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
2024-01-18
21
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 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 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 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’ll alter our warming path in time to save them," he says. [br] Which is the best title for the passage?
选项
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
答案
D
解析
主旨大意题。从第一段中提到polar bear开始,之后的每段首句都说到了polar bear,因此,这个词就成为了全文的中心话题。再根据第二段的末句以及第三段的首句,第四段首句,第五段的首句,可以看出,全文讨论的重心是在环境变化给北极熊带来的生存危机。故选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3372552.html
相关试题推荐
Therewasn’tmuchsnowlastwintersopeoplecouldn’tgo______exceptinth
Theelderlyneedspecialcareinwinter,astheyare______tothesuddenchangeo
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Wemustmake______ourmindswheretogoforourvacationthiswinter.A、outB、up
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
Thetopoftheworldisawonderland.Inwinter,thetemperatureoftenfalls
随机试题
Foryears,mentalhealthprofessionalsweretrainedtoseechildrenasmere
监理控制工程进度的措施不包括( )措施。A.组织 B.技术 C.信息管理
现况调查的目的和用途有()A.描述疾病的分布特点 B.早期发现病人 C.
水泥强度等级42.5R中的“R”代表该水泥为( )。A.早强型 B.低热型
A.心 B.肝、肾 C.脾、胃 D.肺 E.筋脉症见发热,咳嗽,咽痛或在
临床药物试验必须符合A.GAP B.GLP C.CMP D.GSP E.
斌斌很调皮,在学校不遵守纪律,经常说脏话,有时候还影响其他同学学习和生活。斌斌的
下列关于黄金的表述,正确的有()。A.黄金具有一定的流动性风险 B.黄金仍然作
在诸多的智力结构理论中,1983年哈佛大学加德纳所提出的是【】A:二因素论
作为期货交易利益的直接承受者,其自身的素质、知识水平、进行期货交易的经验和操作水
最新回复
(
0
)