首页
登录
职称英语
[originaltext] In Spring 2008, the polar bear was placed on the endangered s
[originaltext] In Spring 2008, the polar bear was placed on the endangered s
游客
2024-05-20
42
管理
问题
In Spring 2008, the polar bear was placed on the endangered species list. According to the Endangered Species Act, an endangered species is an animal that is likely to face extinction in its natural habitat. Polar bears have been categorized as a "threatened" species. The ESA defines a threatened species as one that is likely to become "endangered" in the foreseeable future. The polar bear is the first animal that has been classified as endangered due primarily to global warming. Global warming is caused by carbon dioxide and other greenhouse gases that become trapped in the atmosphere. Heating homes, driving cars, and burning garbage all require fossil fuels that lead to global warming. The polar bear’s habitat is more vulnerable to global warming than many other species. Polar bears live mainly on the sea ice in the Arctic. This is where they hunt for fish and build up fat reserves. When the ice melts many polar bears move to land and live off their stored fat. In the Arctic, global warming is causing the ice to melt slightly earlier and form slightly later. This results in a shorter feeding season for the polar bear. Some risk their lives to find ice. If they have to swim too far they will drown from exhaustion and hunger. The World Wildlife Fund estimates that nearly 25% of the Arctic sea ice has disappeared in the past 30 years. Since the Endangered Species Act was introduced in the U.S. in 1973, many species have been taken off the list due to increased populations.
Questions 29 to 31 are based on the passage you have just heard.
29. What is an endangered species, according to the passage?
30. What poses the greatest threat to polar bears today?
31. What percentage of the Arctic sea ice has disappeared in the past 30 years?
选项
A、One that is already extinct in some parts of the world.
B、One that is extremely dangerous to humans.
C、One that faces threats from humans in its natural surroundings.
D、One that is likely to extinct in its natural home.
答案
D
解析
选项中的One that is…extinct/…dangerous,naturally die out等表明,本题与某一类动物有关。短文开头提到,根据《濒危物种法案》,濒危物种是指很可能在其自然栖息地灭绝的一种动物,由此可知,答案为[D]。
转载请注明原文地址:http://tihaiku.com/zcyy/3602749.html
相关试题推荐
[originaltext]OK,soinourlastclasswewerediscussingbigbandsswing
[originaltext]OK,soinourlastclasswewerediscussingbigbandsswing
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]M:Mary,wouldyouliketobemycooperationpartnernexttime?W
[originaltext]Isitpossibletopersuademankindtolivewithoutwar?War
[originaltext]Isitpossibletopersuademankindtolivewithoutwar?War
随机试题
Obesity,aGrowingProblemintheUSWhenitcomestofood,Americaisnot
[originaltext]Allbigcitiesarequitesimilar.LivinginamodemAsiancit
TheSuperBowlisoneofthebiggesteventsontheadvertisingcalendar,as
在建筑工程设计的主要文件(图纸)中,须由主持该项目设计的注册建筑师签字并加盖其执
供暖管道保温材料应采用非燃烧材料的是()。A.高层工业建筑 B.低层工业建
12岁男性患儿以发热为主诉来院,既往确诊为轻度心瓣膜病。一个月前拔牙,两周前开始
负责证券投资者保护基金筹集、管理和使用的是()。 A.社保基金理事会 B.
()通常被视为一种综合性风险。A.信用风险 B.市场风险 C.操作风险
下列不属于准公共物品的是()。A.教育 B.医疗卫生 C.治安 D.收费
根据《绿色施工导则》,关于非传统水源利用的说法,错误的是()。A.现场机具
最新回复
(
0
)