Polar bears live mostly on __________ sea ice...

Polar bears live mostly on __________ sea ice, which they use as __________ platform for hunting seals.

A. a; a  　　 B. a; the　 　　 C. 不填; a 　　　 D. the; 不填

高三英语单项填空中等难度题查看答案及解析

Polar bears live mostly on_______sea ice,which they use as_______platform for hunting seals.

A.a;a                                   B.a;the

C.不填;a                                    D.the;不填

高三英语单项填空中等难度题查看答案及解析

As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.

高三英语单项填空中等难度题查看答案及解析

The Arctic Circle—the habitat of polar bears and decreasing sea ice at the top of the world—hit 32 degrees Celsius, last week.

This was the temperature in Banak, Norway on July 30, though some Norwegian areas even reached a couple degrees warmer, according to the European meteorology site severe-weather.eu. Banak sits atop northern Europe, over 350 miles above the bottom edge of the Arctic Circle.

The greater Northern Hemisphere and Europe itself have been repeatedly scorched by both record and near-record temperatures this summer, a consequence of overall rising global temperatures.

In the past 40 years, Earth’s climate has experienced an accelerated warming trend, which adds an extra level of background warming to hot spells—making heatwaves more extreme, climate scientists have said.

A photo of what appears to be Scandinavian folks taking a dip in a river while reindeer—the cold-adapted herbivores(食草动物)—cooled off in the water beside them is perhaps the best example of just how hot it is in parts of the Arctic Circle right now.

The “warm season” in Banak is short, lasting around three months, but the very warmest day of the year, around July 23, is usually around 62 degrees Fahrenheit(华氏度)—about 30 degrees cooler than temperatures there now. Overall, temperatures in northern Europe are between 14 to 21 degrees Fahrenheit, 8 to 13 degrees Celsius, above average.

All-time temperature records were set in both Norway and Finland on July 30, including 86 degrees Fahrenheit, 30 degrees Celsius, in Verde, near Banak, though extreme or near-record temperatures blanketed the region.

Persistent heat and dryness this summer have transformed normally green European countries into brown and yellow lands, and the continent’s extreme heat is expected to persist.

Andrew Derocher, a professor at the University of Alberta who studies polar bears, said climate change is shrinking the ice bears usually hunt on, making them faced with the danger of extinction.

1.What does the underlined word “scorched” in the third paragraph probably mean?

A. burned　　 B. achieved

C. scored　　 D. reached

2.What does the photo show according to the author?

A. Scandinavian folks like to swim in a river.

B. Reindeer have adapted to the cold climate.

C. The ice there has totally been melted into water.

D. The temperature of the Arctic Circle now is high.

3.What can you learn from Professor Derocher’s words?

A. Maybe bears will die out in the near future.

B. Climate change is threatening polar bears.

C. He is worried about the shrinking of the sea ice.

D. He advises people to do something to improve the condition.

4.Where may you find this article?

A. In a fashion magazine.　　 B. In a news report.

C. In a geography textbook.　　 D. In a travel handbook.

高三英语阅读理解中等难度题查看答案及解析

Because of global warming, the ice that polar bears depend on for survival _______.

高三英语单项填空简单题查看答案及解析

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Polar bears live in such environment that is too cold for most animals. For much of the year, they live and hunt on the 1. ________ (freeze) Arctic sea ice. Nature has prepared them for the cold conditions but nothing has prepared them for the danger 2. ________ 　 threatens(威胁) their only home.

The polar bears’ world is melting. Polar bears3. ________ (suffer) in a warmer world are in danger. Studies show that the polar ice 4. ________ (reduce) by 9.8% every 10 years since 1978.At present , about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend on the sea ice for their 5. ________ (survive). “The sea ice is more than just the platform that the bears walk　 6. ________ 　 ,” says Andrew Derocher, who studies North American polar bear populations. “Without 7. ________ , they can’t exist.”

Some melting and refreezing of the polar ice is natural. But in a 8. ________ 　 (warm) world, these cycles speed up, and bears have less time to hunt. 9. ________ 　 (normal), they have three months in the spring when they gain more weight and the extra fat is used later, 10. ________ the bears are not actively hunting. Therefore, it is urgent to protect the environment and maintain the ecological balance.

高三英语语法填空中等难度题查看答案及解析

A victim of climate change

A polar bear's dead body found on the Arctic island of Svalbard, the northernmost part of Norway, has shocked experts who say climate change may be to blame for the death. The starved polar bear in Norway was said to be in good bones by the time a group of explorers came across its body in July．

The bear is thought to have been heading north in a desperate search for sea ice that would allow it to hunt for seals．"From his lying position in death, the bear appears to simply have starved to health in April when the Norwegian Polar Institute examined and labeled it． However, the animal was reduced to skin and bones and died where he dropped," polar bear expert Dr. Ian Stirling, a professor at the University of Alberta said, "He had external suggestion of any remaining fat, having been reduced to little more than skin and bone．"

Stirling believes the bear starved to death as a result of a lack of sea ice which the animals use as a platform for hunting seals． That may also explain why the 16-year-old male bear was found about 155 miles north of where it was seen in April．

Arctic sea ice reached a record low in 2012, according to a report released this week by the National Oceanic and Atmospheric Administration that pointed to continued signs of climate change．

The International Union for Conservation of Nature currently classifies polar bears as vulnerable on its Red List of Threatened Species．

1.How did Stirling know the reason for the death of the polar bear?

A．By the food he ate．                         B．By doing further experiments．

C．By observing other polar bears．              D．By his lying position in death．

2.The underlined word "vulnerable" probably means _____．

A．easily hurt                        B．difficult to hunt

C．dangerous                        D．amazing

3.What is the author's attitude to the incident?

A．Favorable．           B．Uncaring．

C．Doubtful．             D．Concerned．

4.Where does this text probably come from?

A．A novel．                       B． A guidebook．

C．A news report．                  D．An advertisement．

高三英语阅读理解中等难度题查看答案及解析

A victim of climate change

A polar bear's dead body found on the Arctic island of Svalbard, the northernmost part of Norway, has shocked experts who say climate change may be to blame for the animal’s death.The starved polar bear in Norway was said to be in good health in April when the Norwegian Polar Institute examined and labeled it． However, the animal was reduced to skin and bones by the time a group of explorers came across its body in July．

The bear is thought to have been heading north in a desperate search for sea ice that would allow it to hunt for seals.

"From his lying position in death the bear appears to simply have starved and died where he dropped," polar bear expert Dr. Ian Stirling, a professor at the University of Alberta said, "He had external suggestion of any remaining fat, having been reduced to little more than skin and bone．"

Stirling believes the bear starved to death as a result of a lack of sea ice which the animals use as a platform for hunting seals． That may also explain why the 16-year-old male bear was found about 155 miles north of where it was seen in April．

Arctic sea ice reached a record low in 2012, according to a report released this week by the National Oceanic and Atmospheric Administration that pointed to continued signs of climate change．

The International Union for Conservation of Nature currently classifies polar bears as vulnerable on its Red List of Threatened Species．

1.How did Stirling know the reason for the death of the polar bear?

A．By the food he ate

B．By doing further experiments

C．By observing other polar bears

D．By his lying position in death

2.The underlined word "vulnerable" probably means _____

A．easily hurt                        B．difficult to hunt

C．dangerous                        D．amazing

3.What is the author's attitude to the incident?

A．Favorable．            B．Uncaring

C．Doubtful．             D．Concerned

4.Where does this text probably come from?

A．A novel．              B．A guidebook

C．A news report．                  D．An advertisement

高三英语阅读理解中等难度题查看答案及解析

A sea of decisions stretches before us and have a larger impact on our lives. We’re attacked with so many decisions that it’s impossible to make a perfect choice every time. However, there are many different ways to make it. 1.

Here’s one 4-step process that may help you solve any number of problems:

1. Formulate your question. 2. This isn’t always as straightforward as it sounds. But, if you approach the situation with a clear view of what you’re actually trying to accomplish, that’ll equip you to sift through this information critically and find what you are looking for. And you can decide whether the new fashion really suits your needs.

2. 3. There’s lots of it out there, so having a clear idea of your question will help you determine what’s relevant. Information gathering helps you weigh different options, choosing a decision that meets your goal.

3. Apply the information—something you do by asking critical questions. For example, in an email that promises you millions, you should consider: ‘What is shaping my approach to this situation?’ ‘4.’

4. Consider the implications. For the promise that seems great at first glance, try to think about the long-term effects and unintended results.

Critical thinking can offer the tools to make a perfect choice. 5. And if enough of us use it, it has the power to make the world more reasonable.

A. Gather your information.

B. Raise some valuable questions.

C. Can you help me with the decisions?

D. Do I assume the sender is telling the truth?

E. Also, it can help us find what we really need.

F. In other words, know what you’re looking for.

G. One particularly effective skill is critical thinking.

高三英语七选五困难题查看答案及解析

Whenever human populations have lived in forest areas, they have always cut down trees which they used for a number of purposes, for housing and ships and served as a source of heating fuel and timber. Growth of cities often meant expansion into forest areas, while even more trees were removed to provide space for agriculture. With the growing demand for paper, vast quantities of trees have also been cut down for paper production. These factors, along with many others, have been contributing to a dangerous phenomenon known as deforestation.

In the last 5,000 years, humans have reduced forest from roughly 50 percent of the earth’s land surface to less than 20 percent. Most of this original, or old growth, forest cover is concentrated in three large areas: the Canadian and Alaskan boreal forest, the boreal forest of Russia, and the tropical forest of the northwestern Amazon Basin and the Guyana Shield. These areas comprise almost 70 percent of the world’s remaining original forest cover. In most places, the rate of deforestation is increasing, with the alarming result of 16 million hectares disappearing worldwide every year.

Loss of forest does not just mean the decline of natural resources. There are several other factors that make deforestation seriously harmful to both the human and natural worlds. One of them is changes in the global climate. For example, forest clearance is releasing substantial volumes of carbon dioxide (CO₂) into the atmosphere as vegetation is burnt or decays. It has been suggested that this is a significant factor in global warming. Moreover, about 10 percent of the world’s tree species are in danger of extinction as a result of deforestation. Deforestation also threatens biological diversity through the destruction of wildlife habitats, which endangers a number of animal species and leads to their potential disappearance. Species are particularly easy to extinction in tropical rainforests because many species have few individuals per unit area, which makes reproduction more difficult. Finally, since forests play an important role in storing water and stabilizing soil, deforestation and the resulting change in land use cause soil erosion (腐蚀) and other forms of land degradation.

1.The passage discusses all of the following EXCEPT the ________.

A. causes of deforestation              B. consequences of deforestation

C. management of deforestation          D. rate of deforestation

2.  The word “diversity” in the last paragraph probably means “________”.

A. variety                              B. expansion

C. development                      D. advantage

3.Why does the author mention fuel and timber in Paragraph 1?

A. To explain the rate of deforestation.

B. To compare them with housing and ships.

C. To show the dangers of deforestation.

D. To illustrate the causes of deforestation.

4.Which of the following sentences summarizes Paragraph 3 best?

A. Deforestation threatens biological diversity.

B. Deforestation has many harmful consequences.

C. Deforestation causes changes in global climate.

D. Deforestation should be stopped.

高三英语阅读理解简单题查看答案及解析