题目内容
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[单选题]
5. The polar bear feeds almost exclusively on seals and other animals, but it may also __________ on vegetation.
A.eat
B.graze
C.gulp
D.take
提问人：网友luomeifang
发布时间：2022-01-07
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A.Bald Eagle
B.Beaver
C.Polar Bear
D.Kangaroo
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更多“5. The polar bear feeds almost…”相关的问题
第2题
The polar bear got nearer to the seal by ______.A．sliding over the ice sheetB．tiptoeing on
The polar bear got nearer to the seal by ______.
A．sliding over the ice sheet
B．tiptoeing on the ice sheet
C．swimming under the ice sheet
D．crawling from behind the seal
第3题
Many scientists hold that global warming can be controlled by.A．reducing the polar bear po
Many scientists hold that global warming can be controlled by.
A．reducing the polar bear population.
B．paying more attention to the earth's rising temperatures
C．reducing carbon dioxide emissions
D．refreezing the polar ice caps
第4题
Bob climbed an ice pinnacle ______.A．to look for his companionB．to look for sealC．to look
Bob climbed an ice pinnacle ______.
A．to look for his companion
B．to look for seal
C．to look for a polar bear
D．to see the beautiful scene
第5题
What will be the result of global warming to the Antarctic （南极) ecosystem？
A、keystone species will be largely impacted and lose it ecological niche.
B、Number of polar bear will decline.
C、The sea ice coverage is not changing too much.
D、The primary producer will change to bacteria.
第6题
Which of the following is chosen by Siegel as the symbolic animal？A．The murrelet nesting i
Which of the following is chosen by Siegel as the symbolic animal？
A．The murrelet nesting in glaciers.
B．The polar bear in the North Pole.
C．The spider in Alaska's Glacier Bay.
D．Staghorn corals in the Caribbean.
第7题
阅读材料，回答题。The top of the world is a wonderland. In winter, the temperature often fai
阅读材料，回答题。
The top of the world is a wonderland. In winter, the temperature often fails to -30~F and the sun never rises. The ocean is surrounded by frozen ground. There are few people or trees, but to polar bears, the Arctic(北极) is home.
Polar bears have thick fur, big paws and other features that make them well prepared for life in their tough environment. In fact, they need the Arctic sea ice for survival. But climate change is causing larger and larger areas of summer sea ice to melt(融化). Experts say that if warming pat-terns continue, the Arctic could be free of summer sea ice by 2050. That may cause two-thirds of the word&39; s 20,000 polar bears to be gone by then too.
Polar bears can&39; t survive for long on land. Seals are their main source of food. The only place where polar bears can hunt seals is on the ice. Although these bears are strong swimmers, they are no match for lighming swift seals in the water. A polar bear has brilliantly clever strategies to overcome this disadvantage. In winter the bear waits motionless beside a seal&39; s breathing hole, which is a narrow tunnel through the ice. Often many hours pass before the seal comes up for air and the bear kills it with a powerful blow of its paw. In summer, the polar bears that live on land eat very little and wait for the sea ice to return.
With the sea ice forming later in the year and melting earlier, polar bears do not have enough opportunity to hunt and eat. Less sea ice makes it harder for the bears to catch the seals. The bears must swim longer distances between ice packs(大片浮冰), and they can&39; t always make it.. The ice is also getting thinner. These conditions can cause polar-bear cubs to become separated :from their mothers, who provide them with food.
Steven Amstrup is the chief scientist of Polar Bear International. The group aims to save the bears and their home. "The more people who see polar bears and understand their difficult situations, the better the chance we&39; 11 alter our warming path in time to save them," he says.
Which is the best title for the passage？ 查看材料
A.Climate Change in the Arctic
B.How to Protect the Environment
C.The Arctic Is Home to Polar Bears
D.Polar Bears in Danger
第8题
The top of the world is a wonderland. In winter, the temperature often falls to -30°F and
the sun never rises. The ocean is surrounded by frozen ground. There are few people or trees, but to polar bears, the Arctic(北极)is home. Polar bears have thick fur, big paws and other features that make them well prepared for life in their tough environment. In fact, they need the Arctic sea ice for survival. But climate change is causing larger and larger areas of summer sea ice to melt(融化). Experts say that if warming patterns continue, the Arctic could be free of summer sea ice by 2050. That may cause two-thirds of the word s 20,000 polar bears to be gone by then too. Polar bears can t survive for long on land. Seals are their main source of food. The only place where polar bears can hunt seals is on the ice. Although these bears are strong swimmers, they are no match for lightning swift seals in the water. A polar bear has brilliantly clever strategies to overcome this disadvantage. In winter the bear waits motionless beside a seal s breathing hole, which is a narrow tunnel through the ice. Often many hours pass before the seal comes up for air and the bear kills it with a powerful blow of its paw. In summer, the polar bears that live on land eat very little and wait for the sea ice to return. With the sea ice forming later in the year and melting earlier, polar bears do not have enough opportunity to hunt and eat. Less sea ice makes it harder for the bears to catch the seals. The bears must swim longer distances between ice packs(大片浮水), and they cant always make it. The ice is also getting thinner. These conditions can cause polar-bear cubs to become separated from their mothers, who provide them with food. Steven Amstrup is the chief scientist of Polar Bear International. The group aims to save the bears and their home. " The more people who see polar bears and understand their difficult situations, the better the chance well alter our warming path in time to save them," he says.
点击查看答案
Which is the best title for the passage？
A．Climate Change in the Arctic
B．How to Protect the Environment
C．The Arctic Is Home to Polar Bears
D．Polar Bears in Danger
第9题
It CANNOT be inferred from the passage that______.A．the department knows little respecting
It CANNOT be inferred from the passage that______.
A．the department knows little respecting the science of global warming
B．the department is in the passive position in some cases
C．some social groups play significant roles in protecting environment
D．the department is reluctant to link heat-trapping gases with declining polar bear
第10题
听力原文： "We need plenty more seals", Oolak said as they parted. He added, "But you don't
shoot seal in water now for they are hard to get".
点击查看答案
Two hours passed, during which Bob had heard Oolak's rifle crack four or five times. Bob decided to look for his companion and rejoin him. He climbed an ice pinnacle to look. It was a peaceful scene that met Bob's gaze. White ice stretched before him with little streams flowing across its surface. The low hills and open plains of ice were all bathed in golden sunlight. He did not see Oolak, but he became aware that the dogs had been howling for some time. It dawned on him that the entire team was in an uproar.
When he glanced his way to see what the trouble was, his heart almost froze. Walking toward them was an immense whitish form, sleek head hanging low--a polar bear!
The bear smelled a freshly-killed seal which Oolak had dragged to the sled, and it was this that he was seeking. To the clamor of the dogs he paid no more attention than if it were the buzzing of a fly. In his entire life the huge beast had never known fear, for the. polar bear is the ruler of the ice. He knows no enemies.
According to the passage, it is not easy to get seal
A．in water.
B．on the ice.
C．in the polar region.
D．on the pinnacle.
