The seawater takes a lot of heat in summer. A. up B. in C. over D. off 题目和参考答案——青夏教育精英家教网—

题目内容

The seawater takes _____ a lot of heat in summer.

A. up　　

B. in　　

C. over　　　

D. off

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D
Far from the land of Antarctica(南极洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.
For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.
Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.
The fish were taken from seawater that had a temperature of -1.88℃ and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05℃. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.
The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein(蛋白质) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.
Study showed that it is an unusual kind of protein. It has many small sugar molecules(分子) held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein, or AFGP.
68. What is the text mainly about?
A. The terrible conditions in the Antarctic.
B. A special fish living in freezing waters.
C. The ice shelf around Antarctica.
D. Protection of the Antarctic cod.
69. Why can the Antarctic cod live at the freezing temperature?
A. The seawater has a temperature of -1.88℃.
B. It loves to live in the ice-salt mixture.
C. A special protein keeps it from freezing.
D. Its blood has a temperature lower than -2.05℃.
70. What does the underlined word “it” in Paragraph 5 refer to?
A. A type of ice-salt mixture.         B. A newly found protein.
C. Fish blood.                               D. Sugar molecule.
71. What does “glycol-” in the underlined word “glycoprotein” in the last paragraph mean?
A. sugar                  B. ice                    C. blood                D. Molecule

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."
【小题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

【小题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

【小题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．

【小题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

The worst earthquake in 40 years shook South Asia on Sunday, starting with horrible waves that swept entire villages into the sea. At least 20,000 people in six countries were killed in the disaster, and millions were left homeless.
The quake shook deep beneath the Indonesian island of Sumatra. It was felt more than 3000 miles away in East Africa, where heavy tides kept fishermen at home and resorts（度假胜地）closed.
It was as if the sea had struck the land. Residents of Sri Lanka, a small island country off the coast of India, ran to the hills to find safety from the tsunami. Many took their radios, televisions, and other valuables with them. The disaster hit Sri Lanka hardest. Of its 20million people, 1 million lost their homes, and 10000 died.
“The water simply raised itself up and huge waves came ashore,” wrote eye-witness（目击者）Peter Thomas from India. “It was moving very fast. The force broke the glass walls of a restaurant on the beach here and damaged hundreds of boats.”
In some places, the tsunami struck with no warning. “The weather was fine with no clouds,” wrote an eye-witness in Indonesia. “Suddenly the seawater just hit the city. In some parts the water was up to chest level.”
A massive（大众的）effort to help the affected countries is already underway. Leaders from around the world have promised to help, and teams of aid workers and doctors are rushing to the sea. “The United States stands ready to offer all the help to those nations most affected.” Said White House spokesman Trent Duffy. Organizations from the Red Cross to the International Monetary Fund have started fund-raising（筹款）drives to make up the costs of rebuilding.
【小题1】 The underlined word “tsunami” in Paragraph 5 can probably be replaced by “__________.”

【小题2】 Which of the following is NOT true when this disaster happened?

A．A sudden storm started with thunder and lightning.

B．The seawater rose suddenly and flooded the land.

C．Huge waves came upon the land, damaging the buildings and boats.

D．The sea struck the land, causing heavy losses.

【小题3】In the last paragraph, the writer mainly states __________.

A．lack of help	B．international efforts
C．the fighting against the disaster	D．the result of disasters

【小题4】What’s the best title of the passage?

A．Tens of Thousands of People Are in Danger

B．Storm Caused Disasters in South Asia

C．Terrible Quake Hits South Asia

D．International Aid for South Asia

【小题5】Where would you probably see this passage?

A．In a textbook.	B．In a newspaper.
C．In a travel guide.	D．In a dictionary.

Far from the land of Antarctica (南极洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.

For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.

Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.

The fish were taken from seawater that had a temperature of -1.88℃ and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05℃. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.

The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein (蛋白质) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.

Study showed that it is an unusual kind of protein. It has many small sugar molecules (分子) held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein, or AFGP.

1.What is the text mainly about?

A．The terrible conditions in the Antarctic.

B．A special fish living in freezing waters.

C．The ice shelf around Antarctica.

D．Protection of the Antarctic cod.

2.Why can the Antarctic cod live at the freezing temperature?

A．The seawater has a temperature of - l.88℃

B．It loves to live in the ice-salt mixture.

C．A special protein keeps it from freezing.

D．Its blood has a temperature lower than -2.05℃

3.What does the underlined word “it” in Paragraph 5 refer to?

A．A type of ice-salt mixture. B．A newly found protein

C．Fish blood. D．Sugar molecule.

4.What does “glyco-” in the underlined word “glycoprotein” in the last paragraph mean?

A．sugar B．ice C．blood D．molecule

The USA, New York—Whales and dolphins are facing increasing threats from climate change, according to a new report published by WWF and the Whale and Dolphin Conservation Society （WDCS）．

The report "Whales in hot water?" draws attention to the growing impacts of climate change on whales．They range from changes in sea temperature and the freshening of the seawater because of the melting of ice and increased rainfalls, to a sea level rise, loss of icy polar habitats and the decline of krill populations in key areas．Krill, a tiny shrimp that is dependent on sea ice, is the main source of food for many of the great whales．

The speeding up of climate change adds greatly to trouble from other human activities, such as chemical and noise pollution, which kills some 1000 whales every day．

"Whales and dolphins have an ability to adapt to their changing environment," said Mark Simmonds, International Director of Science at WDCS．"But the climate is now changing at such a fast pace that it is unclear to what extent whales and dolphins will be able to adjust．"

Climate change impacts are currently greatest in the Arctic and the Antarctic．According to the report, cetaceans that rely on polar, icy waters for their home and food resources are likely to be greatly affected by the reduction of sea ice cover．

WDCS and WWF are urging governments to cut global production of C02 by at least 50 percent by the middle of this century．The latest report of the Intergovernmental Panel on Climate Change showed it was possible to stop global warming if the world's emissions start to decline before 2015．

1.Which of the following is the most important for whales and dolphins?

A．Rainfall

B．Krill

C．Sea ice cover

D．High sea level

2.From the passage, we can learn that whales mainly feed on _____．

A．dolphins

B．krill

C．sea horses

D．sharks

3.The underlined word "decline" in Paragraph 2 means _____．

A．increase

B．control

C．protection

D．fall

4.In what place is climate change greatest?

A．The Pacific Ocean	B．Asia．
C．Two polar areas．	D．Equator．

5.Which of the following is not right according to the passage?

A．Climate change will lead to the changes in sea temperature．

B．Climate change will result in the freshening of the sea water．

C．Climate change will have a bad effect on human activities and whales．

D．Human beings will forever have no ability to stop global warming．

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