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(2025·广东东莞二模)When people think of wildfires, burning trees often come up. If you see a city burning while its trees remain standing, you might wonder if something unusual is happening.
For weeks in January, 2025, large wildfires swept through Los Angeles, the USA. They took many lives and burned a large number of houses. As pictures of the fires spread across the internet, people noticed trees standing next to burned-out homes and cars. Some didn't believe that a fire would leave trees untouched. As plenty of pictures and videos from Los Angeles show, trees can and do catch fire. But it's true that some did not burn. Researchers say there is an explanation for that.
First, it comes down to moisture(水分). "It's pretty clear to me," said Miranda Hart, a biology professor. "Trees are filled with tons of water." Without doubt, trees do burn when fires are big and hot enough. But if a tree full of water is next to something very dry, the dry thing will burn first and even change the course of the fire. "In that way, you can imagine the fire just going around the tree if there're enough dry things on either side of it," Prof. Hart added.
Besides, the tree type also matters. Certain trees are more likely to catch fire. Deciduous(每年落叶的) trees, for example, are less likely to burn. That's because their leaves are wet and they have less resin(树脂). Compared with them, the conifers are usually evergreen trees. They are very easy to burn.
In Los Angeles, palms(棕榈树) are everywhere. They've become a symbol of the city. But some local fire departments have advised against planting more palms. Without proper care, these trees can burn terribly during wildfires and bring danger to people and objects nearby.
( )1. What do we know about the wildfires in Los Angeles according to the text?
A. All trees caught fires. B. They lasted for one week.
C. They burned many houses. D. They broke out in summer.
( )2. How would a fire pass through a tree full of water and dry things according to Prof. Hart?
A. B. C. D.
( )3. What does the underlined word "they" refer to in Paragraph 4?
A. Leaves. B. Palms. C. Deciduous trees. D. Wildfire.
( )4. In Los Angeles, why local fire departments advised against planting more palms?
A. Because palms can't catch fire.
B. Because palms have more resin.
C. Because palms are filled with tons of water.
D. Because palms are easy to burn during wildfires without proper care.
( )5. What is the best title for the passage?
A. Why the wildfires swept through Los Angeles?
B. How to suggest Los Angeles stop planting palm trees?
C. What people can do to help control the fires in Los Angeles?
D. Why some trees can stay safe from wildfires?
(2025·广东东莞二模)When people think of wildfires, burning trees often come up. If you see a city burning while its trees remain standing, you might wonder if something unusual is happening.
For weeks in January, 2025, large wildfires swept through Los Angeles, the USA. They took many lives and burned a large number of houses. As pictures of the fires spread across the internet, people noticed trees standing next to burned-out homes and cars. Some didn't believe that a fire would leave trees untouched. As plenty of pictures and videos from Los Angeles show, trees can and do catch fire. But it's true that some did not burn. Researchers say there is an explanation for that.
First, it comes down to moisture(水分). "It's pretty clear to me," said Miranda Hart, a biology professor. "Trees are filled with tons of water." Without doubt, trees do burn when fires are big and hot enough. But if a tree full of water is next to something very dry, the dry thing will burn first and even change the course of the fire. "In that way, you can imagine the fire just going around the tree if there're enough dry things on either side of it," Prof. Hart added.
Besides, the tree type also matters. Certain trees are more likely to catch fire. Deciduous(每年落叶的) trees, for example, are less likely to burn. That's because their leaves are wet and they have less resin(树脂). Compared with them, the conifers are usually evergreen trees. They are very easy to burn.
In Los Angeles, palms(棕榈树) are everywhere. They've become a symbol of the city. But some local fire departments have advised against planting more palms. Without proper care, these trees can burn terribly during wildfires and bring danger to people and objects nearby.
( )1. What do we know about the wildfires in Los Angeles according to the text?
A. All trees caught fires. B. They lasted for one week.
C. They burned many houses. D. They broke out in summer.
( )2. How would a fire pass through a tree full of water and dry things according to Prof. Hart?
A. B. C. D.
( )3. What does the underlined word "they" refer to in Paragraph 4?
A. Leaves. B. Palms. C. Deciduous trees. D. Wildfire.
( )4. In Los Angeles, why local fire departments advised against planting more palms?
A. Because palms can't catch fire.
B. Because palms have more resin.
C. Because palms are filled with tons of water.
D. Because palms are easy to burn during wildfires without proper care.
( )5. What is the best title for the passage?
A. Why the wildfires swept through Los Angeles?
B. How to suggest Los Angeles stop planting palm trees?
C. What people can do to help control the fires in Los Angeles?
D. Why some trees can stay safe from wildfires?
答案：
1.C 2.A 3.C 4.D 5.D
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