According to Charles Keeling, the amount of c...

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According to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.
A. increased　　　　　　　　　 B. had increased
C. had been increased　　　 D. was increasing

高三英语单项填空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 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
In the atmosphere， carbon dioxide acts rather like a one-way mirror the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from escaping.
According to a weather expert's prediction， the atmosphere wilbe3C warmer in the year 2050thanitis today， if man continues to burn fuels at the present rate.If this warming up took place， the icecaps in the poles would begin to melt thus raising sea level several meters and severely flooding coastal cities.Also， the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere(半球) ， possibly resulting in an alteration of the earth's chief food-growing zones.
In the past， concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic， which maybe affected by only a few degrees of warming：in other words， by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.
However， most of the fuel is burnt in the northern hemisphere， where temperatures seem to be falling Scientists conclude，therefore，that up to now natural influences on the weather have exceeded those caused by man.The question is：Which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and“cold”spots(that is， the relatively less hot spots) on the sun.As the sun rotates(旋转) ， every 27.5 days it presents hotter or“colder”faces to the earth， and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth's atmospheric pressure， and consequently on wind circulation.The sun is also variable over along term：its heat output goes up and down in cycles， the latest trend being downward.
Scientists are now finding mutual relations between models of solar-weather interactions and the actual climate over many thousands of years， including the last Ice Age.The problem is that the models are predicting that the world should be entering a new Ice Age and it is not.One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia(惯性) of the earth's climate.If this is right，the warming effect of carbon dioxide might thus be serving as a useful counter-balance to the sun's diminishing(减少) heat.
1.Why is the fuel consumption greater in then or them hemisphere， but temperatures there seem to be falling?
A.Mainly because the levels of carbon dioxide are rising.
B.Possibly because the output of solar energy varies.
C.Because the inertia of the earth's climate take effect.
D.Possibly because the icecaps in the poles are melting
2.On the basis of their models， scientists are of the opinion that
A.the climate of the world should be becoming cooler
B.the new Ice Age will be delayed by the greenhouse effect
C.the man-made warming effect helps to increase the solar effects
D.it will take thousands of years for the inertia of the earth's climate to take effect
3.If the assumption about the delay of a new Ice Age is correct，　　　 .
A.the best way to overcome the cooling effect would be to burn more fuels
B.ice would soon cover the northern hemisphere
C.the increased levels of carbon dioxide would warm up the earth quickly
D.the greenhouse effect could work to the advantage of the earth
4.The purpose of the article is to explain　　　 .
A.the greenhouse effect
B.the solar effects on the earth
C.the models of solar-weather interactions
D.the causes affecting weather

高三英语阅读理解困难题查看答案及解析
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
Now, according to a recent Brigham Young University study, the amount of time between sunrise and sunset is the clear winner among other weather variables when it comes to improving your mental and emotional health.
In this unique study-which brought together a psychologist, physicist and statistician-the researchers explored how someone’s mood is linked to weather and associated factors such as sunshine, cloudy days, temperature, rain and pollution. The study found that people are more likely to report mental trouble during shorter days with less sunshine.
It is generally believed that hot days, rainy days or days with thick pollution would make one feel more down and depressed. But the study came up with a surprising finding. It found that more than any other factor, reduced sun hours could increase mental distress（痛苦）while soaking up in sun makes things all right.
The results highlighted that the duration（时长）of the daylight was more significant in influencing people’s moods than the amount of sun rays being absorbed.
“On a rainy day, or a more polluted day, people assume that they’d have more distress. But we didn’t see that. We looked at solar irradiance（太阳辐照）, or the amount of sunlight that actually hits the ground. We tried to take into account cloudy days, rainy days pollution… but they washed out. The one thing that was really significant was the amount of time between sunrise and sunset,” said professor Becker in a press release.
Many studies have attempted to explore the link between the weather and its effect on one’s mood, but the results were not conclusive. For this study, many important reason were taken into account-making the research an improvement to the previous ones.
The study concluded that public health should plan on effective strategies that can prevent emotional distress during periods when the sun time is less, such as in winter months.
1.What will affect your emotion most according to the new study?
A.The surroundings. B.The amount of sunshine.
C.The weather conditions. D.The duration of sunlight.
2.Why does the author think that the new finding in paragraph 3 is surprising?
A.Because it is a conclusion of three scientists.
B.Because it is different from the general belief.
C.Because it is too difficult to understand.
D.Because it is affected by so many factors.
3.Which season benefits people’s emotion more according to this study?
A.Spring. B.Summer.
C.Autumn. D.Winter.
4.What is the purpose of this new study?
A.To find ways to prevent depression.
B.To know more about the weather.
C.To provide strategies for public health.
D.To find how the weather affects mood.

高三英语阅读理解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
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