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
2024-03-10
19
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—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. 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.
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、Because salmon live in the streams near the banks.
B、Because the banks help prevent erosion of the soil.
C、Because the banks can help nurture the forest.
D、Because the banks can feed abundant vegetation.
答案
A
解析
录音提到,保持河岸完整之所以重要是因为白熊的主食鲑鱼正是生活在溪里(home to salmon),A项的live in是对原词home to的同义转述,故选A项。B项“河岸有助于防止土壤被侵蚀”错误,这是老树的长树根的作用。录音提到白熊的摄食行为能反哺森林,C项“河岸能养育森林”与录音内容不符。D项“河岸能给大量植被供养”错误,实际上是白熊吃完鲑鱼后的骨头为植被提供丰富的营养。
转载请注明原文地址:https://tihaiku.com/zcyy/3521356.html
相关试题推荐
[originaltext]W:Now,couldyoutellmewheretheideaforthebusinessfirstc
[originaltext]W:Now,couldyoutellmewheretheideaforthebusinessfirstc
[originaltext]W:Now,couldyoutellmewheretheideaforthebusinessfirstc
[originaltext]W:Thisweek’sprogramUpYourStreettakesyoutoHarrogate,as
[originaltext]W:Thisweek’sprogramUpYourStreettakesyoutoHarrogate,as
[originaltext]W:Thisweek’sprogramUpYourStreettakesyoutoHarrogate,as
[originaltext]AsophomoreatColoradoStateUniversityfirsthadaproblem
[originaltext]AsophomoreatColoradoStateUniversityfirsthadaproblem
[originaltext]YoucouldsaythatJosephCornellbecameanartistbecauseof
[originaltext]YoucouldsaythatJosephCornellbecameanartistbecauseof
随机试题
Itwasnotsolongagothatparentsdroveateenagertocampus,saidatearf
[originaltext]M:Ireallydon’tknowwhattodotiffssummer.Ican’taffordto
十二经脉的功能活动反映于体表的部位是()A.孙络 B.别络 C.皮部
发生导致患者死亡的重大医疗事故时,要求医疗机构应当在多长时间内向所在地卫生行政部
Theoutcomeoftheelectionwasstillin
下列选项哪个能与题干立体图形①、②、③组合成3×3×3的立方体图形? A.如上
2020年国内游客28.8亿人次,比上年下降52.1%。其中,城镇居民游客20.
某消防技术服务机构对已完工的防烟排烟系统进行检查,下列有关排烟防火阀设置位置的检
甲公司财务部门负责人李某努力学习会计理论知识,精心设计会计业务核算流程,并对相关
根据《环境影响评价技术导则—地面水环境》,在筛选水质预测参数时,可不考虑的因素是
最新回复
(
0
)