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
Visiting a National Park can be relaxing, inspiring, but it can also be disturbing. As you drive into Rocky Mountain National Pa
Visiting a National Park can be relaxing, inspiring, but it can also be disturbing. As you drive into Rocky Mountain National Pa
admin
2013-01-29
70
问题
Visiting a National Park can be relaxing, inspiring, but it can also be disturbing. As you drive into Rocky Mountain National Park, and you will see starving elk, damaged meadows and dying forests. Our parks are growing old because we have mistakenly protected them from natural processes, such as fire, predation, and insects. We believed that we were saving these remnants of wild America, but actually we have "protected" them to death. If we want to save our National Parks, the National Park Service must change its management priorities to prevent over population of animals and to restore natural process in the forest in order to prevent their stagnation and "death" by old age. We must act soon: our parks are dying of old age because we have altered the forces in nature that keep them young and strong.
By tracing the history of our National Parks, we can understand the problem and see why we need active management. In the early part of the 20th century, settlers exploited wildlife heavily, resulting in neat-extinction of many species. Therefore, several National Parks were established by Congress primarily to save endangered animals. However, stricter wildlife protection laws and improved wildlife management techniques resulted in greater populations of animals overcrowding in areas of high concentration, such as the Yellowstone elk herds. Complicating the problem, the National Park Service in the early part of the 20th century adopted a policy of aggressive predator elimination, thus reducing natural wildlife population control. Subsequently, elk and deer populations exploded in many National Parks, resulting in severe damage to native vegetation. Vigorous forest fire and insect suppression in the National Parks through out the 20th century further altered the natural environment by allowing forests t6 over-mature, without natural thinning processes. Park managers thought that they were protecting the land, but actually they were removing important controls from the forest ecosystems.
Clearly, we must act immediately if we want to pass down to our children and grandchildren the green legacy of our National Parks: we must step in and restore the natural processes which we have altered through our well-intentioned, but misguided, policies in the past.
According to the author, there would not be starving elks, damaged meadows or dying forests in National Parks if ______.
选项
A、the government introduced stricter wildlife laws
B、the National Park Service employed more wildlife management techniques
C、the natural processes were restored
D、we continued to improve our natural environment
答案
C
解析
文章讲的就是应该恢复自然进程而不是用严格的保护法令或野生动物保护的技术。
转载请注明原文地址:https://www.kaotiyun.com/show/101O777K
0
考博英语
相关试题推荐
Opponentsofaffirmativeactionsaythebattleovertheuseofraceincollegeadmissionsishardlyover,despitetheSupremeCo
Thecommittee’sreportisbecauseitnotasvaluableasitmighthavebeenaddressesonlythesymptomsandnotthe______causes
WithoutwaterfromtheNileRiver,Egypt________afanningcountryandbecomeadesert.
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
Onceyougettoknowyourmistakes,youshould______themassoonaspossible.
APolishproverbclaimsthatfish,totasteright,shouldswimthreetimes—inwater,inbutterandinwine.Theearlyeffortsof
Hewasconcernedonlywithmundanematters,especiallythedailystockmarketquotations.
Globalizationisaphenomenonandarevolution.Itissweepingtheworldwithincreasingspeedandchangingthegloballandscape
"Forallyouknow,Imighthaveatremendousburningtalent,"warnstheheroineofBriefEncounter,asthecamerapansontoas
Hadtheexplosionbrokenout,thepassengersintheplaneshouldhavebeenkilled,foritwas______timedwiththeplane’stake
随机试题
关节镜的直径范围为
将对象从背景中划分出来的知觉特性是()。
胃排空
肺心病患者,咳喘加重1周,昏迷1天,应首先考虑肺心病患者,活动后气促,偶尔出现下肢轻微水肿
A.丙戊酸钠B.卡马西平C.乙琥胺D.苯妥英钠E.ACTH特发性失神发作首选
由于流水线的特性决定,企业内部物流作业必须服从和服务于生产工艺流程的需要,所以厂内物流具有很强的()。
人体内含量小于0.01%的矿物质称()。
每次看到“月晕”就要“刮风”,地砖“潮湿”就要“下雨”,最后得出“月晕而风”“础润而雨”的结论。说明了思维的()
大面
Everynovelinvitesustoenteraworldthatisinitiallystrange;ourgradualandselectiveorientationtoitsmanners(i)_____
最新回复
(
0
)