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题型:阅读理解-阅读单选 难度:0.65 引用次数:70 题号:19814623

Human activities have caused severe narrowness in over half of the world’s largest lakes in the past 30 years, causing risks to health, economies, and the environment, according to a study in the journal Science. The global decline in water storage equals to 17 times the capacity of Lake Mead, the largest lake in the U.S. Overuse of water for agriculture, development, and human-caused climate change are the main factors driving the decline, particularly in natural lakes. The accumulation of dirt and sand behind dams also contributes to the fall of water levels in lakes.

The findings showed “significant declines,” stated Fangfang Yao, the lead author of the study. “Roughly one-quarter of the world’s population lives in a basin with a drying lake,” Yao said. “So the potential impact could be significant.”

At least half of the decline in natural lakes was driven by human-caused climate change and overconsumption, which should remind water managers to improve protection and water efficiency, according to Yao. “If you know a lake is falling and that loss resulted from human activities, can we attach more importance to protection and improving water efficiency?” she said.

A climate change-driven drought and an ever-growing human thirst have continued to consume the two largest lakes in the U.S. Lake Powell and Lake Mead, which the Colorado River feeds. Lake Chad, one of Africa’s largest freshwater lakes which supplies nearly 40 million people with water, has shrunk (收缩) by an estimated 90% since the 1960s.

The United Nations regards access to safe drinking water as a universal human right, yet around 2 billion people lack access to it, and half of the global population experiences severe water shortage annually.

“Uncertainties are increasing,” said Richard Connor, the editor-in-chief of a U.N. water report published earlier this year at a press conference in late March, where world leaders met to try and find better strategies for managing the planet’s rare freshwater. “If we don’t address it, there will definitely be a global disaster.”

1. What can we learn about lakes from paragraph 1?
A.They are being developed.B.They are becoming smaller.
C.They are causing climate change.D.They are damaged by human activities.
2. Which of the following is the main cause of water shortage?
A.Severe environmental problems.B.Ever-increasing world’s population.
C.Climate change and overuse of water.D.Drought and an ever-growing human thirst.
3. What does the underlined word “universal” in paragraph 5 mean?
A.Unique.B.Normal.C.Particular.D.Common.
4. What is the author’s purpose in writing the text?
A.To warn people to save water.B.To call on people to protect the environment.
C.To tell people water shortage in the world.D.To find better ways of managing freshwater.

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【推荐1】The good news is that more people bought electric vehicles (EVs) in 2020. The bad news is that sport utility (多用途的)vehicles (SUVs) continued to grow in popularity, too. “The fall in oil consumption due to the first trend was completely canceled out by the second," said Laura Cozzi, an officer at the International Energy Agency (JEA),

Between 2010 and 2020, global carbon dioxide emissions (排放)from conventional cars fell by nearly 35 billion Lons, due to reasons such as fuel efficiency improvements as well as the switch to electric cars. Emissions from SUVs rose by more than 50 billion tons. "While the growth in EVs is encouraging, the boom in SUVs is heart-breaking," says Peters at the Cicero Climate Research Centre in Norway.

There are many reasons for the growing popularity of SUVs. For example, rising economic boom in many countries means more people are able to afford them. Some people see them as status symbols. Also, SUVs are heavily advertised by car-makers, whose profit is higher on these vehicles. Some countries, including France, have introduced plans under which more taxes are paid on heavier cars. But Peters thinks that people who are rich enough to afford SUVs won't be deterred by slightly higher taxes. "There are now some electric SUVs available, but 1 hope one day you will see more electric vehicles brought to the SUV market," says Peters.

Even if it happens, switching to electric SUVs isn't a good solution. Due to their size and bigger batteries, it takes more resources to build electric SUVs, and they consume around 15 percent more electricity. That means higher emissions unless the electricity comes entirely from renewable sources, and higher electricity demand makes it harder to green the electricity supply.

1. What can we infer from Paragraph 2?
A.Scientists should devote themselves to improving fuel efficiency.
B.The emission of carbon dioxide of motor vehicles has hit a new low.
C.Electric vehicles will certainly take the place of sport utility vehicles.
D.The popularity of SUVs destroys some efforts at environmental protection.
2. What does the underlined word "deterred” probably mean?
A.Blocked.B.Encouraged.C.Removed.D.Involved.
3. What is one of the reasons that SUVs are popular with consumers?
A.SUVs are discounted heavily.
B.SUVs are often advertised by car producers.
C.SUVs are taxed at a lower rate in some countries.
D.SUVs consume fewer resources than other vehicles.
4. What point does the author try to make in the last paragraph?
A.The electric SUVs should be made smaller and lighter.
B.The electric SUVs are a good guarantee for less pollution.
C.More electric SUVs don’t necessarily mean "environment-friendly".
D.Future electric SUVs will be powered with completely green energy.
2021-07-07更新 | 106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】Which is better for Earth: an electric or gas-powered vehicle? The answer to this question might seem blindingly obvious: Of course electric cars must be better for the environment, because they don’t give off greenhouse gases as people drive. However, electric vehicles (EVs) aren’t perfect, and they come with their own set of polluting problems. Their batteries require a large amount of energy to produce.

Battery production is just one part of an electric car’s life span. A study looked at the entire life cycle of an EV’s emissions (排放), from mining the metals for the batteries to producing the electricity needed to power them, and then compared this with the average emissions of a gas-powered vehicle. The team found that when EVs are charged with coal-powered electricity, they’re actually worse for the environment than gas-powered cars.

“Only when connected to the dirtiest, coal-heavy electric grids (电网) do gas-powered cars become comparable to EVs on a greenhouse gas basis,” said Colin Sheppard, an expert in energy and transportation systems. That’s why more and more countries are decreasing the power supply from coal. In China, the national grid is improving with more investments in renewable energy. For example, it has twice as much wind energy capacity as the U.S. and it builds more solar panels per year than any other countries.

Sheppard modelled a future in which all cars were electric. “We wanted to understand what it might be like if all passenger vehicles are electrified.” For example, Sheppard calculated that if all vehicles in the U.S. were electric, it would reduce greenhouse-gas emissions by 46% every year. This reduction could be increased even further if those vehicles were using a technique known as “smart charging” in which cars are recharged at chosen times (often at night) to reduce the cost of electricity.

In short, it’s far easier to argue in favor of buying an EV than a gas-powered vehicle. But what about the cost? Aren’t electric vehicles too expensive for most people?

1. In which case do EVs get more heavy-polluted than gas-powered cars?
A.Being powered only by batteries.B.Consuming coal-powered electricity.
C.Starting to give off greenhouse gases.D.Replacing gas-powered vehicles entirely.
2. What is greatly promoted in China now according to the text?
A.Renewable energy.B.Electric vehicles.C.Coal-powered supply.D.Public transport.
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A.With a discussion.B.With an examination.C.With a calculation.D.With a questionaire.
4. What might the paragraph following the passage be about?
A.Inventing green gas-powered vehicles.B.Developing environment-friendly grids.
C.Making electric vehicles more affordable.D.Getting rid of fossil energy like coal and oil.
2022-05-15更新 | 160次组卷
阅读理解-阅读单选(约360词) | 适中 (0.65)
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【推荐3】Minh Anh Ho is sitting beside a microscope. Many people are busy with other tasks. One is interviewing the mayor for a TV news station. Another is running the electric company. As a researcher for a company that repurposes plastic, Minh Anh Ho is studying a sheet of cling wrap (保鲜膜). “It’s a really important job,” she says. “Plastic takes a really long time to disappear, so it would be good to come up with something else to do with it and not just throw it away.”

The learning center where Minh Anh Ho and her class are spending their day is designed to introduce kids to working life. Students run an imaginary town, with each kid doing a different job in a different business. Each year, about 83% of all sixth graders in Finland go through the program. It teaches them not just about business and working, but also, as Minh Anh Ho’s “job” makes clear, about the circular (循环) economy.

Most societies have linear (线性) economies, which operate on a “take, make, waste” model. Natural resources are taken from the Earth and made into products, which are usually thrown away if left over. In 2016, Finland became the first country to use a “road map” to a circular economy. This model focuses on the transformation of existing products. Businesses rely on recycled or repurposed materials and use less raw (未经加工的) material to make their products. That reduces the amount of waste going into landfills.

Education has always been a central part of Finland’s plan. Kindergarten director Liisa Woitsch is sitting on the floor with students and a broken wooden chair. “Do we just throw it away now,” she asks, “or can you think of anything else that can be done with it?” A little boy pounds on the chair. He says it can be used as a drum.

Anssi Almgren helped design the program. “Children have so many great ideas,” he says. “We want to enable them to think about solutions. But changing a society by educating its youth takes time.”

1. The author describes the learning center in paragraph 1 to ________.
A.make readers better understand the program
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D.praise the students’ concentration
2. How does the author mainly develop paragraph 3?
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3. What is the main purpose of a circular economy?
A.To reduce the waste of resources.B.To keep a higher living standard.
C.To increase the use of raw material.D.To discover new types of natural resources.
4. What is the text mainly about?
A.The lessons from a learning center.B.An introduction to linear economies.
C.The education on the circular economy.D.Finland’s plans on economic development.
2022-10-27更新 | 139次组卷
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