Global warming caused by human being’s casual...

Global warming caused by human being’s casual behaviour has become a major _______ for people all over the world.

A．conflict           B．concern           C．challenge         D．factor

高二英语单项填空简单题查看答案及解析

Rising sea levels and drought caused by global warming could          an increasing number of natural disasters.

高二英语单项填空简单题查看答案及解析

The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.

A. by which     B. for which        C. that             D. what

高二英语单项填空中等难度题查看答案及解析

It is human activities on the earth that are to ______global warming.

A. be blamed for                 B. blame for

C. take charge of                D. be responsible with

高二英语单项填空中等难度题查看答案及解析

The global warming is more and more serious, for which human beings ______．

A．are blaming                B．are to blame

C．are going to blame        D．are to be blamed

高二英语单项填空中等难度题查看答案及解析

It is human activities on the earth that are to _______  global warming.

A. be blamed for    B. to blame for    C. take charge of   D. be responsible with

高二英语单项填空中等难度题查看答案及解析

With coal and oil ________, what long-term effects of global warming on humans will be?

A. run out of         B. are using up       C. run out         D. running out of

高二英语单项填空中等难度题查看答案及解析

Antarctica(南极洲)’s melting ice, which has caused global sea levels to rise by at least 13.8 millimeters over the past 40 years, was thought to primarily come from the unstable West Antarctic Ice Sheet(WAIS). Now, scientists have found that the East Antarctic Ice Sheet (EAIS)—considered largely unaffected by climate change—may also be melting at an unexpectedly rapid speed.

The WAIS, whose base is below sea level, has long been considered the most likely to break down. Besides gravity, a deep current of warm water slips beneath the sheet, melting it from below until it becomes a floating shelf at risk of breaking away. In contrast, extreme cold and a base mostly above sea level are thought to keep the EAIS relatively safe from warm waters.

But as greenhouse gases warm much of the planet, driving stronger polar winds, some scientists think warm water carried by a circular current will start to invade East Antarctica’s once unassailable ice. A cooperation of more than 60 scientists last year, published in Nature, estimated that the EAIS actually added about 5 billion tons of ice each year from 1992 to 2017.

Eric Rignot of the University of California, Irvine, and colleagues combined 40 years of satellite imagery and climate modeling and found that overall Antarctica now sends six times more ice into the sea each year than it did in 1979, with the majority coming from West Antarctica. But East Antarctica was responsible for more than 30% of Antarctica’s contribution to the 13.8-millimeter sea level rise over the past 40 years. “The more we look at this system the more we realize this is fragile,” Rignot says. “Once these glaciers become unstable there is no red button to press to stop it.”

Rignot hopes the study brings greater attention to a part of Antarctica that has traditionally been understudied. Helen Fricker, a glaciologist (冰川学家) in California, agrees. “We need to monitor the entire Antarctica and we just can’t do that without international cooperation.”

1.What is the new finding of scientists?

A.The east Antarctica is losing ice at an increasing rate.

B.The west Antarctica is melting six times faster than in 1979.

C.5 billion tons of ice is added to Antarctica each year.

D.The sea level has risen by 13.8 mm over the past 40 years.

2.Which factor leads to the EAIS’s melting fast?

A.A base mostly over sea level. B.The force of gravity.

C.The invasion of a warm current. D.Extremely low temperature.

3.Which of the following best explains “unassailable” underlined in Para. 3 ?

A.Fragile. B.Unattackable.

C.Mild. D.Unstable.

4.Which way does Helen Fricker specially advocate?

A.Satellite imagery. B.Global monitoring.

C.Worldwide climate modeling. D.Worldwide combined efforts.

高二英语阅读理解困难题查看答案及解析

Antarctica(南极洲)’s melting ice, which has caused global sea levels to rise by at least 13.8 millimeters over the past 40 years, was thought to primarily come from the unstable West Antarctic Ice Sheet(WAIS). Now, scientists have found that the East Antarctic Ice Sheet (EAIS)—considered largely unaffected by climate change—may also be melting at an unexpectedly rapid speed.

The WAIS, whose base is below sea level, has long been considered the most likely to break down. Besides gravity, a deep current of warm water slips beneath the sheet, melting it from below until it becomes a floating shelf at risk of breaking away. In contrast, extreme cold and a base mostly above sea level are thought to keep the EAIS relatively safe from warm waters.

But as greenhouse gases warm much of the planet, driving stronger polar winds, some scientists think warm water carried by a circular current will start to invade East Antarctica’s once unassailable ice. A cooperation of more than 60 scientists last year, published in Nature, estimated that the EAIS actually added about 5 billion tons of ice each year from 1992 to 2017.

Eric Rignot of the University of California, Irvine, and colleagues combined 40 years of satellite imagery and climate modeling and found that overall Antarctica now sends six times more ice into the sea each year than it did in 1979, with the majority coming from West Antarctica. But East Antarctica was responsible for more than 30% of Antarctica’s contribution to the 13.8-millimeter sea level rise over the past 40 years. “The more we look at this system the more we realize this is fragile,” Rignot says. “Once these glaciers become unstable there is no red button to press to stop it.”

Rignot hopes the study brings greater attention to a part of Antarctica that has traditionally been understudied. Helen Fricker, a glaciologist (冰川学家) in California, agrees. “We need to monitor the entire Antarctica and we just can’t do that without international cooperation.”

1.What is the new finding of scientists?

A. The east Antarctica is losing ice at an increasing rate.

B. The west Antarctica is melting six times faster than in 1979.

C. 5 billion tons of ice is added to Antarctica each year.

D. The sea level has risen by 13.8 mm over the past 40 years.

2.Which factor leads to the EAIS’s melting fast?

A. A base mostly over sea level.　　 B. The force of gravity.

C. The invasion of a warm current.　　 D. Extremely low temperature.

3.Which of the following best explains “unassailable” underlined in Para. 3 ?

A. Fragile.　　 B. Unattackable.

C. Mild.　　 D. Unstable.

4.Which way does Helen Fricker specially advocate?

A. Satellite imagery.　　 B. Global monitoring.

C. Worldwide climate modeling.　　 D. Worldwide combined efforts.

高二英语阅读理解困难题查看答案及解析

Now scientists believe that global warming affects hibernating animals, causing them to wake up earlier. While this may seem a little concern, it is in fact a serious environmental problem. The shortened hibernation period could actually lead to significant decreases in the population of several species.

Some of the first evidence of the problem came from Colorado, where researchers at the Rocky Mountain Biological Lab have been observing marmot (旱獭) hibernation behavior since the 1970s. In the early days of their studies, marmots generally hibernated several weeks into the month of May. Nowadays, however, temperatures in the area have risen by 2.5 degrees Fahrenheit, and the marmots wake up about a month earlier.

At least the marmots are still hibernating. Several other animals have not been hibernating at all recently. Brown bears in the Spanish Cantabrian Mountains did not hibernate last year. Chipmunks (花鼠) in the US and some snakes in Australia also skipped the hibernation period. The bears seem to have survived without losing many individuals. The chipmunks and snakes, however, were not so lucky. Many of the animals died of starvation during the winter.

The problem with animals waking up early, or skipping hibernation altogether, lies with the creatures' metabolism (新陈代谢). When the animals hibernate, their metabolism drops significantly. The animals' heart rate slows, and they require very little energy to live. When the animals awake in the spring, their metabolism returns to normal.

But while their metabolism may be as active as it was before hibernation, food sources aren't as available as they were before. A marmot may wake up when temperatures get warmer, thinking it's spring, but plants will not have got the amount of sun they need to grow. So until the plants grow, the marmots have no reliable food source.

Many scientists believe the problem will continue to get worse. For many biologists, that's a scary prospect. Terry Root, an animal expert at Stanford University, said, “I do think what we will be facing is the extinction of many species.”

1. What is the viewpoint of the writer?

A. Global warming will continue to get worse as time goes on.

B. Waking up early in spring may lead to the extinction of some animals.

C. Shortened hibernation will definitely decrease the population of animals.

D. Animals which do not hibernate die of starvation.

2.The writer sets the example of the marmot in order to 　 .

A. indicate that global warming influences animals' hibernation

B. explain that the weather gets warmer and warmer now

C. show that the weather in the United States is quite different

D. say some animals do not hibernate now due to warm weather

3.Judging from recent observation, which of the following animals suffered the LEAST from shortened hibernation?

A. Brown bears.

B. Marmots.

C. Some snakes in Australia.

D. Chipmunks in the US.

4.Why can't marmots find enough food when they wake up?

A. Because there are too many marmots in the wild now.

B. Because more and more animal species skip hibernation now.

C. Because winter days end much earlier than before.

D. Because plants haven't received enough sunlight for spring growth.

高二英语阅读理解简单题查看答案及解析