British researchers say they have created an artificial intelligence （AI） model that is highly effective at predicting rainfall within the next 90 minutes.
The model was built by scientists at Google-owned research company DeepMind in London.The company partnered with researchers at the University of Exeter in Britain and the Met Office，the British government's national weather service.The team says tests of the system showed it produced more accurate predictions，or forecasts，for short-term rainfall than other existing systems.
Accurate nowcasting can be a very important tool for preparing for possible weather emergencies.It can be used by officials in the areas of water management，agriculture，air and ground traffic control and outdoor event planning. "We were especially interested in the ability of these models to make predictions on medium to heavy-rain events，which are the events that most impact people and the economy，" the team said.The scientists said their model aims to create predictive "movies" of immediate weather patterns.They said that，unlike other systems，theirs can accurately capture large-scale events，as well as several different rain possibilities.This combination permits "rainfall uncertainties" to be deeply explored.
During the testing process，the team said the model showed "statistically significant" improvements in these areas compared to competing methods.In addition，the researchers reported that a group of more than 50 weather experts from the Met Office rated the AI model to be more accurate and useful in 89 percent of cases than existing forecasting systems.
Despite the study results，researchers admitted that the model still has limitations.They said "more work is needed to improve the accuracy of long-term predictions and the accuracy on rare and intense events." The team said it will now center on developing new methods to test and measure the model's performance.It will also work to create more specialized systems to work in real-world conditions.
（1）What do we know about the new AI model？ CC
A．The model is created by researchers of Met Office.
B．The model can predict any rainfall within 90 minutes.
C．The model needs improving in long-term forecasting.
D．The model has been used in real-world conditions.
（2）What is Paragraph 3 mainly about？ CC
A．The difficulty of accurate nowcasting.
B．The relationship between weather forecasting and economy.
C．The necessity of building the new AI model.
D．The principles of the new model.
（3）Why does the writer mention the weather experts from the Met Office in paragraph 4？ AA
A．To prove the advantage of the new model.
B．To compare the new model with the old systems.
C．To explain the rule of weather forecasting.
D．To show how the existing system works.
（4）Which of the following can be the best title for the passage？ BB
A．Existing Forecasting system Needs Improving.
B．AI Predicts Immediate Rainfall Better than Existing Systems.
C．New Explorations in Weather Predictions.
D．New Methods on Testing the AI Model's Performance.
【答案】C；C；A；B
【解答】
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發(fā)布：2024/4/20 14:35:0組卷：7引用：6難度：0.6
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These forests are at the tops of mountains，generally near the equator （赤道）.These wet，wooded mountaintops are mainly in African and Central and South American countries.They are called "cloud forests" because their height allows for the formation of clouds among the trees.The trees in these forests pull water out of the clouds.The water gathers on the leaves and falls into small rivers below，which flow into towns at the bottom of the mountain.The yearly rainfall in these areas is about 180 centimetres.Cloud forests can pull in up to 60 percent of that.The water is important to the plants and the people in the area.It helps them survive.
Cloud forests are also home to countless species of plants that can't be found anywhere else.One small cloud forest has as many types of plants as there are in all of Europe.In fact，there are so many that scientists haven't made a complete list of them yet.
These forests are being destroyed at increasing speed.Trees are being cut down，and roads are being built in their place.Some people have a goal to get government money to protect the forests.But they have had little success so far.Another way is to take the place of the destroyed plants with new ones.That，too，has been difficult because the plants are so special.There's plenty of work to be done，but saving the cloud forests is still possible with creative solutions.
（1）Where can you probably find cloud forests？
A．In North America.
B．Far from the equator.
C．In an African country.
D．At the foot of mountains.
（2）How much rainfall is pulled in by the cloud forests in those areas every year？
A．About 60 cm.
B．About 108 cm.
C．About 180 cm.
D．About 300 cm.
（3）What is the main idea of paragraph 3？
A．Europe is short of plant types.
B．Scientists are working on a list.
C．Cloud forests are getting smaller.
D．Cloud forests house many plants.
（4）What will be discussed in the following part of the text？
A．Ways to protect cloud forests.
B．Goals of cloud forest protectors.
C．Difficulties in planting new trees.
D．Successes of getting wide support.
（5）Where can we probably find the text？
A．In a storybook.
B．In a travel guide.
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D．In a geography magazine.發(fā)布：2025/1/1 18:0:1組卷：7引用：3難度：0.5 -
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（1）The experiment described in Paragraph 1 is related to the baby's．
A．sense of hearing
B．sense of sight
C．sense of touch
D．sense of smell
（2）Babies are sensitive to the change in．
A．the size of cards
B．the colour of pictures
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A．To reduce the difficulty of the experiment．
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D．To keep the babies' interest．
（4）Where does this text probably come from？
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B．Children's literature．
C．An advertisement．
D．A science report．發(fā)布：2025/1/1 17:0:1組卷：3引用：3難度：0.5 -
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（4）In the last paragraph，Jim states that.
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