Sweden is so good at recycling that, for several years, it has imported rubbish from other countries to keep its recycling plants going. Less than 1% of Swedish household waste was sent to landfills(垃圾填埋场) last year or any year since 2011.
We can only dream of such an effective system in the UK, which is why we end up paying expensive transport costs to send rubbish to be recycled overseas rather than paying fines to send it to landfills under The Landfill Tax of 1996.
Sweden has a culture of looking after the environment. “We Swedish people are aware of what we need to do on environmental issues. We worked on communications for long to make people not throw things outdoors so that we can recycle and reuse,” says Anna-Carin Gripwall, director of communications for Avfall Sverige, the Swedish Waste Management’s recycling association.
Over time, Sweden has carried out a national recycling policy so that even though private companies undertake most of the business of importing and burning waste, the energy goes into a national heating network to heat homes through the freezing Swedish winter.
However, some people argue that the country is escaping real recycling. Paper plant managers say wood fiber can be used up to six times before it becomes dust. If Sweden burns paper before that point, it’s exhausting the potential for true recycling and replacing used paper with fresh raw material.
Ms Gripwall describes Sweden’s policy of importing waste to recycle from other countries as a temporary situation. “There’s a ban on landfill in EU countries, so instead of paying the fine they send it to us as a service. They should and will build their own plants, to reduce their own waste, as we’re doing in Sweden,” Ms Gripwall says.
1.Why is a low amount of household waste sent to landfills in Sweden?
A.A little bit of household waste is produced here.
B.Its people get waste recycled at home.
C.Much rubbish is imported overseas.
D.They have good public environmental awareness.
2.What measure is taken in the UK to deal with waste according to the text?
A.An effective recycling system is adopted.
B.People are encouraged to sell rubbish abroad.
C.People are forbidden to send waste to landfills.
D.An increasing number of landfills are being built.
3.What can we infer about Sweden’s recycling system?
A.It’s being spread around the world.
B.It’s also thought to have some shortcomings.
C.It’s so perfect to receive good evaluation.
D.It solves the problems with the local energy.
4.What opinion should Ms Gripwall hold according to the text?
A.It’s partly wrong to import rubbish from other countries.
B.The technology of handling waste will be developed wildly.
C.It’s possible to completely solve all environmental problems.
D.All countries should work together to protect the environment.
高一英语阅读理解困难题查看答案及解析
We take showers and use the toilet every day to get rid of bodily waste. Our brains also need to take a bath every day. How can they do it?
A 2013 study found the answer. Researchers at the US University of Rochester studied the brains of mice and discovered that they cleaned themselves while the mice slept. A kind of fluid (液体) in the brain, called cerebral spinal fluid (CSF, 脑脊液), was found to increase dramatically (显著地) during sleep, washing away waste proteins that had been building up between brain cells in waking hours.
“This study shows that the brain has different functional states when asleep and when awake,” Maiken Nedergaard, the lead researcher, told NBC News. It also explains why we can’t seem to think clearly after a sleepless night while a good night’s sleep leaves us feeling sharp and refreshed.
Now a new study, published on Oct. 31 in Science, digs a little deeper into our brains’ self-cleaning procedure. Instead of mice, this time humans were the test subjects.
Researchers at Boston University, US, monitored the brainwaves of 13 healthy adults who were sleeping, using accelerated FMRI (核磁共振成像), which is capable of recording faster changes inside the brain than a regular FMRI machine. They found that every 20 seconds, blood flowed out of the brain, making room for a large amount of CSF to come in and “clean”. This cycle coincided with (与....一致) the rhythm of the brain’s slow waves—an electrical activity that happens when we’re in a deep sleep.
It’s still unknown how these brain activities are connected. But the mere fact that they are connected is exciting enough, since it allows researchers to piece together (拼凑出) possible new explanations for misunderstood diseases.
For example, slow-wave sleep has been proven to play a role in strengthening our memories. This may explain why people with Alzheimer (阿尔茨海默病) often have fewer and weaker slow brainwaves. Based on this new study, there could be one more explanation for diseased brains: They are not clean.
Nedergaard, leader of the 2013 study, is also excited about the new findings. “Maybe the most important take-home message is that sleep is a serious thing,” she told Scientific American. “You really need to sleep to keep a healthy brain because it links electrical activities to a practical ‘housekeeping’ function.”
1.What did the researchers find when they studied the brains of mice?
A.CSF in their brains decreased when the mice slept.
B.More waste proteins were produced in their brains during sleep.
C.CSF carried away waste proteins in their brains during sleep.
D.The more CSF was in their brains, the fewer proteins were there.
2.What did the researchers discover when they monitored human brainwaves?
A.It took 20 seconds for CSF to clean brains.
B.Brains were “cleaned” when blood flowed out.
C.The rhythm of the brain was slower than that of CSF.
D.The brains worked more slowly when asleep.
3.What are the last three paragraphs mainly about?
A.The significance of the research.
B.The features of slow-wave sleep.
C.The importance of having a good sleep.
D.The connections between these brain activities.
高一英语阅读理解困难题查看答案及解析
The three phases of life are increasingly a thing of the past.Where once working lives fitted neatly into the model of education,employment and then retirement,the simplicity of that division is being challenged by changing standards of the workforce.
Increasing numbers of workers,nearing their long-imagined transition(过渡)into retirement,seem to be actively putting off the moment at which they down tools.Newly released figures from the Office for National Statistics(ONS)have shown that there are over a million more over 50s in part-time work than a decade ago.And with nine out of 10 employers reporting difficulties hiring workers,there’s likely to be a growing market for their talents as bosses extend their searches to older people,including those who are willing to take on part-time responsibilities.
The ending of the three phases of working life isn’t simply down to people living longer or financial necessity-though those are certainly important factors-but also to an increasing desire to maintain a purposeful life. One survey of British retirees over 50 found that 85 per cent of them felt they’d retired too young—stopping working had left a void that they regretted afterwards.
The 2015 film The Intern conveyed this human need to have value.In it,Robert De Niro plays a 70-year-old widower who finds himself a fish out of water when he joins a trendy internet start-up.In the end,not only does he find the sense of belonging that he desires but his colleagues come to rely on his experience and different perspective.It’s a plot we can increasingly expect to happen in real-life offices over the decades to come as people live ever longer.
Already,we are seeing people in their 50s and 60s looking ahead to a retirement lasting 30 years,choosing instead to build second careers that they can maintain into their 70s or beyond. Freed from the financial burden of young children,they can prioritize flexibility,shorter working hours or more rewarding jobs in areas such as charity work or teaching.Many do it for no money at all,volunteering behind the till in charity shops or showing people round National Trust properties.
However,it’s the next generation where the effect of living longer will really be felt,and the financial necessity will start to bite.In the West,more than half of the children born in 2016 have a life expectancy of more than 100 years.In their book,The 100-Year Life,London Business School professors Lynda Gratton and Andrew Scott suggest that acquiring sufficient funds to see oneself through a 40-or 50-year retirement will likely be beyond all but the highest earners.
Then there’s the oft-repeated claim that young people today are the first generation to be poorer than their parents.Certainly property prices are changing the way they plan for the future. In the mid-Nineties,the average home cost less than three times the average wage;last year, ONS stats placed that ratio at eight times wages.
The overall effect of these trends is that young people recognize that they will likely have to postpone dreams of retirement and instead strap on(绑住)more debt spread over longer spans.It’s why 44 per cent of under 30s say they expect to be working well into their 70s and why data this year from the Bank of England show that 16 per cent of UK mortgages(按揭贷款)now have terms of 35 years or more-a figure that has tripled in the past decade.
All of these factors look set to contribute to a workforce that has a significantly wider range of ages in the future.In an ra of work when we’ve all learned to be more inclusive,only eight per cent of firms with a diversity programme have adapted it to go beyond gender,race and sexuality and into age.Incorporating older employees into the workforce is set to be the next big thing at the office.
If Robert De Niro has anything to teach us,it’s that this can be an enormous force permanently for both employees and businesses.
1.The following may account for the ending of the three phases of working life EXCEPT_____.
A.a longer life
B.financial needs
C.delayed retirement policy
D.a meaningful life
2.What do the underlined words”is down to”in Paragraph 3 mean?
A.is caused by
B.results in
C.is responsible for
D.gives birth to
3.What trend will the next generation face?
A.They can live within their means.
B.Their life expectancy will be longer.
C.They will be richer than their parents.
D.They will fail to pay off their mortgage.
4.The author introduces the details of the film The Intern in order to_____.
A.tell us Robert De Niro is a helpful retiree
B.indicate that retirees can also benefit society
C.share Robert De Niro’s second career with us
D.illustrate that retirees desire to live meaningfully
5.What does the passage mainly talk about?
A.The new standards of the workplace.
B.Age being no hurdle in the modern world of work.
C.Financial issues facing both old people and young people.
D.Different attitudes to retirement between the young and old.
高一英语阅读理解困难题查看答案及解析
Imagine being face-to-face with a woolly mammoth (猛犸象) . It would be quite a sight. Scientists believe it would tower above 11 feet tall and have a sloping back, a long, powerful trunk, and sharp, curved tusks that stretch up to 10 feet. Its thick hair would be up to three feet long. It would weigh six tons—about as heavy as a bus.
You’ve probably never seen a giant furry elephant before. Actually, you definitely haven’t. The species has been extinct for thousands of years.
But a few years from now, you might be able to see a woolly mammoth in person. Scientists believe they have the technology to recreate it.
A team of South Korean and Russian scientists plan to clone a woolly mammoth. How will they do it?
Several woolly mammoth bodies have already been discovered in Siberia, an icy region in Russia. The scientists plan to take cells from these frozen mammoths. In a laboratory, they’ll use them to create a new cluster (群) of cells called an embryo. The embryo will be placed into the womb of a living female elephant. That elephant will then give birth to a baby woolly mammoth.
The scientists believe the whole process will take five years. Many scientists and animal lovers can’t wait. It will be so exciting to be able to bring a creature that has been extinct for thousands of years back to life. People would travel from around the world for the chance to see a living woolly mammoth. By observing the way the creature looks and acts, scientists might make brand-new discoveries about the history of animal life.
Other experts aren’t so sure about the woolly mammoth project. One big question is what to do with a mammoth. The Earth has changed in the thousands of years since these animals roamed the planet. Where would the creature live, and would it be able to survive in today’s climate ? Some believe that the money being spent on the experiment could be better spent on other important scientific projects, such as fighting diseases.
But the South Korean and Russian scientists are sticking to their plan. They admit they have a big challenge ahead. There is no guarantee that they will succeed, but they’ re hopeful.
1.The first paragraph describes the mammoth’s ________.
A.habitat B.food
C.appearance D.lifespan
2.What is the challenge for scientists to clone a mammoth?
A.Whether they have enough money for the project.
B.Whether the mammoth can adapt to the new environment.
C.Whether the mammoth can survive the modern diseases.
D.Whether their plan wins support from the public.
3.The last paragraph implies that the attitude of scientists to cloning mammoths is ______.
A.negative B.disapproving
C.optimistic D.doubtful
4.What’s the main idea of the passage?
A.Scientists are finding ways to deal with mammoths.
B.Scientists try to find out the history of animal life.
C.Scientists plan to bring the mammoth back to life.
D.Scientists pay little attention to the return of the mammoth.
高一英语阅读理解困难题查看答案及解析
Bees play a vital role in the world. Unfortunately, bees are dying by the second.
The main purpose of bees is to make honey. Honey, shockingly, does not exist for human consumption, it is essential to the insects. Honeybees store honey in their hives (蜂巢) in order for the bees to have energy for their flight muscles and for heating the hive during the winter period. They collect pollen (花粉) which supplies protein for young bees to grow.
According to Honey, com, the increased production and quality of agricultural crops as a result of honey bee pollination is valued more than $14.6 billion per year. These insects are responsible for over 70 of the fruits and vegetables we eat today, including apples, grapes, coffee, beans, and broccoli.
So if they are so valuable to agriculture, why do they keep dying off? A key suspect seems to be pesticides (农药). Honeybees who are exposed to pesticides result in the damage to their neurological (神经的) functions, specifically memory or behavior. And that’s why the majority of worker bees disappear and leave behind a queen, plenty of food and a few nurse bees to care for the remaining immature bees and the queen. There are several other causes to the decline of bees, including the destruction of natural habitat, like woodlands, forests, and other habitats for bees. Climate change is also a factor in the decline of the wild bee population.
Actually, there are a variety of methods to help the bee population grow. One way is to start your own organic garden by planting bee-friendly plants. Pesticides are used in both industrial practices and even in your home, so it is best to find organic seeds and weed killers.
1.Why do honeybees store honey in their hives?
A.To provide enough honey for human to consume.
B.To draw protein out of honey for young bees.
C.To help attract other insects and make hives stronger.
D.To strengthen bee muscles and heat hives in winter.
2.Apples and beans are mentioned in the third paragraph to show that ________.
A.bees supply human beings with basic food
B.bees mainly live on these agricultural crops
C.bees are of great importance to fruits and vegetables
D.bees can bring in more money for famers every year
3.What is most likely to cause the worker bees to leave their hives behind?
A.The lack of food.
B.The abuse of pesticides.
C.The fighting among bees.
D.The destruction of the habitats.
4.What would the author probably discuss in the paragraph that follows?
A.Another way to save bees.
B.Other tips for choosing seeds.
C.More methods to plant green organic fruits.
D.Causes of the decline in the wild bee population.
高一英语阅读理解困难题查看答案及解析
We've known for years that plants can see,hear,smell and communicate with chemicals.Now, reported New Scientist,they have been recorded making sounds when stressed.
In a yet-to-be-published study, Itzhak Khait and his team at Tel Aviv University, in Israel, found that tomato and tobacco plants can make ultrasonic(超声的)noises. The plants "cry out" due to lack of water,or when they are cut. It's just too high-pitched(音调高的)for humans to hear.
Microphones placed 10 centimeters away from the plants picked up sounds in the ultrasonic range of 20 to 100 kilohertz(干赫兹)。Human hearing usually ranges from 20 hertz to 20 kilohertz."These findings can change the way we think about the plant kingdom,”they wrote.
On average,"thirsty"tomato plants made 35 sounds an hour,while tobacco plants made 11. When they were cut,tomato plants made an average of 25 sounds in the following hour,and tobacco plants 15.Unstressed plants produced less than one sound per hour,on average.
Perhaps most interestingly,different types of stress led to different sounds.The researchers trained a machine-learning model to separate the plants' sounds from those of the wind,rain and other noises of the greenhouse.In most cases,it correctly recognized whether the stress was caused by dryness or a cut.Water-hungry tobacco appears to make louder sounds than cut tobacco,for example.Although Khait and his colleagues only looked at tomato and tobacco plants,they think other plants also make sounds when stressed.
If farmers could hear these sounds,said the team,they could give water to the plants that need it most.As climate change causes more droughts,they said this would be important information for farmers. "The sounds that drought-stressed plants make could be used in precision(精准) agriculture, "said Anne Visscher at the Royal Botanic Gardens,Kew,in the UK.
Khait's report also suggests that insects can hear the sounds up to 5 meters away and respond. For example,a moth(蛾子)may decide not to lay eggs on a water-stressed plant.Edward Farmer. at the University of Lausanne,Switzerland,is doubtful.He said that the idea of moths listening to plants is"a little too speculative”。
If plants are screaming(尖叫)for fear of their survival,maybe we should be glad we can't hear them.
1.Paragraph 3 mainly explains_______.
A.where humans differ from plants
B.how the research was carried out
C.what the findings of the study are
D.why humans can't hear the cries of plants
2.Which of the following is TRUE according to the study?
A.All plants make sounds when they feel hungry.
B.Stressed plants make more sounds than unstressed ones.
C.Tobacco plants are more afraid of thirsty than being cut.
D.The more stressed a plant is,the louder sounds it makes.
3.What does the underlined word"speculative"in Paragraph 7 probably mean?
A.Surprising.
B.Uncertain.
C.Incorrect.
D.Unique.
4.What is the best title for the text?
A.Deaf humans
B.Stressed plants
C.Silent screams
D.Precision agriculture
高一英语阅读理解困难题查看答案及解析
Actor Kirk Douglas, who was in Hollywood’s golden age, died on February 5th, 2020. He was 103 years old. His son, actor Michael Douglas said, “To the world he was a legend, a humanitarian (人道主义者), an actor who lived from the golden age of movies well into his golden years.”
Born on December 9th, 1916, in Amsterdam, New York, Douglas changed his name to Kirk Douglas before entering the Navy during World War II. Before serving in the war, he made his Broadway debut (首秀) in the musical Spring Again. After he left the Navy in 1944, he returned to act in New York in the theater, commercials and radio.
By the late 1940s and early 1950s, Douglas had turned to film and began to be a box office heavyweight. Champion, the 1949 film about a boxer, earned him his first Oscar nomination (提名). He acted in several Westerns throughout his career, beginning with 1951’s Along the Great Duide. He also applied his service experience in Hollywood films such as Top Secret Affair, Paths of Glory and Seven Days in May. Douglas was perhaps best known for his leading role in 1960’s Spartacus, which he also produced. He was also praised for his more lighthearted role in 20,000 Leagues under the Sea.
The Hollywood great was nominated for Academy Awards three times throughout his career, and was presented with an honorary Oscar in 1996. In the same year he suffered a stroke, seriously damaging his ability to speak. However, it never kept him out of the public eye. Following recovery, Douglas wrote a book My Stroke of Luck in which he said his life changed for the better. He wrote several other books, including three memoirs (回忆录). Douglas also returned to the screen three years later in the films Diamonds. It Runs in the Family and Before I Forget.
1.Which of the following things about Kirk Douglas happened first?
A.Serving in the war.
B.Returning to act in the theatre.
C.Writing several books.
D.Making the Broadway debut.
2.What can we learn from the passage?
A.Kirk’s experience in the Navy played a role in some of his films.
B.Kirk became more famous after his recovery from his illness.
C.Kirk won Academy Awards four times throughout his career.
D.Kirk’s success was mainly due to the golden age of movies.
3.How can Kirk Douglas be described during his illness and recovery?
A.Honest.
B.Discouraged.
C.Optimistic.
D.Upset.
高一英语阅读理解困难题查看答案及解析
If you are over 20, look away now. Your cognitive (认知的)performance is probably already on the wane. The speed with which people can process information decreases at a steady rate from as early as their 20s.
A common test of processing speed is the “digit symbol substitution test”, in which a range of symbols are paired with a set of numbers in a code. Participants are shown the code, given a row of symbols and then asked to write down the corresponding number in the box below within a set period. There is nothing cognitively challenging about the task: levels of education make no difference to performance. But age does. Speed declines as people get older.
Why this should be is still uncertain, but a range of tentative(尝试性的)explanations has been put forward. One points the finger at myelin, a white, fatty substance that coats axons, which carry signals from one neuron to another. Steady reductions in myelin as people age may be slowing down these connections. Another possibility, says Timothy Salthouse, director of the Cognitive Ageing Laboratory at the University of Virginia, is exhaustion of a chemical called dopamine(多巴胺).
Fortunately, there is some good news to go with the bad. Psychologists distinguish between “fluid intelligence”, which is the ability to solve new problems, and “crystallised intelligence”, which roughly equates to an individual’s stock of accumulated knowledge. These reserves of knowledge continue to increase with age: people’s performance on vocabulary and cognitive decline. In an old but instructive study of typists ranging in age from 19 to 72, older workers typed just as fast as younger ones, even though their tapping speed was slower. They achieved this by looking further ahead in the text, which allowed them to keep going more smoothly.
What does all this mean for a lifetime of continuous learning? It is encouraging so long as people are learning new tricks in familiar fields. “If learning can be absorbed into an existing knowledge base, advantage favours the old,” says Mr Salthouse.
1.The phrase “on the wane” (in paragraph 1) is closest in meaning to _______.
A.declining B.improving
C.varying D.maintaining
2.By “age does” (in paragraph 2), the writer means that _______。
A.the level of a participant’s education is related to how old he is
B.the older a participant is, the more slowly he writes down the number
C.a participant’s age affects his ability to figure out what the symbol means
D.how much time a participant is given to finish the task depends on his age
3.What can be inferred from the passage?
A.Dopamine has been proved to be a chemical that affects people’s cognitive ability.
B.One way to avoid cognitive decline is to have as much experience as possible in life.
C.Moving older workers into an entirely new area of knowledge is less likely to go well.
D.Crystallised intelligence plays an important role in keeping people alert in new situations.
4.What is the passage mainly about?
A.Why the brain fails with the age needs to be explored.
B.“Digit symbol substitution test” proves to be groundless.
C.One’s knowledge base matters more than his cognitive ability.
D.The brain changes in both good and bad ways as one ages.
高一英语阅读理解困难题查看答案及解析
With the start of the new term, the students around the country exchange their fun and fashionable clothes for boring school uniforms. But not all schools are fashion deserts. Colorful sports shoes, school bags, T-shirts and even drink containers are breathing life into campuses.
"The uniform makes us look like a bunch of clones, especially when we are doing morning exercises on the playground," said Qing Pei, a Senior 2 from Shanghai Qibao High School. "But the boys wear different sports shoes and girls have different decorations in their hair. These are the areas where you can express
yourself," said Qing.
Although it might be strange for boys to talk about fashion, they do care about what they wear in school, especially shoes, according to Qing.
"Nike and Adidas basketball shoes, although they are still the must-have items for many of my friends, are becoming out-of-date," Qing added. He explained that "Since Liu Xiang ran so fast in Athens, running shoes are becoming popular in this autumn. "
"Still in fashion are the various baseball caps and American-style T-shirts with random (随意的) English words printed on them," said Qing. "The accuracy of the written message is not important. Often, the words are misspelt. Sometimes they do not even make sense, "Qing said with a smile.
Besides sports shoes and T-shirts, styles and colors of school bags are another opportunity for students to express their taste in fashion. Some bags are made more eye-catching by decorating them with small hanging dolls.
Other fashionable items are the colorful drink containers which are now popular among girls this term.
"Some teachers are surprised to see a teenager sucking a bottle like this at school and criticize it as a childish regression (退化). But some girls just love it," said Yang Rui, a Senior 3. from High School attached to Xi’an Jiaotong University.
1.Which is NOT the way girls show their personality at campuses?
A. They wear different sports shoes.
B. They take stylish and colorful school bags.
C. They have different decorations in their hair.
D. They drink water from colorful drink containers.
2.What are becoming fashionable for school-boys according to this news story?
A. Nike and Adidas basketball shoes.
B. Baseball caps and American-style T- shirts.
C. Colorful drink containers.
D. Running shoes.
3.The underlined word “they” refer to ______.
A. American-style T-shirts
B. The English words on the T-shirts
C. Baseball caps
D. The students around the country
4.Which conclusion of the following is WRONG?
A. Students go to extremes in dressing.
B. Students also like to follow fashion trends.
C. Students nowadays like to be more individual.
D. Students don’t care much whether the words printed on caps or T-shirts make sense or not.
高一英语阅读理解困难题查看答案及解析
How Plants Branch Out to Access Water
New research has discovered how plant roots sense the availability of water in soil and then adapt (适应)their shape to acquire water. The discovery could enable crops to be raised which are more adaptive to changes in climate conditions, such as the absence of water, and help ensure food safety in the future.
These findings, published in the journal Science, describe a new mechanism(机制) discovered by cooperating teams at the universities of Nottingham and Durham.
Roots are very important for plants to acquire water and nutrients(营养)from the soil. Water is necessary to plant growth , yet changing climatic conditions makes acquiring water from soil even more challenging. Plants are able to adapt to different soil moisture(湿润)conditions by changing their roots.
The researchers discovered that plant roots lacking a branching master gene were no longer able to branch out. They found that when roots have access to moisture, the certain gene remains active and promotes root branching, but when put in air, the gene is in activated, preventing root branching. The research has identified the certain protein which can inactivate root branching.
Professor Sadanandom explained: "This is hugely exciting as it opens up the possibility for us to help develop plants that could continue to branch roots even in challenging conditions such as the absence of water.''
Professor Bennett concluded: "Water is the key to plant growth, development and their survival. By studying how plant roots change their branching in response(回应)to water availability, we have uncovered a new mechanism. This opens the way to develop new crops better adapted to climate change and to help deliver global food safety."
It is absolutely imperative to ensure food safety worldwide. Crop production must double by 2050 to keep pace with global population growth. This target is even more challenging considering the effect of climate change on water availability. In this case, developing crops with better ability to acquire water would provide a solution.
1.The findings of the research may have a positive effect on several global issues EXCEPT
A.ensuring food safety B.preserving the agriculture
C.solving the absence of water D.increasing crop production
2.With the help of the findings, plants may be able to ________.
A.take in more nutrients B.change inactivated roots
C.grow in challenging conditions D.branch out without a special gene.
3.Which of the following best explains “imperative" in the last paragraph?
A.effective. B.hopeful.
C.impractical. D.urgent.
4.What is the new mechanism mentioned by Professor Bennett?
A.How a branching master gene responds to a particular nutrient.
B.How plant roots change their shape according to the soil moisture.
C.Why plants have different abilities to adapt to soil moisture conditions.
D.How the certain protein in activates root branching when accessible to water.
高一英语阅读理解困难题查看答案及解析