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
2025-03-05
18
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/3983214.html
相关试题推荐
Itwas______winternightandapalemoonhunglowin______sky.A、a:aB、the:the
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Inwinterwego______onthehill.A、skiingB、toskiC、skiD、forskiA本题考查动词go的固定搭
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
随机试题
Let’sNotHideHealthCostsWeareawashinhealth-careproposals.Presi
AskmostpeoplehowtheydefinetheAmericanDreamandchancesarethey’lls
占地面积大于1000m2的木器厂房应设置自动灭火系统()
下列各项中,不属于筹资管理的原则的是( )。A.筹措合法 B.规模适当 C.
患者喘证20年,现症见喘促短气,气怯声低,喉有鼾声,咳声低弱,痰吐稀薄,自汗畏风
惊厥发作期患儿的首优护理问题是A.恐惧 B.有受伤的危险 C.有窒息的危险
男童,8岁,1天前突发“感冒”,伴寒战,体温39.5℃,同时右大腿下端疼痛、红肿
根据下列描述,可推断出该革命圣地是()。①党中央在此指挥了决定解放战争走向
设立公司须向设区的市级以上工商行政管理部门申请名称预先核准。()
甲硫氨酸密码子 A.AUG B.GUA C.UAA、UGA、UAG
最新回复
(
0
)