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
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.
(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] The word "cubs" in the fourth paragraph is closest in meaning to_____.
选项
A、adults
B、babies
C、hunters
D、enemies
答案
B
解析
词汇解释题。根据第四段最后一句话These conditions can cause polar-bear cubs to become separated from their mothers…说的是被迫与母亲分开,可知是北极熊宝宝。
转载请注明原文地址:https://tihaiku.com/zcyy/3365845.html
相关试题推荐
Theelderlyneedspecialcareinwinter,astheyare______tothesuddenchangeo
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Wemustmake________ourmindswheretogoforourvacationthiswinter.A、outB、u
Wemustmake______ourmindswheretogoforourvacationthiswinter.A、outB、up
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
随机试题
Howlongdoesthistrainingcourselast?[br]Whoarethesponsorsofthiscours
《证券公司风险处置条例》属于()层级的规定。A.法律 B.行政法规 C.部
痰郁互结于咽喉的病证是A.瘿瘤 B.癫证 C.噎膈 D.梅核气 E.脏躁
不影响药物经乳汁分泌的因素为A.药物分子的大小 B.药物的剂型 C.血浆与乳
患者,女,72岁,患肺气肿病10年。近日咳嗽、咳痰、气促、精神差。查体:口唇发绀
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
( )是国家为公民进入教师行业设置的第一道门槛,只有具备法定条件和专业能力,经
分析用控制图主要用于()。 A.分析过程是否处于稳态B.预防产生不合格品
某商业建筑采用性能化设计评估方法,用软件模拟RSET=300s,ASET=450
属于边缘封闭区的是A.上颌牙槽嵴的唇颊侧斜面B.磨牙后垫C.切牙乳突D.腭小凹E
最新回复
(
0
)