C 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. 29. 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 30. "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" 31. 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 32. 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 查看更多

 

题目列表(包括答案和解析)

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?

It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide(二氧化碳).

What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.

The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.

We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 

All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.

The questions asked in the first paragraph are used to _____.

A. show the author’s concern about food safety

B. express the author’s puzzlement at what to eat

C. remind readers of something delicious to eat

D. introduce the topic to be discussed in the passage

What is the bad news for meat-eaters?

A. Meat producing can cause global warming

B. Most cows are raised not for people to eat

C. There is a lot of carbon dioxide in meat

D. Animals begin to die off because of global warming

Which is the most environment-friendly food according to the passage?

  A. Beef                     B. Carrot               C. Pork                 D. Chicken

The author wrote the passage in order to _____.

  A. explain the importance of eating meat         B. advise people to keep a balanced diet

C. encourage people to choose a greener diet       D. introduce some healthy foods to people

查看答案和解析>>

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?
It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide(二氧化碳).
What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.
The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.
We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 
All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.
【小题1】The questions asked in the first paragraph are used to _____.

A.show the author’s concern about food safety
B.express the author’s puzzlement at what to eat
C.remind readers of something delicious to eat
D.introduce the topic to be discussed in the passage
【小题2】What is the bad news for meat-eaters?
A.Meat producing can cause global warming
B.Most cows are raised not for people to eat
C.There is a lot of carbon dioxide in meat
D.Animals begin to die off because of global warming
【小题3】Which is the most environment-friendly food according to the passage?
A.BeefB.CarrotC.PorkD.Chicken
【小题4】The author wrote the passage in order to _____.
A.explain the importance of eating meatB.advise people to keep a balanced diet
C.encourage people to choose a greener dietD.introduce some healthy foods to people

查看答案和解析>>

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?

It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide(二氧化碳).

What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.

The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.

We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 

All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.

1.The questions asked in the first paragraph are used to _____.

A.show the author’s concern about food safety

B.express the author’s puzzlement at what to eat

C.remind readers of something delicious to eat

D.introduce the topic to be discussed in the passage

2.What is the bad news for meat-eaters?

A.Meat producing can cause global warming

B.Most cows are raised not for people to eat

C.There is a lot of carbon dioxide in meat

D.Animals begin to die off because of global warming

3.Which is the most environment-friendly food according to the passage?

A.Beef

B.Carrot

C.Pork

D.Chicken

4.The author wrote the passage in order to _____.

A.explain the importance of eating meat

B.advise people to keep a balanced diet

C.encourage people to choose a greener diet

D.introduce some healthy foods to people

 

查看答案和解析>>

Think about what you had for lunch. Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can effect the whole planet?

___71 ___ Last week, scientists presented new studies showing how food and its production affect the globe and its warming climate. The researchers had some bad news for meat-eaters. They also offered some suggestions for how to eat in a more environmentally friendly way.

     ___72____ For many years, scientists have warned that our planet is getting warmer. If current trends continue, animals may start to die off and life could get very difficult for everyone. The temperature is on the rise for more than a century, and human kind has been releasing massive amount of gases into the atmosphere,called “greenhouse gases”. ___73____ One of these greenhouse gases is carbon dioxide(二氧化碳).

    What does this have to do with food? A big chunk of the carbon dioxide that we put into the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon dioxide. For example, a cow has to be fed and raised on farmland, and cow manure(粪肥) is a major source of methane(甲烷) ----- an especially potent greenhouse gas.The meat has to be processed to a consumer, which takes fuel.

___74___To grow and eat a pound of potatoes,for example, sends less than one quarter pound of carbon dioxide or equal warming gases into the air.___75___

A. It can ---- in a big way.

B. You’ve probably heard of global warming.

C. Global warming is a problem that the world is solving.

D. These gases surround the planet and keep heat from escaping the atmosphere.

E. Producing the production of meat can consume more energy and natural resources.

F. All kinds of meat on the planet, the scientists reported, are harder than vegetables.

G. So shifting our diet to less meat and more vegetables may do some good for the world.

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Has someone suggested there _______ be an international language all could understand and use ______?  

A can; it     B /;/     C would; it     D may;/

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