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
A、Loss of the forests. B、Loss of its habitat. C、Human’s limitless hunting. D、Limited food resources. B录音提到,对于现存的熊类而言,最大的威胁是它们栖息地
A、Loss of the forests. B、Loss of its habitat. C、Human’s limitless hunting. D、Limited food resources. B录音提到,对于现存的熊类而言,最大的威胁是它们栖息地
admin
2021-11-26
40
问题
Today we continue our series on ecology and conservation with a look at a particularly endangered member of the black bear family. [16] One in ten black bears is actually born with a white coat, which is the result of a special gene that surfaces in a few. Local people have named it "the spirit bear". And according to the legends of these communities, its snowy fur brings with it a special power. Because of this, it has always been highly regarded by local people—[17] so much that they do not speak of seeing it to anyone else. It is their way of protecting it when the strangers visit the area.
The white bear’s habitat is quite interesting. The bear’s strong relationship with the old-growth rainforest is a complex one. The white bear relies on the huge centuries-old trees in the forest in many ways. For example, the old-growth trees have extremely long roots that help prevent erosion of the soil along the banks of the many fish streams. [18] Keeping these banks intact is important because these streams are home to salmon, which are the bear’s main food source. In return, the bear’s feeding habits nurture the forest. As the bears eat salmon, they discard the skin and bone in great amounts on the forest floor, which provide vital nutrients. These produce vegetation that sustains thousands of other types of life forms, from birds to insects and more.
Today, the spirit bear lives off the coast of the province of British Columbia on a few islands. There is great concern for their survival since it is estimated that less than two hundred of these white bears remain. The best way to protect them is to make every effort to preserve the delicate balance of their forest environment—in other words, their ecosystem.
[19] The greatest threat to the bear’s existence is the loss of its habitat. Over many years, logging companies have stripped the land by cutting down a large number of trees. In addition, they have built roads which have fractured the areas where the bear usually feeds, and many resting sites have also been lost The logging of the trees along the streams has damaged the places where the bears fish. To make matters worse, the number of salmon in those streams is declining because there is no legal limit on fishing at the moment.
16. What makes "the spirit bear" look special?
17. What do local people do to protect "the spirit bear" from strangers?
18. Why is keeping banks intact important for bears?
19. What is the biggest threat to the bear?
选项
A、Loss of the forests.
B、Loss of its habitat.
C、Human’s limitless hunting.
D、Limited food resources.
答案
B
解析
录音提到,对于现存的熊类而言,最大的威胁是它们栖息地的减少,故B项“栖息地的减少”为答案。A项“森林的减少”是造成栖息地减少的原因之一。C项“人类的无节制的狩猎”没有在录音中提及。录音提到,人们修路伐木破坏了鲑鱼的生存场所,无节制的捕鱼致使熊类的主食鲑鱼数量减少,但这并不是对现存的熊类的最大威胁,排除D项“有限的食物资源”。
转载请注明原文地址:https://kaotiyun.com/show/1Xx7777K
0
大学英语六级
相关试题推荐
There’recurrently21.5millionstudentsinAmerica,andmanywillbefundingtheircollegeonborrowedmoney.Giventhatthere
A、Itusesupmuchlessenergythanitdoesindeepthinking.B、Itremainsinactivewithoutburningcaloriesnoticeably.C、Itcon
Howmuchproteindoyoureallyneed?A)Themarketingistempting:Getstrongermusclesandhealthierbodieswithminimaleff
IncreasedScreenTimeandWellbeingDeclineinYouthA)Haveyoungpeopleneverhaditsogood?Ordotheyfacemorechalleng
Forthispart,youareallowed30minutestowriteanessayonwhystudentsshouldbeencouragedtodevelopcreativity.Youshou
OrganicagricultureisarelativelyuntappedresourceforfeedingtheEarth’spopulation,especiallyinthefaceofclimatechan
SurfingtheInternetduringclassdoesn’tjuststealfocusfromtheeducator:italsohurtsstudentswho’realreadystruggling
A、Giveapresentation.B、Raisesomequestions.C、Startanewcompany.D、Attendaboardmeeting.A对话开头,女士问男士关于公司重组的报告准备得如何了,男士回答说
"Thedangerousthingaboutlyingispeopledon’tunderstandhowtheactchangesus,"saysDanAriely,behaviouralpsychologista
A、Watersports.B、Racinginrivers.C、Storiesaboutwomenswimmers.D、Booksaboutswimming.D题干问的是最近什么流行起来了。短文中提到,人们常常把生命比作水,这可能
随机试题
在地方的行政体制设置中,首先设置“路”这一管理层次的是()
患儿,7岁,肥胖症,护士向其父母介绍减轻体重的重要手段是
()能支持信息内容的网上发布。
甲公司拥有一项产品发明专利,其权利要求包括a、b、c、d四个特征,其中a、b、c三个特征属于必要技术特征。未经甲公司许可,乙公司制造的下列哪个产品侵犯甲公司的专利权?
如果你拟定了“监狱安全零报告”方案.一位领导认为方案可行。另一位领导却很不满意,你怎么办?
元认知策略包括计划策略、_________和调节策略。
设随机变量X服从正态分布N(μ,σ2),则随σ的增大,概率P{|X一μ|>σ}应该()
MIMD systems can be classified into(150)-oriented systems, high-availability systems and response-oriented systems.The goal of(1
计算机操作系统通常具有的五大功能是()。
A、Mr.Smithwillbereplacedifhemakesanothermistake.B、Mr.SmithisanadmirablechiefoftheAsianDepartment.C、Mr.Smith
最新回复
(
0
)