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
2025-03-06
6
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 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] 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。从文章最后一段第二句这个组织的目标(aim)是拯救北极熊和它们赖以生存的家园。此题干中出现的mission和原文中的aim是同义转换。故选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3985205.html
相关试题推荐
I(don’tthink)awarmwinteralways(has)anegativeinfluence(on)ourlife,(
今年葡萄和桔子可能供应不足。Grapesandorangesarelikelytobeinshortsupplythiswinter.
(Despite)thetimeof(theyear),thetemperaturewas(enoughhot)to(turnon)
Mostofusareusedtoseasons.Eachyear,springfollowswinter,whichfoll
Mostofusareusedtoseasons.Eachyear,springfollowswinter,whichfoll
Mostofusareusedtoseasons.Eachyear,springfollowswinter,whichfoll
Switzerlandis______aplacetoindulgeinallyourfavoritewintersports;it
Theelderlyneedspecialcareinwinter,astheyare______tothesuddenchangeo
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
Itwasacoldwinterday.AwomandroveuptotheRainbowBridgetollbooth(
随机试题
Basedontheinformationgiven,whichofthefollowingstatementsmustbetrue?
TopicOnComputerGameAddictionForthispart,youareallowed30minutes
简述政府促进就业的宏观经济政策中的财政政策。
A.剪力图、弯矩图都改变 B.剪力图不变,只弯矩图改变 C.弯矩图不变,只剪
下列描述,属于螺内酯不良反应的是A.低血钾 B.高血糖 C.尿崩症 D.女
下列物质中毒具有缺氧和抑制酶的活力双重中毒机制的是A:氰化物 B:汽油 C:
维生素C注射液采用A.火焰灭菌B.干热空气灭菌C.流通蒸汽灭菌D.热压灭菌E.紫
在楼板和结构上打孔或在规定地点以外安装起重滑车或堆放重物等,应事先经过本单位有关
注册监理工程师在执业过程中也要公平,不能损害工程就碍你事任何一方的利益,注册监理
施工索赔同期记录的内容包括()。A.人员设备闲置清单 B.对工期的延误 C
最新回复
(
0
)