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
2024-01-16
60
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.
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. 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 of 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] According to the passage, which of the following statements is TRUE?
选项
A、Starving polar bears are increasingly coming into villages, where they may be killed either for food or safety.
B、Polar bears can spend their entire lives on land if the sea ice melts completely.
C、Two-thirds of the world’s polar bears may disappear by 2050 as global warming continues.
D、The growing distance between ice packs is not a problem for polar bears, because they are excellent swimmers.
答案
C
解析
根据文章第二段最后两句:专家说如果温室效应持续下去,到2050年北极将没 有夏季海冰.那也将导致世界上2万只北极熊中的2/3死亡。可知选择C。
转载请注明原文地址:https://tihaiku.com/zcyy/3368652.html
相关试题推荐
Wemustmake________ourmindswheretogoforourvacationthiswinter.A、outB、u
Wemustmake______ourmindswheretogoforourvacationthiswinter.A、outB、up
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Itwas______winternightandapalemoonhunglowin______sky.A、a:aB、the:the
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
随机试题
Readtheinformationaboutthecommunicationofinformationinbusiness.Choose
OnDialectalTVProgramsThereismuchdiscussionto
In1993,womenheld46percentofthepayingjobsintheUnitedStates.[br]In
[originaltext]W:Thankyou,thankyouandwelcometoeveryone’sfavoritegames
当旅游车到达机场(车站、码头)后,地陪应做好的工作有()等。A.协助旅游者下车
阿托品抗休克作用的机制是A.收缩血管,增加外周阻力 B.扩张血管,改善微循环
Thechangeinthatvillagewasmiraculou
我国加强和创新社会管理的总要求有()。 A.最大限度激发社会创造活力B.最大
在建筑工程保险合同中,可能被约定为特种风险而载明赔偿限额的是()。 A.地震、
在非上市公司股权激励中,业绩股份来源主要包括()A.从二级市场购买股票 B
最新回复
(
0
)