.How dolphins produce the signature whistles at high rates.
D.How signature whistles convey information about identity.
2. What can be inferred from Paragraph 4?
A.Dolphins influence one another.
B.Dolphins struggle to rejoin social groups.
C.Male dolphins repeat whistles to attract female ones.
D.Signature whistles are unique to bottlenose dolphins.
3. What’s special about dolphins according to Jason Bruck?
A.They innovate their specific sounds to hunt.
B.They behave in the same way as humans.
C.They are stimulated to learn from other dolphins.
D.They are capable of long-term social recognition.
4. Why do scientists analyze the recorded acoustic data of dolphins?
A.To explore if signature whistles can be identified.
B.To investigate the living environment of dolphins.
C.To study what factors influenced signature whistles.
D.To identify the relationship between regions and genes.
2023-01-18更新 | 254次组卷
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文章大意:本文是一篇说明文。文章向读者分析了犬类早期家庭教育对于其后天能力形成及个体发展的影响。通过实验结果进行阐述,并探讨了这一结论是否能被应用于人类身上这一点。

【推荐2】Parenting techniques may have long lasting consequences for behavior—even when it comes to dogs.

Researchers at the University of Pennsylvania studied the early development, parenting and the following performance of 98 puppies who underwent guide dog training. Dogs who received more independence and less support from their mothers were more likely to be successful in becoming a guide dog. The study was published Monday in the journal Proceedings of the National Academy of Sciences.

Mom-pup interactions were used to define how highly involved the puppy’s mothers were.   Puppies raised with highly involved mothers were more likely to be released—or dropped out from the guide dog program—compared to those with less attentive mothers.

“Too much of a good thing can be a bad thing,” said lead study researcher Emily Bray. Although the study couldn’t definitely point to what was driving this effect, “one possibility is that the dogs that are having overbearing(专横的)mothers are never given the chance to deal with small challenges on their own, and is harmful to their later behavior and outcome in their problem solving. Another possibility is that the puppies for whom the mothers are always around are also the most anxious or stressed,” she explained.

“What I was happy about was that there is a study being done about early life experiences in dogs,” another researcher Dolores Hole said. “If the mom is trying to protect her pups against small challenges, then they will not be suited for the big challenges.”

The study included three breeds(品种):German shepherds, Labrador retrievers and Golden retrievers. The puppies were followed from the first weeks of life for several years. Interestingly, Labrador retrievers tended to wash out from the program, while Golden retrievers tended to succeed.

As for whether the findings can be applied to human babies of so-called “helicopter parents,” Bray was hesitant.

“I think people can draw parallels(相似之处), but I think you also have to be careful because they are different species,” she said.

She added, “The nice thing about dogs is that they are a lot less complicated than humans.”

1. What makes successful guide dogs according to the study?
A.Less attentive owners.B.More practical training.
C.Less supportive mothers.D.More tense environment.
2. What does Paragraph 4 mainly talk about?
A.The necessity of mom-pup interactions.
B.Some characteristics of good guide dogs.
C.The significance of high parental involvement.
D.Potential causes of some puppies’ poor performance.
3. What can we know about Labrador retrievers in the study?
A.They choose to stay.B.They fail to be qualified.
C.They rise to challenges.D.They are easy to notice.
4. Which can be a suitable title for the text?
A.Parenting techniques can apply to guide dogs
B.Guide dogs are less complicated than humans
C.Researchers help raise public awareness of blind people
D.A study is done about early life experiences of human babies
2022-08-30更新 | 314次组卷
阅读理解-阅读单选(约400词) | 较难 (0.4)
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【推荐3】China's Bao Yongqing has been named the overall winner of the Wildlife Photographer of the Year competition for 2019, claiming one of the world's top photography awards.

The competition is developed and produced by the Natural History Museum in London. This year's competition, the 55th, drew more than 48,000 entries from 100 countries. The winning entry by Bao, a native of Qinghai province, is titled The Moment. It captures a remarkable standoff between a Tibetan fox and a marmot(土拨鼠), and was taken on the Qinghai-Tibet Plateau. "Photographically, it is quite simply the perfect moment," said Roz Kidman Cox, the chairwoman of the judging panel. "The expressive intensity of the postures holds you transfixed, and the thread of energy between the raised paws seems to hold the protagonists in perfect balance", Cox said. To have captured such a powerful interaction between a Tibetan fox and a marmot — two species key to the ecology of this high-grassland region — is extraordinary. Museum Director Michael Dixon said the picture captured "nature's ultimate challenge——the battle for survival".

Bao, in a group interview on Wednesday, said of the photo: "It is very difficult and rare to capture this kind of moment, so I knew it was something very special. It took about two or three hours to get this photo. I was watching them for a long time. I have paid attention to this competition for a long time, and my first purpose was to show my image to the world, and secondly to protect the environment and my homeland," he said. " In my hometown, everyone looks after the animals, so when I go home with this award, it will be an encouragement to our people to be more protective of animals and the environment." In addition, the photographer said : "This competition is one of the most important among photographers in China, so I wanted to draw people's attention to animal protection. I hope it will introduce a passion for animals to more people."

The exhibition at the Natural History Museum in Kensington will open on Friday and run through the end of May next year, when it will go on a national and international tour. Entries for next year's competition will be accepted beginning on Oct. 21.

1. What does the underlined word "protagonists" in the 2nd paragraph mean?
A.Onlookers.B.Photographers.
C.Hunters.D.Main characters.
2. Which statement is TRUE according to the passage?
A.The Wildlife Photographer of the Year originated from London.
B.The Wildlife Photographer of the Year is a domestic competition in China.
C.The competition drew worldwide attention, making it the best event in photography.
D.Entries are strictly restricted, mainly focused on endangered animals.
3. What is the reason for Bao's winning the award?
A.His capturing a crucial moment between two typical species.
B.His expertise in photography.
C.His passionate devotion to wildlife protection.
D.His publicizing the knowledge of Qinghai-Tibet Plateau.
4. What can we infer from the passage?
A.In Bao’s hometown, everyone looks after animals.
B.Taking photos can sometimes be painstaking.
C.Photograph is sure to raise public awareness of animal protection.
D.The exhibition will go on a tour in China next year.
2020-07-28更新 | 103次组卷
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