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题型:阅读理解-阅读单选 难度:0.65 引用次数:131 题号:17862722

Despite not being documented by researchers since 1968, the sengi(象鼩), a tiny big-eyed mouse with a long tail and a trunk-like nose that’s native to Somalia, was rediscovered living in well-preserved habitat in neighboring Djibouti this year, and in quite healthy numbers.

An exploration beginning in 2019 looked to use local knowledge about the sengi from the people of Djibouti who said it was still there. Sure enough, it took only one trap filled with coconut, peanut butter and yeast to find the little guy.

“It was surprising,” said Steven Heritage, a research scientist at Duke University in the US. “When we opened the first trap and saw the little tuft of hair on the tip of its tail, we just looked at one another and couldn’t believe it. A number of small mammal(哺乳动物)surveys since the 1970s did not find the Somali sengi in Djibouti — it was indeed a serendipitous discovery.”

One of the least understood members of the 20 species-strong elephant shrew genus(象鼩属), the sengi lives in habitats that are unsuitable for most human activities, allowing it to remain relatively undisturbed and safe.

“Usually when we rediscover lost species, we find just one or two individuals and have to act quickly to try to prevent their extinction,” said Robin Moore, of the Global Wildlife Conservation (GWC) group.

The team set 1,000 traps and caught 12 of the little shrews while making the first video and photographic documentation of the animal for science. Along with rediscovering the species, the team gathered DNA samples(样本)which later showed the Somali sengi to be more closely related to sengis in other corners of Africa like Morocco and South Africa.

This finding has suggested that the Somali sengi needs to be placed in a new genus — moving from Elephantulus to Galegeeska.

Like all great discoveries in science, the questions answered are only equal to the new mysteries presented, but the researchers’ work has highlighted Djibouti as a biodiverse(具有生物多样性的)nation worthy of scientific study. With any luck, perhaps more discoveries are waiting to be made among its desert and salt lakes.

1. What made the finding of the Somali sengi special?
A.It was rediscovered by Somalis.
B.It looked surprisingly different.
C.It reappeared in Africa after more than 50 years.
D.It had become smart enough to avoid being trapped.
2. What does the underlined word “serendipitous” in paragraph 3 mean?
A.Unrealistic.B.Professional.C.Accidental.D.Individual.
3. What does paragraph 4 mainly tell us?
A.How the Somali sengi manages to survive.
B.Why the Somali sengi can live peacefully.
C.How human activities affect the Somali sengi.
D.What environment the Somali sengi should live in.
4. How did the team know the relationships between the Somali sengi and other sengis?
A.By doing DNA tests for them.B.By studying their living habits.
C.By comparing their appearances.D.By studying documents about them.
【知识点】 动物 说明文

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【推荐1】The Australian environment department has not finalised a single recovery plan for threatened species in nearly 18 months. The last time the department completed a recovery plan was in June last year. And the department says it has no time frame for addressing the other requests for recovery plans, which include the critically endangered animal Leadbeater’s possum (澳洲负鼠).

Recovery plans are documents that outline key facts about endangered animals and plants, threats to their survival, and what should be done to prevent their extinction. Under national laws, it is the environment minister who decides whether a species requires a recovery plan. Once a plan is adopted, the minister cannot make any changes that might harm the plan. It has been previously reported that less than 40% of the listed threatened species have a recovery plan. A further 10% have been identified as requiring a recovery plan but those plans haven’t been developed.

The Australian Conservation Foundation said the exposure was “shocking” and accused the department of prioritizing the economic development over environmental protection. “The fact that iconic (最具代表性的) species like the possum still don’t have a recovery plan highlights how broken the system is,” James Trezise, a policy analyst at the Foundation, said. “It is a critical issue that the development and implementation of these plans seem to be optional. These plans should be developed, as required by law, and their implementation should be funded.”

Trezise said the significant delay in developing the plans stood “in sharp contrast” to the government’s rush to carry out environmental assessments for major projects like the one for the mining company Rio Tinto. “The department’s priorities are all wrong,” he said. “They can bring bills before the congress for mining projects that harm the environment, but they can’t get just one recovery plan for a threatened species completed.”

He said the delays would push more species closer to extinction. He called on the government to urgently address the issue and commit more resources to recovery planning. But for now, officials could not tell when the delays would be addressed, saying it would “take a very long time”. Emma Campbell, a senior official, said the department was working with an independent scientific committee to “reevaluate” which species should have a recovery plan.

1. The underlined phrase “the exposure” (Line 1, Para 3) refers to ______________.
A.the coming extinction of many endangered animals
B.the lack of funding for the implementation of the plan
C.the denial of the critical situtaion facing some species
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C.They document how endangered animals interact with humans.
D.They cover more than half of the threatened species.
3. What can be inferred from the passage?
A.The government has not done enough about the recovery plans.
B.The endangered animal possum will be extinct in 18 months.
C.The government prioritizes Rio Tinto over mining projects.
D.The independent committee is vital to addressing the issue.
4. What might be the best title of the passage?
A.Environment department accepting bribes
B.Endangered animal protection with no funding
C.Threatened species at risk with no recovery plans
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Thanks to Al technology, researchers in the Qilian Mountains National Park no longer need to rack their brains in search of snow leopards hiding in the wild. “The forest keepers can now locate a snow leopard from 1,000 pictures in only about 20 minutes, much faster than before,” said Huang Xiangqi, one of the technology’s developers. “We hope we can combine monitoring data with field investigations to help researchers identify the snow leopards so as to draw up a more specific plan for their protection.”

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2022-01-27更新 | 116次组卷
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The researchers conducted two tests involving food rewards with 40 wild-born chimpanzees in Republic of Congo. The chimpanzees voluntarily participated in the games to receive food treats.

Chimpanzees experience adolescence at about 8 to 15. Like humans, chimpanzees show rapid changes in hormone levels during adolescence,start forming new bonds with companions, show increases in aggression and compete for social status.

In the first test, adolescent and adult chimpanzees could choose between two containers in a gambling (投机) task. One container always contained peanuts, a food that chimpanzees somewhat like. Hidden in the other one was either an unlined food — a cucumber slice — or a favorite food — a banana slice. The chimpanzees could play it safe and get the peanuts, or take a chance for some greatly desired banana at the risk of ending up with unappetizing cucumber. The chimpanzees’ emotional reactions were recorded, including angers, screams, or sticking on the table.

During several rounds of the test, adolescent chimpanzees took the risky option more often than adult chimpanzees, but adolescents and adults had similar negative reactions when they received cucumber.

The second test, modeled after the famous “marshmallow test” with human children, examined delayed satisfaction where chimpanzees could receive one banana slice immediately or wait for one minute to receive three slices. Both adolescent and adult chimpanzees chose the greater delayed reward at a similar rate. Human teens lend to be more impulsive (冲动) than adults so they would be more likely to take the immediate reward.

“Prior research indicates that chimpanzees are quite patient compared with other animals, and our study shows that their ability to delay satisfaction is already mature at a fairly young age, unlike in humans,” Rosati said.

Risk-taking behavior in both adolescent chimpanzees and humans appears to be deeply biologically rooted, but increases in impulsive behavior may be specific to human teens.

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2. What does the underlined expression “play it safe” in paragraph 4 mean?
A.Give it a try.B.Take an action.
C.Play with fire.D.Avoid taking risks.
3. How might chimpanzees feel after getting the cucumber in the experiment?
A.Puzzled.B.Delighted.C.Disappointed.D.Surprised.
4. What is the finding of the second test?
A.The chimpanzees prefer bananas to any other reward.
B.Human adolescents tend to enjoy the instant satisfaction.
C.Human teens’ ability to delay satisfaction develops better.
D.The chimpanzees are impatient to wait for delayed rewards.
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