Nature is like the mechanism in an enormous clock. Everything is neatly arranged and inter connected. Every individual has its place and its function. Take the wolf for example. As meat-eaters, wolves regulate the number of plant eaters so that they do not multiply too rapidly. All animals and plants are held in a delicate balance.
The wolves remind me of a story from my childhood when my grandfather gave me an old clock. The first thing I did was take the clock apart to find out how it worked. Even though I was convinced that I knew how to put it back together in working order, I couldn’t do it. After I rebuilt it, there were a few cogs (轮齿) left over and a grandfather who was not in the best of moods. In the wild, wolves play the role of such cogs. If we remove them, not only do the enemies of sheep and cattle disappear, but the mechanism of nature also begins to run differently, so differently that rivers change course and many local bird species die out.
And things can also go wrong when a species is added. For example, the introduction of a nonnative fish leads to a massive reduction in the local deer population. Because of a fish? The earth’s ecosystems, it seems, are a bit too complex for us to draw up simple rules of cause and effect. Even conservation measures can have unexpected results. Who knew, for example, that recovering crane (鹤) populations in Europe would affect the production of Iberian ham?
So it’s high time we took a good look at the interconnections between species both large and small. It’s important for us to realize that even small interventions(介入)can have huge consequences, and we’d do better to keep our hands off everything in nature that we do not absolutely have to touch.
1. What does the underlined word “regulate” mean in paragraph1?A.Control. | B.Count. | C.Record. | D.Increase. |
A.Curiosity kills the cat. | B.Grandfather’s love lasts. |
C.Clocks are complex. | D.Every part counts. |
A.Local species die out due to the nonnative one. |
B.Rules of cause and effect are obvious in nature. |
C.The interconnections in nature are complicated. |
D.Conservation projects are too hard to complete. |
A.Show mercy to small animals. | B.Stay away from conservation. |
C.Take a new look at meat-eaters. | D.Think twice before stepping in. |
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【推荐1】Tropical (热带的) forests could become so hot that some kinds of leaves will no longer be able to conduct photosynthesis (光 合 作用), according to a study. The photosynthetic machinery in tropical trees begins to fail at about 46.7℃ on average. The research suggests that forests may be nearing dangerous temperature sooner than expected. Models predict that once we hit a global temperature increase of 3.9℃, these forests might experience mass leaf damage.
Chris Doughty, an associate professor at Northern Arizona University and the lead researcher of the study, said the leaf-warming experiments had revealed a nonlinear rise in temperatures. “We were really surprised that when we warmed leaves by 2, 3 or 4℃, the highest leaf temperatures actually increased by 8℃. This shows a concerning nonlinear feedback that we were not expecting.” said Doughty. “If we adopt a do-nothing response to climate change and tropical forest air temperatures increase by greater than 4℃, there could be massive leaf death.” he added.
Avoiding high emissions (排放) in the first place is key to stabilizing temperatures. “We should do all we can to avoid high-emissions. Under low-emissions, almost all tropical forest tree leaves can avoid death from overheating and the trees will survive,” said Simon Lewis, a professor of global change science at University College London. “Yet what the study doesn’t look at is heatwaves. We still might see tree deaths from overheating for limited periods during heatwaves under lower emissions.”
Researchers suggest that the damage is not yet unchanged. “Vote for people who are serious about addressing climate change and transferring to low-carbon economies, ”Disney, one researcher, advocated. More generally, we can all recognize the importance of supporting those countries and people who live in and rely on tropical forests economically, But the serious changes to tropical forests don’t just affect the local people it’s a global issue.
1. Which of the following can best replace the underlined word “nonlinear” in Paragraph 2?A.Global. | B.Dramatic. | C.Steady. | D.Minor. |
A.Planting more trees. | B.Exploring heatwaves. |
C.Conducting researches. | D.Pursuing low emissions. |
A.Promoting global efforts. |
B.Seeking economic support. |
C.Helping tropical countries. |
D.Boosting low-carbon education. |
A.Global warming harms trees. |
B.Tropical forests lose functions. |
C.Tropical leaves struggle in heat. |
D.Forests near dangerous temperature. |
【推荐2】Ranchers(农场主) and environmental advocates haven’t always seen eye to eye, but the differences between the two aren’t as extreme any more, as more and more ranchers have come around to the understanding that taking good care of the land supports both economic stability and environmental health.
“For some, ranching was pursued in the past with an emphasis on raising beef at the expense of everything else,” says Bill Bryan of the Montana—based Rural Landscape Institute in a recent Christian Science Monitor. “As a matter of necessity, the old way of ranching is giving way to a new pattern. Raising animals for the dinner table isn’t an activity that has to be at odds with the environment.”
According to the nonprofit World Wildlife Fund (WWF), grazing (放牧)—when done right—is key to maintaining biological diversity and ecosystem health across the Northern Great Plains, across 183-million-acre expanse of rangelands spanning five US states and two Canadian provinces.
This vast landscape evolved in harmony with large herbivores (食草动物), such as bison and elk, and must be grazed in order to remain healthy, reports WWF, which works with hundreds of ranchers across the region as part of its Sustainable Ranching Initiative. “Without grazing, woody vegetation, such as juniper and cedar creeps in and kills plants that threatened species, such as grassland birds, need to survive.”
Not surprisingly, many of the ranchers that are following in the forebears’ footsteps have been using what we now call “sustainable ranching practices” for decades already. One example is rotational (轮流的) grazing, that is moving cattle herds more frequently to different pastures(牧场), so they don’t overgraze any one particular patch of land.
A newer “best practice” involves depositing a quarter to half inch of cattle wastes on grazed land to kick-start the soil chemistry below while also absorbing significant amounts of methane (沼气)—the most potent greenhouse gas—before it can head for the atmosphere. This technique is now becoming more commonplace as today’s ranchers care about reducing their carbon footprints like no generation before them.
1. In the first two paragraphs, what does the writer imply about the relationship in the past between ranchers and environmentalists?A.They worked together to reduce the impact of grazing on the environment. |
B.They didn’t look each other in the eyes when they meet. |
C.They had great differences between each other. |
D.They both agreed that raising animals for food benefits the environment. |
A.be favourable to |
B.be in disagreement with |
C.stand a chance with |
D.be unusual for |
A.Many ranchers persist in prioritising raising cattle over anything else. |
B.Grazing done in the right way helps biological diversity and ecosystem. |
C.“Rotational grazing” has been recently employed to raise animals. |
D.Grazing contributes to trees competing favourably with plants. |
A.grazing can be functional in the chemistry field |
B.methane is another powerful greenhouse gas besides carbon dioxide |
C.ranchers tend to remove their footprints as they are grazing |
D.grazing has become more eco-friendly as time goes by |
【推荐3】A Love of Gardening
“If you look the right way, you can see that the whole world is a garden.” These words come from the author of the book The Secret Garden, first published in 1911. At that time, only the very rich in Britain had gardens. Very soon after this, homes with gardens began to be built. This is what started the British love of gardening! Today, millions of Brits like to say that they have “green fingers”, with around half the population spending their free time gardening.
For many people in the UK, their garden is their own private world. Each spring, children plant sunflowers and wait to see which one is the tallest. Expert gardeners know just the right corner for roses, and others spend hours trying to grow perfect vegetables to enter into competitions. And while many Brits like nothing better than spending their Sunday cutting the grass, some are happy just to sit under the branches of the trees and enjoy the beauty of the world around them.
But in cities, limited space has led to people looking for new solutions. Those without outside space can rent small pieces of land on which to grow things. Today, there are over 4,000 people in London waiting for such pieces of land. One recent idea has been to turn rooftops and walls into private gardens. These gardens have helped make the cities greener and improve air quality.
As well as being good for the environment, gardening is also good for the soul. What other free-time activity allows you to be at one with nature and create more beautiful living things? And if you’re in any doubt about this, take a moment to reflect on this line from The Secret Garden: “Where you tend a rose… A thistle cannot grow.”
1. What inspired the British to create their own private gardens?A.A rise in earnings. | B.The call of the government. |
C.The publication of The Secret Garden. | D.The competition among neighbors. |
A.How to build a garden well. | B.Where is suitable for building gardens. |
C.When is the right time to do gardening. | D.How the private garden is enjoyed by the British. |
A.They don’t have free time. | B.They don’t have enough space. |
C.They lack gardening knowledge. | D.They are not allowed to do so by law. |
A.It wastes money. | B.It takes up too much land. |
C.It worsens air quality. | D.It benefits the environment and people’s soul. |
【推荐1】Do you have full confidence in your memory? There has been a discussion about whether it is shi or si in the sentence “Thus when Heaven is about to confer a great office on any man...” (“故天将降大任于是/斯人也”). Most people chose si as what they learned at school. However, People’s Education Press, a leading publisher of Chinese textbooks, claimed on Oct 26 that all its textbooks say shi.
Supporters of si feel shocked and say they’ve experienced the “Mandela Effect” — the situation in which a large number of people believe that an event occurred when it didn’t. Many people believed that former South African president Nelson Mandel died in the1980s in prison. However, Mandela was alive and well, eventually passing away in 2013. US researcher Fiona Broome set up a website to explain her observation of this phenomenon first, coining the term.
Some often joke that our memories have been changed by a strange force. In fact, psychologists have looked into the reasons for the Mandela Effect, as reported on the US-based website Verywell Mind. For example, your mind may fill in gaps missing in your memory to make more sense of it, which is called confabulation (虚构症). However, try not to feel bad — this is not lying, but rather remembering details that never happened.
The Internet may be another reason why we have Mandela Effect events, as the news we read can be false from the beginning. In 2018, Science journal published a study of over 100,000 news stories discussed across Twitter. It showed that false news can spread faster and reach more people than the truth. As a powerful way to spread information, the Internet might be the main reason for falsehoods to enter our minds.
1. What’s the author’s purpose of telling the saying “Thus when Heaven is …”?A.To show our memories can be wrong. |
B.To provide solutions to the discussion. |
C.To raise readers’ interest in the discussion. |
D.To introduce the topic of the Mandela Effect. |
A.Creating. | B.Misunderstanding. | C.Forgetting. | D.Changing. |
A.Attitudes to a particular event. |
B.A kind of psychological effect. |
C.The benefit of good memory. |
D.The effect of Mandela’s death. |
A.False news travels much faster than true stories. |
B.The Internet can also cause Mandela Effect events. |
C.It is harder than ever to read false news at present. |
D.The Internet can make false information avoidable. |
【推荐2】The unusual day of February 29 comes up on the calendar only every four years. In American English, February 29 is called a leap day. And the entire 12-month period with a February 29 in it is called a leap year. The year 2020 is such a year.
As a verb, the word “leap” means to jump, or to move quickly. “Leap” can also be a noun, meaning a jump or a sudden move. In a leap year, the dates jump over one day of the week. In 2017, the last day of the year December 31, fell on a Sunday. In 2018, it fell on a Monday. In 2019, it fell on the Tuesday. But in 2020, December 31 will fall on a Thursday. It just leaps right over Wednesday. “Leap” is also an important word for two American expressions. One is a kind of warning. If you want someone to investigate a situation completely before taking action, you might say “look before you leap”. The other expression is a phrase of hope. Urging someone to “take a leap of faith” invites the person to take action, even if not everything about a situation is known.
Interestingly, both phrases are completely reasonable to say to someone who is about to get married.
On that note, some people choose to marry on February 29 because it is an unusual day. But some ancient people would likely tell couples not to do it. Leap years were believed to be difficult, and leap days were unlucky and a bad time to begin anything new.
Whatever you think about them, the changes in the calendar will be gone soon enough. Then we can return to normal, and leap over February 29 as usual.
1. If December 31, 2121 is Wednesday, what day is December 31, 2124?A.Thursday. |
B.Friday. |
C.Saturday. |
D.Sunday. |
A.When you encourage someone to take action. |
B.When you advise someone not to hold a wedding. |
C.When you warn someone not to make a decision quickly. |
D.When you want someone to investigate a situation carefully. |
A.They were good days to try new things. |
B.They were normal days in leap years. |
C.They were a bad time for getting married. |
D.They were a good time for moving house. |
A.Lucky Days for Couples |
B.Leap Days and Leap Years |
C.The Changes in the Calendar |
D.The Importance of February 29 |
【推荐3】The practice of students endlessly copying letters sentences from a blackboard is now a thing of the past. With the coming of new technologies like computers and smart phones, writing by hand has become something of nostalgic(怀旧的) skill. However, while today's educators are using more and more technology in their teaching, many believe basic handwriting skills are still necessary for students to be successful - both in school and in life.
Virginia Berninger, professor of educational psychology at the University of Washington, says it's important to continue teaching handwriting and help children acquire the skill of writing by hand.
Beminger and her colleagues conducted a study that looked at the ability of students to complete various writing tasks - both on a computer and by hand. The study, published in 2019, found that when writing with a pen and paper, participants wrote longer essays and more complete sentences and had a faster word production rate.
In a more recent study, Beminger looked at what role spelling plays in a student's writing skills. ”Spelling makes some of the thinking parts of the brain active which helps us gain our vocabulary word meaning and concepts. It is allowing our written language to connect with ideas.” Beminger said.
“Spelling helps students translate ideas into words in their mind first and then to translate those words in the mind into written symbols on paper or keyboard and screen,” the study said. Seeing the words in the “mind's eye” helps children not only to turn their ideas into words, says Bemninger, but also to find spelling mistakes when they write the words down and to correct them over time. “In our computer age, some people believe that we don't have to teach spelling because we have spell checks," she said. “But until a child has a functional spelling ability of about a fifth grade level, they won't have the knowledge to choose the correct spelling among the options given by the computer. "
1. What makes writing by hand a thing of the past?A.The absence of blackboard in classroom. |
B.The use of new technologies in teaching. |
C.The lack of practice in handwriting. |
D.The popularity of computers. |
A.It focused on the difference between writing by hand and on a computer. |
B.It showed that students prefer to write with a pen and paper. |
C.It found that good essays are made up of long sentences. |
D.It discussed the importance of writing speed. |
A.Spelling improves one's memory of words. |
B.Spelling ability is closely connected to writing ability. |
C.Spelling benefits the translation from words into ideas. |
D.Spelling slows down finding exact words to express ideas. |
A.Computers can help people with their choice or words. |
B.Spell checks can take the place of selling teaching. |
C.Handwriting still has a place in today's classrooms. |
D.Functional spelling ability develops fast in the fifth grade. |
【推荐1】After a decade of negotiations, nearly 200 countries have agreed to a new United Nations treaty(条约)to protect the world’s oceans, the first of its kind in 40 years. The High Seas Treaty aims to protect 30% of the open oceans by 2030, setting a plan in motion to preserve this vast area.
Oceans cover about 71% of the Earth’s surface and are home to countless species of animals and plants. They play a crucial role in maintaining a healthy planet. However, overfishing and pollution from ships and other sources have severely impinged on many marine (海洋的)species and ecosystems.
The last major UN sea treaty in 1982 described the “high seas” — the parts of the oceans that aren’t controlled by any country — but it did not protect them. The high seas, which account for two-thirds of the ocean, currently have only 1.2% of their massive area protected. A marine protected area(MPA)is an area in the sea with strict rules about fishing and other activities. While more and more countries have established MPAs in their waters, most are not connected, limiting their effectiveness for migratory(迁徙的)species.
Last December, over 110 countries committed to protecting 30% of their land and ocean areas by 2030.The High Seas Treaty now enables the extension of this goal to the entire ocean. It aims to make 30% of the high seas become protected areas by 2030 and requires that proposed activities on the high seas undergo assessment for their potential impact on the ocean environment.
Reaching the agreement was challenging due to differing views on ocean protection among countries, such as limits on fishing or pollution. Disagreements also arose over sharing resources between rich and poor nations, with the latter seeking an assurance that resources benefit everyone, not just those in wealthy countries.
The treaty is not yet final and must be officially accepted at a UN meeting. Then it must be approved and signed by enough countries before it takes effect.
1. What is the main objective of the High Seas Treaty?A.To protect 30% of the open oceans by 2030. |
B.To allow unrestricted fishing on the high seas. |
C.To promote international tourism in marine areas. |
D.To establish new shipping routes on the high seas. |
A.Exchanged. | B.Assisted. | C.Impacted. | D.Defended. |
A.Strict rules of a marine protected area. |
B.Current measures to restrict overfishing. |
C.The limited number of migratory species. |
D.The lack of protection for the high seas. |
A.New Plans to Develop Marine Resources |
B.A New UN Agreement to Preserve Open Oceans |
C.The Treaty Officially Accepted at a UN Meeting |
D.The Cooperation on Sharing Resources Equally |
【推荐2】When we dig to obtain a precious metal, a fuel, or an ancient mine, we remove a chapter of another time. Such materials take millions of years to settle, then only moments to remove with machine and explosive.
Ever since humans first realized that the ground beneath them held hidden riches, we have dug down to discover what lies beneath. Mining makes almost every aspect of our modern lives possible, and often the effects on the natural world are far, far away from home. Unlike many of the changes humanity has brought on the planet’s surface, which will disappear in time, some of our underground doings have left permanent horrible scars(伤疤).
“The underground world for most of us is out of sight, out of mind,” observes geologist Jan Zalasiewicz in England. “Yet it is seeing significant change that in some ways is as striking as any that humans have made to the Earth’s geology, and that is permanent.” At present, while certain tree roots can reach as much as 68 meters deep somewhere in South Africa, miners in that country have dug five kilometers below Earth’s surface in pursuit of gold. The world’s deepest borehole(钻孔)plunges(陡降)more than 12 kilometers into the ground.
“Things like mines and boreholes, even pressed by pressure and chemically changed by underground liquids, are big and obvious holes in the rock. They’re not subtle,” Zalasiewicz says. Zalasiewicz and his co-authors propose a new term for such underground disturbances: “anthroturbation”. The name originates from the word “bioturbation”, which refers to the kind of trace left behind in the Earth by animals such as ants when they dig their homes. Humans take this kind of disturbance to a much deeper level.
“The only way these marks can go away is by coming to the surface and being destroyed, or getting caught up in a continental crash, or some other activities,” Zalasiewicz told me. “Any of these ways for erasing them will take tens to hundreds of millions of years.”
1. What’s the author’s attitude to humans’ underground digging?A.Negative. | B.Approval. |
C.Unconcerned. | D.Neutral. |
A.To show humans’ super ability. |
B.To praise humans’ determination. |
C.To reveal humans’ destructive power. |
D.To introduce humans’ new discoveries. |
A.Apparent. | B.Unnoticeable. |
C.Incredible. | D.Mysterious. |
A.The modern lives depend on the underground digging. |
B.The protection of the underground is well underway. |
C.The underground doings by humans will soon disappear. |
D.The disappearance of the underground scars will take ages. |
【推荐3】“Why do people enjoy saying that they are bad at math?” wonders Petra Bonfert, a professor of engineering at Dartmouth College. After seeing too many examples of adults “passing on mathematical anxiety like a virus, ”Bonfert has an important message for math phobic (恐惧的) parents and educators: “We are passing on from generation to generation the fear for mathematics. ”
Many people hold the view that math is incredibly hard, and only people with an inborn mathematical ability can understand it. While well-meaning adults may think they’re encouraging kids by sharing their own math fears, research has shown the opposite. Research has found that the problem is particularly significant for girls, who “are cspecially affected when a teacher publicly announces dislike of math before she picks up the chalk.” Moreover, a study published recently reported that female mathematical achievement was diminished in response to a female teacher’s mathematical anxiety. The effect was obvious: the bigher a teacher’s anxiety, the lower the scores. Parents’ anxiety about math can have a similar effect on kids’ achievement and their attitude toward the subject.
Fortunately, Sian Beilock, a scientist of Barnard College, has found a surprisingly easy way for parents to stop passing on math anxiety and build their children’s math confidence. The most important finding is the importance of normalizing math at home in a way that’s relaxing and playful: from using math-themed books and stories, playing with math games and toys to cooking together. He argues that we need to teach kids that working on mathematical skills is like practicing a sport. Neither can be learned by watching others perform the activity and both require encouragement and effort. You do not need an inborn mathematical ability in order to solve mathematical problems. Rather, what is required is perseverance, a willingness to take risks and feeling safe to make mistakes.”
1. Why do some people share their math fear with kids?A.To expect kids to learn from their mistake. |
B.To prove only geniuses can learn it well. |
C.To give encouragement to their kids. |
D.To stress the importance of genetic factors. |
A.Reduced. | B.Measured. |
C.Improved. | D.Influenced. |
A.Math is a hands-on subject. | B.In born math ability is essential. |
C.Learning math at home is relaxing. | D.Watching is a way to learn math. |
A.Stop anxiety | B.Ask for teacher’s help. |
C.Solve problems on your own. | D.Be brave to face mistakes. |