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题型:阅读理解-阅读单选 难度:0.65 引用次数:125 题号:10466701

The sixth mass extinction is not a worry for the future. It’s happening now,much faster than previously expected,and it's entirely our fault,according to a study puhlished Mooday.

Humans have already wiped out hundreds of species and pushed many more to the brink of extinction through wildlife trade,pollution,habitat loss and the use of toxic substances. The findings published in the scientific Journal Proceedings of the National Academy of Sciences( PNAS)show that the rate at which species are dying out has accelerated in recent decades.

Gerardo Ceballos González,a professor of ecology at the National Autonomous University of Mexico and one of the authors of the study,said approximately 173 species went extinct between 2001 and 2014. “173 species is 25 times more extinct species than you would expect under the normal extinction rate. ”he told CNN in an email. He and his team found that in the past 100 years,more than 400 vertebrate(脊椎动物的)species went extinct. In the normal course of evolution,such extinctions would have taken up to 10,000 years,they said.

Mass extinctions are just as severe as their name suggests. There have been five mass extinction events in the Earth’s history,each wiping out between 70%and 95%of the species of plants,animals and microorganisms. The most recent,66 million years ago,saw dinosaurs disappear. The past events were caused by catastrophic changes of the environment,including massive volcanic eruptions or collision with an asteroid.

The sixth mass extinction the one happening now—is different:scientists say it’s caused by humans. The researchers also said the current coronavirus(冠状病毒)crisis shows people’s recklessness(鲁莽)towards nature can seriously hurt themselves. Many endangered species are dying in large numbers due to the trade in wild animals and plants.

1. What does the underlined word“toxic”in Para. 2 mean?
A.PoisonousB.Useful
C.AlternativeD.Environment-friendly

2. How does the writer convince readers of the seriousness of the mass extinctions?
A.By listing reliable statistics.
B.By imagining a picture of the extinctions.
C.By mentioning some news from CNN.
D.By explaining the history of the extinctions.
3. What is the purpose of the last paragraph?
A.To tell the difference between the fifth and sixth extinction.
B.To explain the cause of the coronavirus crisis.
C.To warn humans to get rid of their wrong actions.
D.To show the writer’s concern about the endangered species.
4. What does this article mainly talk about?
A.The changes of the environment do harm to wildlife.
B.The sixth mass extinction is much faster than expected.
C.Mass extinctions are just as severe as their name suggests.
D.The current coronavirus has arisen from the illegal trade.

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文章大意:本文是一篇说明文。主要介绍了作为世界文化遗产之一,位于美国佛罗里达州的大沼泽地国家公园的情况。

【推荐1】Everglades National Park (大沼泽地国家公园) is located in the state of Florida. It is the largest wilderness in the entire country and makes up 25% of the wetlands in the state. The park is home to several rare and endangered species. It is also the third largest national park in the US, after Death Valley and Yellowstone. Each year, about 1 million tourists visit the park. On a global level, it has been announced as a World Heritage Site.

Unlike most other national parks, Everglades National Park was created to protect an ecosystem (生态系统) from damage. In 1947, President Harry Truman spoke at the official opening of Everglades National Park, saying the goal of creating the park was to protect forever a wild area that could never be replaced.

10,000 different islands make up Everglades National Park. Each of these islands is lived by natural wildlife. The Everglades is home to about 15 species that are endangered. In addition, more than 350 bird species and 300 species of fresh and saltwater fish live within the park. The Everglades is also home to 40 species of mammals and 50 reptile species.

There are many ways to explore the Everglades. Visitors can see alligators (短吻鳄) while hiking the Anhinga Trail. The Everglades is one of the only places on Earth where freshwater alligators and saltwater crocodiles live in the same area. Visitors using airboats are likely to see large groups of birds. Some visitors might enjoy riding bicycles through Shark Valley. Others may want to move slowly through waters where they can see insects and wildlife closely.

According to experts, changes to the Everglades are becoming a danger to several different kinds of wildlife. They say it is a result of actions the US government began more than 50 years ago, and settlers began even earlier.

1. In the first paragraph, we’re mainly told that ________.
A.Florida is famous for its wetlandsB.the US has three important national parks
C.Everglades National Park is of great valueD.Everglades National Park is popular with visitors
2. How does the author describe the richness of wildness in the park?
A.By listing figures.B.By personally experiencing.
C.By making a comparison.D.By carrying on a study.
3. From the passage, we know that _______.
A.in fact Everglades National Park is a big island
B.visitors are not allowed to stay in the water in the park.
C.President Harry Truman first suggested setting up the park
D.the park is among the few places where alligators and crocodiles live together
4. What would be further discussed if the passage is continued?
A.What the government has done to protect the park.
B.How the park’s environment was badly changed.
C.What readers can do to help to save the wetlands.
D.How important endangered wildlife is to the world.
2018-10-14更新 | 235次组卷
阅读理解-阅读单选(约370词) | 适中 (0.65)
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【推荐2】In the past five years, about 2.8 billion of school textbooks were sold per year, with total spending of 20 billion yuan ($3 billion), news magazine Outlook Weekly reported, citing data released recently by the National Press and Publication Administration.

If these textbooks are reused for one year, the costs saved can be used to help build around 40,000 Hope Schools in impoverished regions.

The figures show that in 2018, the number of retailed textbooks for primary and secondary schools was 2.93 billion copies, totaling 25.99 billion yuan. If all of them are reused, a total of over 20 billion yuan will be saved per year.

Zhao Dehua, in charge of a company recycling resources, said many college graduates sell the textbooks they have accumulated over the years at an average price of 1 yuan per kilogram. As these textbooks are mostly used to produce recycled paper, the cost is even higher than that of raw paper as the processing procedure of recycled paper is complicated.

At present, free textbooks related to music, art and P.E for the nine-year compulsory education have been reused, but account for less than a fraction of the total number of textbooks. Because of the supply chain obstruction, which increases the costs to match supply with demand, the lack of sound platform and service supporting system for the second-hand textbook trade, most of the textbooks used for compulsory education and higher education end up as waste.

“Every year, second-hand booksellers collect textbooks at a price of about 4,000 yuan a ton, which is more than twice the price of ordinary waste paper, but the number of people who come to collect second-hand books is still few,” Zhao Dehua said.

Besides, the incomplete policies and regulations might bring second-hand book sales platforms and sellers to legal risks.

“Establishing the system of textbook recycling can not only save resources, but also help to cultivate students’ consciousness and sense of responsibility,” said Zhu Pin, deputy head of a school of nine-year compulsory education in Jiangxi province. The school has set up a system for reusing the textbooks and the books are disinfected every week.

1. What can we learn from paragraph 4?
A.College students sell textbooks in order to make profits.
B.Recycled paper is mainly used for environmental considerations.
C.The cost of recycled paper is greater than that of raw paper.
D.Certain groups of collectors tend to choose second-hand textbooks.
2. What is the problem of reusing textbooks?
A.It is blocked because of lack of funds.
B.The supply of recycled textbooks is not adequate to meet the demand.
C.The regulation of second-hand textbooks has not been carried out yet.
D.A large number of second-hand textbooks are not used properly.
3. What measures does the school take to use the second-hand textbooks?
A.The school frees recycled textbooks from bacteria regularly.
B.The school proposes regulations for wasting second-hand textbooks.
C.The school calls on students to participate in the system of textbook recycling.
D.The school requests the government’s support.
4. What is the best title for the text?
A.Textbooks recycled for less waste
B.Recycled textbooks used for compulsory education
C.Reusing textbooks good for environment and wallet
D.Reusing textbooks good for collection
2020-12-19更新 | 314次组卷
阅读理解-阅读单选(约360词) | 适中 (0.65)

【推荐3】Even with an injured leg, a tall, grey-crowned crane (灰冠鹤) walks proudly through a bird shelter in the Rwandan capital Kigali. The shelter—called Umusambi Village—has rescued more than 200 cranes from captivity (囚禁). Olivier Nsengimana founded the Umusambi Village in 2015, and runs it together with the government. Umusambi means “grey-crowned bird” in the Kinyarwanda language. In just four years, the organization has helped to increase the population of these endangered birds from 487 to 881.

Before this work began, local neighborhoods were hunting or catching the birds to sell, said Nsengimana. Nsengimana recently explained why this was possibly happening. In Rwanda, the bird is often a symbol of high social position and wealth. So, they are often raised in private homes or hotels.

In fact, six years ago, he said there were more cranes living in captivity in hotels and homes than in the wild. Nsengimana added that poverty and a lack of awareness (意识) of animal protection in the local neighborhoods also led them to catch and sell the birds illegally. He said raising awareness of their endangered position is helping to protect the birds.

For Nsengimana, his own love of the bird goes back to his childhood. He grew up in a village filled with grey crowned cranes. They not only woke up people in the morning, but they also provided entertainment.

Some of the rescued birds are brought to the village after being injured by illegal hunters. Others come from homes where their owners broke their legs or cut their wings to prevent them from flying away.

At Umusambi Village, the cranes are able to recover. When they are healthy enough to survive in their natural environment, Nsengimana sets them free in a protected forest. However, the cranes are still endangered by illegal hunting and by the destruction of their natural environment. This is happening not only in Rwanda, he said. Cranes are endangered in many other parts of the world, including North America.

1. What is a reason for the illegal selling of the birds?
A.Local people knew little about protecting them.
B.The government didn’t take measures.
C.Their population was too large.
D.They could bring good luck.
2. What happened to the cranes before Nsengimana took action?
A.They lost their homes.B.Many of them got hurt.
C.They were used to tell timeD.They were hunted for meat
3. What may be the future of these rescued birds?
A.Staying in the Village forever.B.Being kept with kind people.
C.Moving to public parks.D.Living in the wild.
4. Which of the following can be the best title for the text?
A.Man Reminds People to Protect Endangered Birds.
B.Birds Become a Symbol of Wealth in Rwanda
C.Man Saves Endangered Birds in Rwanda
D.Birds Are Part of People’s Life in Rwanda
2022-01-19更新 | 101次组卷
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