首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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 sur
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 sur
admin
2017-07-14
52
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.
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。根据文章最后一段第二句The group aims to save the bears and their home,可知选择D。
转载请注明原文地址:https://kaotiyun.com/show/9FCO777K
0
成人本科学位英语
相关试题推荐
Givethebooksto______needsthemfortheEnglishclassandthewritingclass.
Evenachildknowsthatnoddingheadmeans"Yes".ButsomepeopleWouldprobably【C1】______whentheyfirstcametoIndia.Whenth
Itusuallytakesmuch(less)timetoflyfromonecountryto(another)than(traveling)(by)train.
(Either)thebrother(or)thesisterwilltell(their)fatherabout(whathashappened).
______theirsuggestions,wewilldiscussthemlater.
Hefindsitdifficultto______himselftotheclimatehere.
ItwasabrightspringafternoonwhenFredatoldmeshewouldn’tneedmeanymore.Ihadjustfinishedmyfour-hourwork【76】upa
Wearelate.Iexpectthefilm______bythetimewegettothecinema.
Weforgottobringourtickets,butpleaseletusenter,______?
我的工作是帮助人们实现他们的梦想。
随机试题
A.脾虚气滞B.寒热互结C.二者均是D.二者均非(2002年第113,114题)半夏泻心汤证的病机是()
在脑复苏中,下列哪项措施是不正确的?
导致交叉配血假阳性的原因不包括
关于人力资源的说法,错误的是()。
2014年7月1日,A公司与其母公司签订合同,A公司以一批自身权益工具和一项作为固定资产核算的厂房作为对价,购买其母公司持有的B公司90%的股权。8月1日A公司定向增发5000万股普通股,每股面值为1元,每股公允价值为10元;支付承销商佣金、手续费50万元
对于一个过份害怕猫的学生,我们可以让他先看猫的照片,谈论猫,再让他远远观看关在笼中的猫,最后让他用手触摸猫,逐步消除对猫的恐惧反应,这种方法在心理治疗中属于()。
催办公文的方式有()。
“商品是天生的平等派”,这表明
要在Access数据库中建立“学生成绩表”,包括字段(学号,平时成绩,期末成绩,总成绩),其中平时成绩为0~20分,期末成绩和总成绩均为0~100分,总成绩为平时成绩+期末成绩×80%。则在创建表时,错误的操作是
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.(56)themmofthecenturywhenjazzwasborn,Americahad
最新回复
(
0
)