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题型:阅读理解-阅读单选 难度:0.65 引用次数:189 题号:14999623

Winter can usually kill most wildfires. But in the far North,some forest fires just don’t die. They are thought of as “zombie (僵尸) fires”.

“Zombie fires” usually sleep underground in winter. Covered by snow, they smoke through the cold. Fueled by carbon-rich peat (泥炭) and soil in the North, most of these hidden fires spread slowly for less than 500 meters during the winter. When spring comes, the flames (火焰) of the fires appear near sites that they burned in winter, and they turn to burning fresh fuels around. This may happen well before the traditional fire season in the far North.

“Zombie fires” had been known mostly from firefighters’ stories. Few scientists studied them until details in some satellite images attracted one research team. Rebecca Scholten, a member of the team, studies earth systems at Vrije University Amsterdam in the Netherlands. Her team noticed an unusual thing. “New fires have been starting very close to the former years’ fires in recent years,and we wonder how often the fires might survive the winter,” Scholten explains.

These “zombie fires” are rarely seen before, according to a new study from Nature. But in recent years, they are becoming more common, the study warns. It is believed that the “zombie fires” are even on the road of being a threat. Forests in the far North are warming faster than the globe’s average (平均数). Scholten says, “We’re seeing more hot summers and more large fires and strong burning. That could set the stage for the fires to become a bigger problem,” she worries. And the region’s soils hold a lot of carbon—maybe twice as much as earth’s atmosphere. More fires here could give off huge amounts of greenhouse gases. That would drive a cycle of more warming and even higher risk of fires.

1. What do we know about the “zombies fires” in the far North?
A.They will completely die out in winter.
B.Carbon-rich peat helps them burn slowly in winter.
C.They often happen after the traditional fire season.
D.Their flames can only appear in spring.
2. What can we infer from Scholten’s words in paragraph 3?
A.“Zombie fires” appear earlier than the years before.
B.“Zombie fires” happen far from former years’ fires.
C.“Zombie fires” happen more frequently than before.
D.“Zombie fires” appear in different shapes every year.
3. What was a cause of being a threat for the “zombie fires”?
A.The global warming is slowing down.
B.The hot summers are less and less seen.
C.The area’s soils are short of carbon.
D.More greenhouse gases are given off.
4. What can be the best title for the text?
A.Where Are “Zombie Fires” From?
B.Are “Zombie Fires” Frightening?
C.Pay Attention To “Zombie Fires”!
D.“Zombie Fires” Are Caused By Humans!

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【推荐1】Typhoons can be deadly — in 2013, Typhoon Haiyan, the strongest ever recorded, was responsible for 6,340 deaths—and cost billions in damages. Current forecast models can only predict these storms 10 days in advance, at most, and they cannot precisely predict how intense the storms will become.

An international team of researchers has developed a model that analyzes nearly a quarter of Earth’s surface and atmosphere in order to better predict the conditions that birth typoons.

“The target problem of this study is how to foretell the birth of typhoons,” said paper author Mingkui Li, associate professor in the Key Laboratory of Physical Oceanography in the Ocean University of China and the Pilot National Laboratory for Marine Science and Technology (QNLM). “We specifically address three aspects: the beginning time, inner pressure and maximum wind speed.”

The researchers also accounted for the influence of one variable(变量) on another, such as wind speed on sea surface temperature. This influence is well understood and accounted for in climate predictions and in weather forecasts, but it has not been fully applied in understanding how long-term climate affects day-to-day weather, according to Li. “We aimed to provide insights on the time scale that can be used to forecast typhoons in advance.”

From their study, the researchers determined that a model with the ability to better understand the relationship between warm sea surface temperatures and weak wind movement— conditions that favor typhoon formation—could improve typhoon predictability.

“Our goal is to develop a 10 to 30-day prediction system that will lead to seamless(无缝的) weather-climate predictions.” Shaoqing Zhang, paper author and professor in the Key Laboratory of Physical Oceanography, said.

1. What is the problem with the present forecast system?
A.It cannot foretell storms in advance.
B.It is ineffective in accuracy and timeliness.
C.It costs too much and causes great damages.
D.It can hardly predict the intensity of typhoons.
2. What does the underlined word “it” in paragraph 4 refer to?
A.The variable.B.The climateC.The temperature.D.The influence.
3. What is the purpose of the study?
A.To advance the prediction system.
B.To figure out the three main aspects.
C.To know how climate affects daily weather.
D.To understand the influence of the variables.
4. Where is this text most likely from?
A.A work diary.B.A travel guidebook.
C.A science magazine.D.A fantasy fiction.
2021-06-08更新 | 153次组卷
阅读理解-阅读单选(约320词) | 适中 (0.65)
文章大意:本文是一篇说明文。文章主要介绍了龙卷风的一些相关知识以及Time Samaras如何追踪龙卷风的。

【推荐2】In the US, tornadoes (龙卷风) are responsible for 80 deaths and more than 1,500 injuries each year. Although they happen quite frequently, tornadoes are difficult to predict. Why? Tornadoes develop from storms, but only some storms are likely to become tornadoes. Scientists don’t know where and when a storm will touch the ground and turn into a tornado. Today, the warning time for a tornado is usually just 13 minutes.

Time Samaras is a storm chaser. His job is to find tornadoes and follow them. When he gets close to a tornado, he puts a special tool called a turtle probe on the ground. This tool measures things like a tornado’s temperature, humidity (湿度), and wind speed. With this information, Samaras can learn what causes tornadoes to develop. If meteorologists (气象学家) understand this, they can warn people about tornadoes sooner and save lives.

How does Samaras hunt tornadoes? It’s not easy. First, he has to find one. Tornadoes are too small to see using weather satellites. So Samaras can’t rely on these tools to find a tornado. Instead, he waits for tornadoes to develop. Every May and June, Samaras drives about 40,000 kilometers across an area known as Tornado Alley, looking and hoping to spot a tornado.

Once Samaras sees a tornado, the chase begins. But a tornado is hard to follow. Some tornadoes change direction several times — for example, moving east and then west and then east again. When Samaras finally gets near a tornado, he puts the turtle probe on the ground. Being this close to a tornado is terrifying. Debris (碎片) is flying in the air. Then wind is blowing at high speed. He must get away quickly.

The work is risky, even for a skilled chaser like Samaras. But danger won’t stop his hunt for the perfect storm.

1. What do we know about tornadoes?
A.They can be predicted by satellites.B.They usually come down in winter.
C.The warning time for them is very short.D.They often develop into storms.
2. A turtle probe is used to ________.
A.predict tornadoesB.collect information about tornadoes
C.chase tornadoesD.decrease the power of tornadoes
3. The third paragraph is mainly about ________.
A.how tornadoes developB.how the turtle probe works
C.how powerful Tornado Alley isD.how Samaras chases a tornado
4. According to the text, the job of a tornado chaser is ________.
A.difficult and dangerousB.stressful and troublesome
C.mysterious and interestingD.exciting and popular
2023-12-09更新 | 64次组卷
阅读理解-阅读单选(约340词) | 适中 (0.65)
名校
文章大意:本文是一篇说明文,主要讲的是如何在地震中保护自己和家人。

【推荐3】Earthquakes are common natural disasters. No matter where you are, knowing how to protect yourself and your family during an earthquake is necessary.

Some experts believe that when you feel the ground is shaking, drop down, take cover under a desk and hold on. Most earthquake injuries are the result of being hit by something falling on you. You should stay indoors until the shaking stops. If you are outdoors, don’t stay near buildings, trees or power lines. Many people think that in case of an earthquake, they should “get under something” like a doorway or desk, in order to avoid being hurt by falling objects. Rescue experts now say this is the wrong thing to do. For example, in the 1985 Mexico City earthquake, they found hundreds of children in schools, crushed by their desks. However, they could have survived by lying in the aisle (通道,走道) next to their desks.

So find a nice piece of furniture, a chair, a sofa, and lie down, or curl up next to it. A falling roof may compact (压实) the furniture, but will still leave a space for you to survive next to it. This also holds true if you are in a hotel room, especially at night. Get off the bed, and lie down next to it.

In San Francisco’s 1989 earthquake, the upper freeway fell on the lower one. People who drove along were crushed in their cars. But they had time to get out and lie down next to their cars. Yes, their cars were crushed, but there was space from top to bottom next to the vehicles for people to survive and wait a rescue.

Doorways and stairways are very unsafe. Stay away from those.

What can we do to keep ourselves safe? Staying calm is the first and most important rule when facing accidents.

1. Which word can replace the underlined word “crushed” in Paragraph 2?
A.hiddenB.protectedC.caughtD.killed
2. How can we probably get a narrow escape from an earthquake?
A.Lie down under a table or desk.
B.Shout out loudly and ask for help.
C.Run out of the house and stay under a big tree.
D.Lie down next to a strong piece of furniture or a car.
3. What should you do first when accidents happen according to this passage?
A.Keep calm.B.Drop down.
C.Get under buildings.D.Stay near trees.
4. What is the best title of the text?
A.Right Earthquake Survival TipsB.The New Idea of the Rescue Experts
C.Great Damages Caused by EarthquakeD.A Common Natural Disaster-earthquake
2023-08-09更新 | 89次组卷
共计 平均难度:一般