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题型:阅读理解-阅读单选 难度:0.65 引用次数:153 题号:20984596

A smoke bomb from a party started a major blaze (火焰) near Los Angeles in September,just one of many recent wildfires ignited (引燃) by people. Now, an analysis of satellite data shows human-caused blazes spread much faster and kill more trees than ones ignited by lightning.

Fire has always been a part of California’s natural history. But several centuries of human settlement have created new conditions that promote its spread.Studies have shown human ignition is to blame for 84% of all wildfires in the United States,and 97% of all those that threaten homes.

Human-caused fires always seemed more extreme, says Stijn Hantson,a fire ecologist at the University of California,Irvine,who led the new research. But measurements of how fast they spread and their impacts on ecosystems (生态系统) in California had not been explored, he notes.

To examine those differences, Hantson and his colleagues analyzed satellite data for 214 wildfires in California between 2012 and 2018.Human-caused fires typically spread about 1.83 kilometers per day, more than twice as fast as lightning-ignited burns,the team reports.The faster spreading fires also burned more violently and killed “double or triple” the trees as lightning-caused ones.

However, there is no fundamental difference in the chemistry of a human-caused blaze. “A fire is a fire” Hantson says. “It’s the surrounding things that matter.” Causes of fires ranging from improperly thrown cigarettes to sparking (冒火花) power lines could ignite a blaze on any given day, he says, while lightning strikes and dry thunderstorms only happen seasonally.

The researchers tracked meteorological data and found that human-caused fires were more likely to start on days with extreme weather conditions,and were more associated with drier,less-forested landscapes. This adds to scientists’ understanding of how humans are extending the fire season, says Nathan Mietkiewicz, an ecologist with the National Ecological Observation Network.

1. The author uses some data in paragraph 2 to show that ________.
A.wildfires are mostly caused by humans
B.most wildfires threaten people’s homes
C.wildfire is a part of California’s natural history
D.wildfires break out frequently in the United States
2. What’s the purpose of Hantson’s research?
A.To prove how extreme human-caused fires are.
B.To find out the causes and solutions of wildfires.
C.To explore the speed and effects of wildfires caused by humans.
D.To examine the differences between a human-caused blaze and a nature-caused one.
3. How is the result presented in paragraph 4?
A.By giving examples.
B.By making comparisons.
C.By analyzing cause and effect.
D.By giving definitions.
4. What can be inferred from the last two paragraphs?
A.Human-caused fires and lightning-caused fires are basically different.
B.Lightning strikes and thunderstorms can always lead to wildfires.
C.Wildfires only happen in dry,less-forested areas.
D.Humans are to blame for the extended fire season.

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阅读理解-阅读单选(约410词) | 适中 (0.65)
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文章大意:本文是一篇说明文。文章解释了什么是“僵尸火”、“僵尸火”发生的原因及其危害等。

【推荐1】The cold, wet weather of winter often puts out any wildfires that are still burning, but not in the far North areas, such as Alaska, Canada, and other parts of North America. Some forest fires just don’t die in these places. Think of the fires as “zombies” (僵尸): Scientists do. When summers are warmer than normal, some fires can hide through the winter. They burn dead plant matter and soils under snow. In May 2021, scientists reported their work to a scientific journal. The scientists saw that zombie fires are rare but they could become more common as the world warms, the study warns.

“Some years, new fires were starting very close to the previous year’s fire,” explains Rebecca Scholten. She studies Earth and environmental sciences at Vrije University Amsterdam in the Netherlands. The new fires made scientists wonder how often fires might survive the winter. The scientists started by combing through firefighter reports. Then they compared these with satellite images of Alaska and northern Canada. The scientists looked for fires that began close to fires from the year before. They also focused on blazes starting before the middle of summer. Random lightning or human actions spark most fires in the area, Scholten says. But those fires happen later in the year.

Zombie fires accounted for less than 1 percent of the total area burned by fires from 2002 to 2018. But it changed from year to year. Take 2008, for example. A zombie fire burned Alaska that year. It caused almost one-third of fire damage that year. One clear pattern emerged: Zombie fires were more likely to happen after very warm summers. High temperatures may allow fires to reach more deeply into the soil. Such deep burns are more likely to survive to spring.

The zombie fire threat could grow. The climate is warming. Forests in the far North already are warming faster. “We’re seeing more hot summers and more large fires and intense burning,” Scholten says. Plus, zombie fires could cause more issues. The fires release huge amounts of greenhouse gases. These trap heat in the Earth’s atmosphere. The atmosphere is a layer of gases that surround the Earth. Scholten’s research could help fire management. Firefighters would know to check for them after warm summers.

1. What may lead to zombie fires according to the passage?
A.wet weatherB.hotter summers
C.low temperaturesD.cold winters
2. What can we learn about zombie fires from Paragraph 2?
A.Where flames broke out provided the clue.
B.Changing climate plays a role in the zombie fire threat.
C.Zombie fires are less likely to happen after very warm summers.
D.It is of little use comparing firefighter reports with satellite images.
3. What conclusion will be possibly made based on the last paragraph?
A.It is important to understand zombie fires.
B.Zombie fires are likely to be under control soon.
C.Firefighters cannot do much to stop the zombie fires.
D.We still have much to learn about the warming climate.
4. Which of the following could be the suitable title of the passage?
A.“Zombie“ wildfires do great damage to land
B.“Zombie” wildfires release greenhouse gases
C.“Zombie“ wildfires sparked by human actions
D.“Zombie” wildfires reappear after wintering underground
2023-07-21更新 | 134次组卷
阅读理解-阅读单选(约370词) | 适中 (0.65)

【推荐2】The Centers for Disease Control and Prevention reported recently that diseases from mosquito, flea and tick bites tripled in the US between 2004 and 2016, with more than 640,000 cases seen during that period of time. Maine alone saw a 20-fold increase in cases of the tick-borne (蜱传播的) illness Lyme disease. The danger showed no sign of abating this year, with ticks crawling into Mainers’ lives as early as May.

Their early arrival was largely a product of warmer temperatures in the region. It is perhaps for this reason that Lyme disease-once a regional problem largely confined to New England-has now been discovered in all 50 states. Warm weather-loving ticks and Lyme disease are just the examples of how our rapidly-heating planet is destroying our health.

Climate change’s most visible symptoms are the natural disasters we’ve seen so often in recent years. When a disaster strikes, the most immediate threat to health is, of course, the danger posed by the event itself. During the 2017 wildfires in California and Oregon, for example, many living near the smoke reported respiratory distress (呼吸窘迫) and other problems because of breathing in the dangerous smoke. But this initial damage is often just a prologue (序幕) to the damage these disasters can have on our health-damage that unfolds over the course of weeks, months or even years.

Take standing flood water for example. It’s a ripe breeding ground for mosquitoes and bacteria and can pose a serious threat in the period following a major storm. Climate change’s impact is combined with the destruction of the basic construction-like power grids and drinking water delivery systems-and the loss of core services-like health care and waste disposal. It can both create new health challenges and complicate the treatment of existing ones.

Climate change can lead to storms and fires, fever and smoke, and the mental and physical health challenges that characterize the long aftermath of disasters. It is through these damages that climate change has gotten under our skin, into our lungs and weighed on our minds to the hurt of our well-being.

1. What does the underlined word “abating” in the first paragraph mean?
A.Decreasing.B.Distinguishing.C.Disobeying.D.Developing.
2. Why can Lyme disease be found in all 50 states now?
A.Because of the movement of population.
B.Because of the wide spread of mosquitoes.
C.Because of more natural disasters in the country.
D.Because of warmer temperatures all over the country.
3. What does the author mainly want to show in the text?
A.Natural disasters are becoming more common.
B.We should take measures to prevent climate change.
C.Climate change is becoming more and more noticeable.
D.Climate change increases the chance of people getting sick.
4. The author draws the main idea of the text by ________.
A.following time orderB.giving examples
C.making comparisonsD.presenting research findings
2022-01-01更新 | 45次组卷
阅读理解-阅读单选(约330词) | 适中 (0.65)
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文章大意:本文是新闻报道。文章报道了意大利北部地区今冬降雨量减少,多地出台限水措施。

【推荐3】People living in some northern Italian towns face fines for wasting water as mayors ration(定量供应) supplies amid a severe drought.

Italy has had one of its driest winters in the last 65 years, with rainfall 80% lower than the seasonal average. The situation has been more acute in northern regions, where some areas have been deprived(剥夺) of significant rainfall for three months or more. The Po, the county’s longest river, is at its lowest level recorded in winter since 1972.

Mayors of towns in regions including Piedmont, Liguria, Lombardy and Trentino have introduced water-rationing measures, ranging from fountains being switched off and nightly restrictions on tap water to bans on using water for gardens and allotments(小块菜地), for washing cars and filling swimming pools.

“I don’t ever recall a situation of this kind in winter. We haven’t had any rain since 8 December,” said Francesco Pietrasanta, the mayor of Quarona, a town in Piedmont. “The rule is to only use water for real necessity, such as for hygiene(卫生) or food reasons.”

The winter drought followed an intense, protected heatwave across Italy last summer. In August, Siracusa in Sicily is believed to have broken the European record for the highest temperature when it recorded a figure of 48.8℃. Snowfall has also been below average this winter. Scientists have long predicted that the climate crisis and global heating would lead to more frequent extreme weather.

Rain is forecast in the north and the rest of Italy from Wednesday, although Pietrasanta said it would need to be significant to resolve the water shortage. “We might get some rain on Friday but I’m not sure it will be enough,” he said. “This situation ought to make us think about changing policy to manage water in a different way, especially with climate change.”

1. Why are the statistics listed in paragraph 2?
A.To stress the severity of drought.
B.To show climate differences in regions.
C.To present the consequence of low temperature.
D.To discuss the possibility of rainfall
2. Which of the following actions will be fined?
A.Turning off foundations.B.Swimming in public pools.
C.Watering gardens in the morning.D.Using modest tap water at night.
3. What may lead to the winter drought according to paragraph 5?
A.The ongoing climate change.B.The heatwave last summer.
C.The absence of snowfall.D.The overconsumption of water.
4. What can we infer from Pietrasanta’s words in the last paragraph?
A.Similar situations have appeared before in northern Italy
B.Measures should be adopted to tackle water shortage
C.The coming rain will be sufficient to solve problems
D.Proper policies have been put in place since the crisis
2023-01-17更新 | 163次组卷
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