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Would it surprise you to learn that, like animals, trees can communicate with each other and pass on their wealth to the next generation---their young trees?
Suzanne Simard, forest ecologist(生态学家) at the University of British Columbia, explains how trees are much more complex(复杂的) than most of us ever imagined. Although Charles Darwin(达尔文) thought that trees are competing for survival of the fittest, Simard and her team have made a new discovery and showed just how wrong he was. In fact, the opposite is true: trees survive through their group work and support, passing around necessary nutrition(营养) such as nitrogen(氮) and carbon “depending on who needs it”.
Nitrogen(氮) and carbon are shared through miles of underground fungi (真菌) networks.This makes sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it influences all.
Simard talks about “Mother trees”. These are usually the largest, oldest plants that on which all other trees depend. These “Mother trees” are connected to all the other trees in the forest by this network of fungi, and may manage the resources of the whole trees and plants in the forest. She explains how these trees pass on the wealth to the next generation, transporting important resources to young trees so they may continue to grow. When humans cut down “Mother trees” without paying attention to these highly complex “tree societies” of the networks on which they feed, we are reducing the chances to save the whole forest.
“We didn’t take any notice of it,” Simard says sadly. “Mother trees” move nutrition into the young trees before dying, but we never give them chance. If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.
1.The underlined sentence “the opposite is true” in Paragraph 2 probably means that trees .
A. compete for survival
B. protect their own wealth
C. depend on each other
D. provide support for dying trees
2.“Mother trees”are very important because they .
A. look the largest in size in the forest
B. pass on nutrition to young trees
C. bring more wealth to humans
D. know more about the “tree societies”
3.The underlined word “it” in the last paragraph refers to(指代) .
A. how “tree societies” work
B. how trees grow old
C. how forestry industry develops
D. how young trees survive
4.We can learn from the passage that .
A. trees aren’t as complex as we think.
B. Charles Darwin had the same opinion as Simard.
C. if “Mother trees” are cut down, they won’t make difference to young trees.
D. trees can share resources with other ones by the underground fungi networks.
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Would it surprise you to learn that, like animals, trees can communicate with each other and pass on their wealth to the next generation--their young trees?
Suzanne Simard, forest ecologist at the University of British Columbia, explains how trees are much more complex than most of us ever imagined. Simard and her colleagues have made the major discovery that trees and plants really do communicate and interact with each other.
Trees live on through their group work and support, passing around the resources such as nitrogen and carbon “depending on who needs it by miles of underground fungi（真菌） networks. This makes sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This system works in a very similar way to the networks of neurons（神经元） in our brains, and when one tree is cut down, it affects all.
Simard talks about "Mother Trees". These are the largest, oldest trees that rise above the forest, a concept explained in the movie Avatar. These “Mother Trees" are connected to all the other trees in the forest by this network of fungi, and may manage the resources of the whole trees and plants in the forest. She explains how these trees pass on the wealth to the next generation, transporting important resources to young trees so they may continue to grow. When humans cut down "Mother Trees" without paying attention to these highly complex "tree societies” or the networks on which they feed, we are losing the chances to save the whole forest.
"We didn't take any notice of it,” Simard says sadly. “Mother Trees move nutrition into the young trees before dying, but we never give them a chance.” If we could send this message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.
1.Trees can share resources with other ones by________.
A.the help from animals B.underground fungi networks
C.the communication with people D.neurons in the system of brains
2."Mother Trees" are very important because they________.
A.bring wealth to the scientists B.pass on nutrition to young trees
C.get more from the complex “tree societies” D.seem more likely to be cut down by humans
3.The underlined word “it” in the last paragraph refers to________ .
A.how trees grow old B.how "tree societies" work
C.how young trees are saved D.how forestry industry develops
4.What would be the best title for the passage?
A.Trees Are Rich in Resources B.Trees Are Good for Our Society
C.Trees Are in Need of Protection D.Trees Are More Complex Than We Think
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Would it surprise you to learn that, like animals, trees can communicate with each other and pass on their wealth to the next generation—their young trees?
Suzanne Simard, forest ecologist (生态学家) at the University of British Columbia, explains how trees are much more complex (复杂的) than most of us ever imagined. Although Charles Darwin (达尔文) thought that trees are competing for survival of the fittest, Simard and her team have made a new discovery and showed just how wrong he was. In fact, the opposite is true: trees survive through their group work and support, passing around necessary nutrition (营养) such as nitrogen (氮) and carbon "depending on who needs it".
Nitrogen (氮) and carbon are shared through miles of underground fungi (真菌) networks. This makes sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it influences all.
Simard talks about "Mother trees". These are usually the largest, oldest plants on which all other trees depend. These "Mother trees" are connected to all the other trees in the forest by this network of fungi, and may manage the resources of the whole trees and plants in the forest. She explains how these trees pass on the wealth to the next generation, transporting important resources to young trees so they may continue to grow. When humans cut down "Mother trees" without paying attention to these highly complex "tree societies" of the networks on which they feed, we are reducing the chances to save the whole forest.
"We didn't take any notice of it," Simard says sadly. "Mother trees" move nutrition into the young trees before dying, but we never give them chance. If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.
1.The underlined sentence "the opposite is true" in Paragraph 2 probably means that trees ________.
A.compete for survival B.protect their own wealth
C.depend on each other D.provide support for dying trees
2."Mother trees" are very important because they ________.
A.look the largest in size in the forest B.pass on nutrition to young trees
C.bring more wealth to humans D.know more about the "tree societies"
3.We can learn from the passage that ________.
A.trees aren't as complex as we think
B.Charles Darwin had the same opinion as Simard
C.if "Mother trees" are cut down, they won't make difference to young trees
D.trees can share resources with other ones by the underground fungi networks
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Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation—their young trees?
Professor Simard , forest ecologist( 生态学家) from the University of British Columbia, explains how trees are much more complex（复杂）than most of us ever imagined. Although Charles Darwin（达尔文） thought that trees are competing for survival of the fittest, Simard and her team have made a new discovery and showed just how wrong he was. In fact,the opposite is true: trees survive through their group work and support, passing around necessary nutrition (营养) like Nitrogen (氮) and carbon "depending on who needs it".
Nitrogen and carbon are shared through miles of underground fungi (真菌) networks, This makes sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it affects all.
Simard talks about "mother trees", These are usually the largest and oldest plants on which all other trees depend. These “Mother Trees” are connected to all the other trees in the forest by this network of fungi, and may manage the resources of the whole trees and plants in the forest. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down "Mother Trees" without paying attention to these highly complex "tree societies" or the networks on which they feed, we are reducing the chances to save the whole forest.
"We didn't take any notice of it" Simard says sadly. "Mother trees move nutrition into the young trees before dying, but we never give them chance." If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.
1.The underlined sentence "the opposite is true" in Paragraph 2 probably means that trees_______.
A. compete for survival B. protect their own wealth
C. depend on each other D. provide support for dying trees
2."Mother trees" are extremely important because they________.
A. look the largest in size in the forest
B. pass on nutrition to young trees
C. seem more likely to be cut down by humans
D. know more about the complex "tree societies"
3.The underlined word "it" in the last paragraph refers to__________.
A. how "tree societies" work B. how trees grow old
C. how forestry industry develops D. how young trees survive
4.What would be the best title for the passage?
A. Old Trees Communicate Like Humans
B. Young Trees Are In Need Of Protection
C. Trees Are More Awesome Than You Think
D. Trees Contribute To Our Society
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Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?
UBC Professor Simard explains how trees are much more complex than most of us ever imagined. Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their co-operation and support, passing around necessary nutrition "depending on who needs it".
Nitrogen (氮) and carbon are shared through miles of underground fungi networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons in our brains, and when one tree is destroyed, it affects all.
Simard talks about "mother trees", usually the largest and oldest plants on which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down "mother trees" with no awareness of these highly complex "tree societies" or the networks on which they feed, we are reducing the chances of survival for the entire forest.
"We didn't take any notice of it" Simard says sadly. "Dying trees move nutrition into the young trees before dying, but we never give them chance." If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.
1.The underlined sentence "the opposite is true" in Paragraph 2 probably means that trees .
A. compete for survival B. protect their own wealth
C. depend on each other D. provide support for dying trees
2."Mother trees" are extremely important because they .
A. look the largest in size in the forest B. pass on nutrition to young trees
C. seem more likely to be cut down by humans D. know more about the complex "tree societies"
3.The underlined word "it" in the last paragraph refers to .
A. how "tree societies" work B. how trees grow old
C. how forestry industry develops D. how young trees survive
4.We can learn from the passage that _______.
A. trees aren’t as complex as we think
B. Charles Darwin had the same opinion as Simard
C. if “Mother trees” are cut down, they won’t make difference to young trees.
D. trees can share resources with other ones by the underground fungi networks.
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Would you be surprised to learn that your eyes are like an eagle’s eyes in some ways? You and an eagle can see colors. And an eagle’s eyes and yours are about the same size. But therre are a lot more of a special type of cell in an eagle’s eyes than in your eyes. These cells send information to the eagle’s brain. Getting a lot of information helps an eagle see much better than you. In fact, eagle can spot a fish in the sea from a mile away.
You and an eagle have eyes that make tears. Your eyes make watery tears that clean your eyes. An eagle’s eyes for watery tears and oily tears. Eagles dive into the sea to catch fish. The oily tears guard their eyes from the saltwater.
Like y
ou, eagles have eyelids. You have two eyelids, and you close your eyes by lowering the top lid. When eagles close their eyes, their bottom lids raise up. Eagles have a third eyelid that moves across the eye every few seconds. It wipes dust away from the eye. An eagle can see through this third eyelid. The eyelid guards the bird’s eyes when it swoops at 100 miles an hour after its prey(捕食).
1.How are your eyes like an eagle’s eyes?
A. You both have three eyelids. B. You bothe see colors.
C. Your eyes have the same number of special cells as an eagle’s eyes.
2.Your eyes help you learn about the world. An eagle’s eyes help it_______.
A. catch its prey B. fly fast
C. blink its eyelids D. send information
3.Unlike your eyes, an eagle’s eyes __________.
A. have cells B. can see colors
C. have an extra eyelid D. form tears
4.How is the way an eagle blinks(眨眼) different from the way you blink?
A. An eagle moves both its top and bottom eyelids.
B. An eagle moves its bottom eyelid.
C. An eagle moves its top eyelid.
D. An eagle uses three eyelids to blink.
5.The word “swoop” is closed in meaning to _________.
A. 俯冲 B. 飞翔 C. 展翅 D. 冒险
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When you watch TV programs about wild animals, it is surprising to see how an antelope (羚羊) can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways to fight off enemies.
Over millions of years, plants have developed their own defense system (防卫系统). Chemicals are fantastically used by plants to survive (幸存). By making their leaves, flowers, roots and fruits poisonous (有毒的) to enemies, plants can fight back.
One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree’s leaves, the amount (数量) of poison increases in the other leaves. “It’s like the injured leaves telephoning the others to fight together against the enemy,” he said.
The tree also sends defense messages to neighboring plants by giving out a special smell. Golden Wattle trees in the nearby 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees’ leaves, he will die.
Every kind of plant or tree is good at producing a special set of chemicals. Herbivores, like rabbits, can safely eat the leaves of one tree, but they may be poisoned by its neighbor.
In this way, plants have not only developed their own defense system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.
1.From the first 2 paragraphs, we can learn that _________.
A. plants can do nothing against their enemies
B. chemicals are quite useful for plants to survive
C. an antelope can always run away from a strong lion
D. leaves, roots, flowers and fruits of plants are poisonous
2.If animals eat one Golden Wattle tree’s leaves, the tree can________.
A. kill the animals with a special smell
B. tell other trees to come to protect it
C. warn other trees against the animals on the phone
D. send defense messages to the neighboring plants
3.The underlined word “herbivores” in the 5th paragraph probably means animals which _____.
A．produce poison B．live on small animals
C．like to eat rabbits D．feed on plants or grass
4.The last paragraph of the passage suggests that this kind of defense system is ________.
A．bad for animals B．good for forests
C．helpful to some animals D．harmful to forests
5.The passage is mainly about __________.
A．the examples of protecting forests
B．the balance between animals and plants
C．the ways of plants fighting against enemies
D．the relationship between lions and antelopes
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When you watch TV programs about wild animals, it is surprising to see how an antelope (羚羊) can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways to fight off enemies.
Over millions of years, plants have developed their own defense system (防卫系统). Chemicals(化学物) are fantastically used by plants to survive . By making their leaves, flowers, roots and fruits poisonous (有毒的) to enemies, plants can fight back.
One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree's leaves, the amount (数量) of poison increases in the other leaves. "It's like the injured leaves telephoning the others to fight together against the enemy", he said.
The tree also sends defense messages to neighboring plants by giving out a special smell. Golden Wattle trees in the nearby 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees' leaves, he will die.
Every kind of plant or tree is good at producing a special set of chemicals. Herbivores, like rabbits, can safely eat the leaves of one tree, but they may be poisoned by its neighbor.
In this way, plants have not only developed their own defense system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.
1.From the first 2 paragraphs, we can learn that_______.
A. plants can do nothing against their enemies
B. chemicals are quite useful for plants to survive
C. an antelope can always run away from a strong lion
D. leaves, roots, flowers and fruits of plants are poisonous
2.The underlined word "herbivores" in the 5th paragraph probably means animals which_______.
A. produce poison B. live on small animals
C. like to eat rabbits D. feed on plants or grass
3.The last paragraph of the passage suggests that this kind of defense system is_______.
A. bad for animals B. good for forests
C. helpful to some animals D. harmful to forests
4.The passage is mainly about_____________________.
A. the examples of protecting forests
B.the balance between animals and plants
C. the ways of plants fighting against enemies
D. the relationship between lions and antelopes
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When you watch TV programs about wild animals, it is surprising to see how an antelope can run away from a lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways of fighting off enemies.
Over millions of years of evolution, plants have developed their own defence system(防御系统). Chemicals are wildly used for survival（生存）. By making their leaves, flowers, roots and fruits distasteful or poisonous(有毒的) to enemies, plants can fight back.
One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree’s leaves, the amount of poison increases in the other leaves. “It’s like the damaged leaves telephoning the others telling them to fight together against the enemy, ” he said.
The tree also sends defence messages to neighboring plants by giving out a special smell. Golden Wattle trees in the surrounding 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees’ leaves, it will die.
Every species of plant or tree is good at the production of a particular set of chemicals. A herbivore that can safely eat the leaves of one tree may be poisoned by its neighbor.
In this way, plants have developed not only individual defence system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.
1.From the first 2 paragraphs,we can learn that________
A. plants can do nothing against their enemies.
B. Chemicals are quite useful for plants to survive.
C. An antelope can always run away from a strong lion.
D. Leaves,roots,flowers and fruits of plants are poisonous.
2.If animals eat one Golden Wattle tree’s leaves,the tree can________
A. kill the animals with special smell.
B. tell other trees to come to protect it.
C. warn other trees against the animals on the phone.
D. send defence messages to the neighboring plants.
3.The word “herbivore” in the 5th paragraph probably means animals which ____.
A. produce poison
B. live on small animals
C. like to eat rabbits
D. feed on plants or grass
4.The last paragraph of the passsage suggests that this kind of defence system is_____
A. bad for animals
B. good for forests
C. helpful to some animals
D. harmful to forests.
5.The passage is mainly about______
A. the example of protecting forests
B. the balance between animals and plants
C. the ways of plants fighting against enemies
D. the relationship between lions and antelopes
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-Would you like to be Terry's neighbour? -Yes. He can help me_______ English.
A. learns B. learning C. learn D. learned
ou, eagles have eyelids. You have two eyelids, and you close your eyes by lowering the top lid. When eagles close their eyes, their bottom lids raise up. Eagles have a third eyelid that moves across the eye every few seconds. It wipes dust away from the eye. An eagle can see through this third eyelid. The eyelid guards the bird’s eyes when it