首页
登录
职称英语
[originaltext] Today we continue our series on ecology and conservation with
[originaltext] Today we continue our series on ecology and conservation with
游客
2024-03-08
31
管理
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://tihaiku.com/zcyy/3515717.html
相关试题推荐
[originaltext]Thereisacommonopinionthatifyoustudyhardandgraduate
[originaltext]Thereisacommonopinionthatifyoustudyhardandgraduate
[originaltext]Thereisacommonopinionthatifyoustudyhardandgraduate
[originaltext]Thereisacommonopinionthatifyoustudyhardandgraduate
[originaltext]Engaginginregularexerciseimprovesyouroverallhealth,mobili
[originaltext]Today,wewillfocusonsolotravelling.Whileit’sfuntotravel
[originaltext]Today,wewillfocusonsolotravelling.Whileit’sfuntotravel
[originaltext]Today,wewillfocusonsolotravelling.Whileit’sfuntotravel
[originaltext]Somepeoplechoosetotightlygraspthepastandstaystuckinth
[originaltext]Withexams,quizzes,essays,projects,andmyriaddeadlinesfo
随机试题
患者男。56岁。肝硬化病史12年,一周前因症状加重入院,诊断为肝性疾病,医嘱给予
按照建设工程项目不同参与方的工作性质和组织特征划分的项目管理类型,施工方的项目管
仪器仪表及工器具借用应按照规定,履行必要的()手续。登记$;$借用$;$备案$;
2012年单项选择:中学阶段开设的语文、数学、物理、化学课程,属于() A、学
1.关于人的身心发展有哪些典型观点?其代表人物是谁?基本观点是什么? 2.
古代动物中有一类动物叫蜥螈,它具有两栖动物的特征,具有爬行动物的特征。古
关于固定桥固位体类型的描述,错误的是A.固位体包括冠外固位体、冠内固位体和根内固
某生物制药公司年销售净额280万元。息税前利润80万元,固定成本32万元,变动成
(2020年真题)甲公司以人民币为记账本位币,下列各项关于甲公司外币折算会计处理
工程项目不同于一般项目的特点是()。A.工程项目交易的复杂性
最新回复
(
0
)