首页
登录
职称英语
The top of the world is a wonderland. In winter, the temperature often falls
The top of the world is a wonderland. In winter, the temperature often falls
游客
2024-01-15
17
管理
问题
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.
(78)
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 world’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.(79)
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(大片浮冰), and they can’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 cf Polar Bears International. The group aims to save the bears and their home. "The more people who see polar bears and understand their difficult situation, the better the chance we’ll alter our warming path in time to save them," he says. [br] What’s the mission of Polar Bears International?
选项
A、Saving energy.
B、Conducting scientific research.
C、Seeking international cooperation.
D、Saving polar bears and their home.
答案
D
解析
细节题。根据文章最后一段第二句The group aims to save the bears andmeir home.可知选择C。
转载请注明原文地址:https://tihaiku.com/zcyy/3365847.html
相关试题推荐
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Wemustmake________ourmindswheretogoforourvacationthiswinter.A、outB、u
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Itwas______winternightandapalemoonhunglowin______sky.A、a:aB、the:the
随机试题
Ridingmybicyclehomefromschool,______asIwentaroundthecorner.A、acarhit
FiresthroughtheIndonesiancountrysideareduetoanaturalphenomenon.[origi
[originaltext]M:HaveyouheardthatPeter’svacationplanswentupinsmokewh
按甲类管理的乙类传染病是( )。A.艾滋病 B.流行性斑疹伤寒 C.肺炭疽
施工组织设计在实施过程中,施工单位如需做较大的变更,应经()审查同意。 A
护士对初次进行青霉素注射的患者进行用药宣教,希望患者不要擅自停药,如果停药超过一
急性化脓性腹膜炎最主要的症状是A.发热 B.腹痛 C.腹胀 D.压痛、肌紧
慢性主动脉瓣关闭不全的体征包括 A.DeMusset征阳性B.Trau
企业计提的医疗保险属于企业设定提存计划的内容。( )
(2017年真题)职务特征模型(JCM)中,决定工作职务意义重要程度的维度有(
最新回复
(
0
)