Some plants can take in carbon dioxide we bre...

Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.

A. in case               B. in turn              C. in return        D. in addition

高三英语单项填空困难题查看答案及解析

We all think plants were expected to get larger with increased carbon dioxide in the atmosphere, but changes in temperature, humidity(湿度)and nutrient availability seem to have trumped the benefits of increased carbon dioxide” said researchers from the National University of Singapore.

45 percent of the species studied now reach smaller adult sizes than they did in the past. The researchers pointed out that warmer temperatures and changing habitats, caused by climate change, are possible reasons for shrinking creatures.

“ We do not yet know the mechanisms(机制)involved, or why some organism are getting smaller while others are unaffected,” the researchers said. “Until we understand more, we could be risking negative consequences that we can’t yet quantify. ’’

The change is big in cold-blooded animals. Only two decades of warmer temperatures are enough to make retiles (爬行动物)smaller. An increase of only 1 degree centigrade caused nearly a 10 percent increase in metabolism(新陈代谢). Greater use of energy resulted in tiny tortoises and little lizards. Fish are smaller now too. Though overfishing has played a part in reducing numbers, experiments show that warmer temperatures also stop fish growing.

Warm-blooded animals aren’t immune(免除)from the size change caused by climate change. Many birds are now smaller. Soay sheep are thinner. Red deer are weaken And polar bears are smaller, compared with historical records.

This is not the first time this has happened in Earth’s history. 55 million years ago, a warming event similar to the current climate change caused bees, spiders and ants to shrink by 50 to 75 percent over several thousand years. That event happened over a longer time than the current climate change.

The speed of modem climate change could mean organisms may not respond or adapt quickly enough, especially those with long generation times climate change will be shown in the future.

1.What does the text mainly talk about_______

A. Why some species become smaller.

B. How climate changes in Earth’s history?

C. Climate change has many negative effects.

D. Species are becoming smaller as climate gets warmer.

2.The underlined word “trumped” m the first paragraph probably mean_________.

A. strengthened　　 B. gained

C. beaten　　 D. equaled

3.Researchers from the National University of Singapore believe that________

A. they have found the exact causes for creatures getting smaller.

B. all the animals on the earth have become smaller.

C. climate change has more negative effects on warm-blooded animals.

D. increase in energy use can lead to creatures getting smaller.

4.What does the author feel about the climate change?

A. Disappointed　　 B. Optimistic

C. Worried　　 D. Shameful

高三英语阅读理解简单题查看答案及解析

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

A．that　 B．when　 C．what　 D．how

高三英语单项填空中等难度题查看答案及解析

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

A． that　 B．when　 C．what　 D．how

高三英语单项填空中等难度题查看答案及解析

Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

A．difference         B．comparison        C．connection        D．barrier

高三英语单项填空中等难度题查看答案及解析

Carbon dioxide, which makes a ________ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

A．difference　　 　 　 　 B．comparison

C．connection　 　　 　 　 D．barrier

高三英语单项填空中等难度题查看答案及解析

An increased concentration of carbon dioxide and certain other gases in the Earth’s atmosphere ______ global warming.

A. contributing to　　　　 B. contribute to

C. contributes to　　 　　 D. to contribute to

高三英语单项填空简单题查看答案及解析

Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO₂ is also affecting the ocean chemistry and potentially harming sea life.

Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades.

"We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO₂ levels. And we've been able to record this increasing quantity of atmospheric CO₂ into the ocean."

Scientists expected that as atmospheric CO₂ increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.

"As carbon dioxide dissolves（溶解） in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO₂ in the atmosphere goes up and that exchanges with the surface seawater, it drives the pH down, and makes it more acidic."

The seawater Dore and his colleagues have analyzed confirms what the theory predicts.

The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO₂ and then moved to those depths. Or there could be a biological explanation.

"It's important to realize that the oceans are really becoming acidic. And it can have negative impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."

1.What can be the best title of the passage?

A．Sea Life Facing Danger                                  B．Climate Change Affecting Seawater

C．Oceans Becoming More Acidic                     D．Scientist Researching Seawater

2.Which of the following shows the process of the impact of atmospheric CO₂ on sea life?

a．Sea life is endangered．

b．CO₂ goes into the surface water．

c．The ocean chemistry is affected．

d．CO₂decreases the PH and makes the seawater more acidic．

e．CO₂ levels in the atmosphere go up．

A.    a    →  b   →  c  →  d   →  e

B.    e   →  b   --→ c  →  d   →  a

C.    a    →  e   -→  b  →  c   →  d

D.    e    →  d   -→  c  →  b   →  a

3.Scientist Robert Dore came to the conclusion based on________ .

A．his research and analysis

B．a major cause of climate change

C．some former theory

D．the expectation of other scientists

4.What does the passage want to tell us most?

A．It takes time to make a scientific study．

B．Atmospheric CO2 is doing harm to sea life．

C．Robert Dore is a committed and serious scientist．

D．Measures should be taken to prevent the potential catastrophe．

高三英语阅读理解中等难度题查看答案及解析

Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO₂ is also affecting the ocean chemistry and potentially harming sea life.

Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades. We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO₂ levels. And we've been able to record this increasing quantity of atmospheric CO₂ into the ocean.

Scientists expected that as atmospheric CO₂ increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.

"As carbon dioxide dissolves（溶解） in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO₂ in the atmosphere goes up and that exchanges with the surface seawater, it drives the PH down, and makes it more acidic."

The seawater Dore and his colleagues have analyzed confirms what the theory predicts.

The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO₂ and then moved to those depths. Or there could be a biological explanation.

"It's important to realize that the oceans are really becoming acidic. And it can have negative（消极的） impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."

1.What can be the best title of the passage?

A．Sea Life Facing Danger

B．Scientist Researching Seawater

C．Oceans Becoming More Acidic

D．Climate Change Affecting Seawater

2.With the increase of atmospheric CO₂，________.

A．more corals will appear in the sea

B．the surface water is becoming warmer

C．the chemical balance of the seawater is affected

D．the PH of the ocean out here has been increasing

3.Which of the following shows the process of the impact of atmospheric CO₂ on sea life?

a．Sea life is endangered．

b．CO₂ goes into the surface water．

c．The ocean chemistry is affected．

d．CO₂decreases the PH and makes the seawater more acidic．

e．CO₂ levels in the atmosphere go up．

4.Scientist Robert Dore came to the conclusion based on________.

A．his research and analysis

B．the expectation of other scientists

C．some former theory

D．a major cause of climate change

高三英语阅读理解中等难度题查看答案及解析

If we planted a lot more trees in just the right places, they could reduce the amount of carbon in the atmosphere to levels not seen since the 1920s, said study leader Jean Francois Bastin, an ecologist from the Swiss Federal Institute of Technology. After examining more than 70,000 high-quality satellite photos of trees from all over the planet, ecologists concluded that the earth could support 900 million additional hectares (公顷) of tree cover.

Bastin and his colleagues developed a computer program that estimates how much forested land could be restored both now and in a future warmer world. The team members combed through 78,774 satellite photos of a variety of ecosystems- everywhere from the thick Amazon rainforest to the dry Sahel in Africa-that had been protected from human influence. They counted every tree in every photo to assess the current tree coverage in natural environments. The researchers combined that information with data about the climate, temperature and soil conditions for each ecosystem. Then they taught their program to put it all together to determine how much tree coverage a particular area could support.

The result shows trees currently cover 2.8 billion hectares of land- but they have the potential to populate as much as 4.4 billion hectares. Right now, much of the additional 1.6 billion hectares is being used for agriculture or urban spaces. The researchers took those areas off the table and saw that the earth still has 900 million hectares ready and waiting to be restored with trees an area roughly the size of Brazil. When those trees mature, they could remove 205 gigatonnes (兆吨) of carbon from the atmosphere, the study calculated, That represents about two-thirds of the roughly 300 gigatonnes of atmospheric carbon that can be traced to human actions, they said.

Even if trees are planted in the most mindful way, other actions are still needed to fight climate change, Bastin said.

1.Why did Bastin develop a computer program?

A.To reduce air pollution in Africa.

B.To determine carbon dioxide in the air.

C.To assess the potential forested land.

D.To calculate the area of forest in the world.

2.What does the underlined phrase “combed through” in Paragraph 2 refer to?

A.Looked into. B.Put away.

C.Brought back. D.Took in.

3.What can we infer from what Basin said in the last paragraph?

A.Brazil has large areas to plant trees.

B.The tree cover is not enough to control greenhouse gases.

C.Trees removed two-thirds of carbon in the atmosphere.

D.Other actions are equally important compared to planting trees.

4.What is the author’s attitude towards the research result?

A.Disapproving. B.Doubtful.

C.Supportive. D.Objective.

高三英语阅读理解困难题查看答案及解析