首页
登录
职称英语
Rescue workers had collected 820 birds from the Gulf of Mexico oil spill, th
Rescue workers had collected 820 birds from the Gulf of Mexico oil spill, th
游客
2023-08-05
46
管理
问题
Rescue workers had collected 820 birds from the Gulf of Mexico oil spill, the majority of them already dead. The current spill promises to be the largest in US history, and as cleanup efforts stretch across the summer, it’s clear that more oiled birds will be found, stuck and suffering in the black sticky liquid. And as they do with every oil spill, rescue workers will go to great lengths to capture and clean the survivors hoping to restore them to their natural habitat.
Is it worth the effort? Some scientists aren’t so sure. Because the stress of being captured and bathed is as significant as the horror of being immersed in oil, and because research suggests that many rescued birds die shortly after being released, some experts say euthanasia (安乐死) is a more humane option.
Clean bird feathers repel water and regulate body temperature—dirty ones don’t. Oil in particular makes feathers heavier and diminishes their ability to trap air, which in turn makes birds more vulnerable to drowning, overheating and organ damage. Of course, being captured and cleaned is no picnic either. Some birds wind up returning to their destroyed habitats only to fall victim to the oil again. And those who manage to avoid a second oil bath suffer dramatically shortened life spans and lower reproductive success. Of the thousands of birds that were rescued from the Prestige oil spill off the coast of Spain in 2002, only 600 were released into the wild; most of the rest died after just a few days in captivity.
However, bird rescuers say they have learned a lot about how to best help oil-soaked birds, and that therefore, survival rates stand to increase this time around. In the past, birds were cleaned right away, and volunteers often worked through the night bathing rescued birds. But now, captured birds are left to rest for a day or two before being cleaned, and only washed during the day, so as not to disrupt their circadian (生理的) rhythms. But part of that increase may be due to greater selectivity on the part of rescuers. The workers do blood tests right in the field now and birds that are loaded with hydrocarbons (碳氢化合物) or don’t look like they’re going to make it are put down right away, rather than subjected to the stress of captivity and cleaning.
And so far, while release rates may be improving, there is little evidence of better medium or long-term survival, especially for the more-difficult-to-save species. There still aren’t good biomedical protocols (协议) for repairing the internal organ damage. Nevertheless, rescue efforts will continue, in large part because the public demands that. Euthanasia is a difficult thing to do, especially for people who have built their lives around saving animals. [br] Why do the survival rates of oiled birds increase?
选项
A、Oiled birds are kept in warm water for one or two days.
B、The second cleaning of the oiled birds in daytime is not permitted.
C、The rescuers often select the birds that are likely to survive.
D、Hydrocarbons are removed to rescue the oiled birds.
答案
C
解析
根据题干中的survival rates和increase定位到原文第四段最后两句。细节辨认题。定位句指出,存活率上升的一部分原因在于救援者的选择性更强了,通过验血,他们确定哪些鸟能被救活,而不能被救活的鸟会马上被扔掉。因此,C)“救援者通常会选择生存可能性较大的鸟”符合题意,为本题答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2898927.html
相关试题推荐
A、Workers’longworkinghours.B、Workers’poorworkingconditions.C、Thelowrat
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
Rescueworkershadcollected820birdsfromtheGulfofMexicooilspill,th
Rescueworkershadcollected820birdsfromtheGulfofMexicooilspill,th
Likemanyworkers,IvelisseRivera,aphysicianatCommunityHealthCenter,
随机试题
FiveGoldenRulesforGivingAcademicPresentationsAcademicpresentationsared
Musicistheresultofthoughtintheformofattitude.Thereisnooneway
[originaltext]W:So,you’reanarchitect?M:Yes.W:Doyouworkforapublico
管理者把信息传递给单位或组织以外的个人,让相关者(股东、消费者、政府等)了解感到
募集资金直接投资于固定资产项目的,发行人根据重要性原则披露以下()内
或有事项准则规定的必须在会计报表附注中披露的或有负债包括()。 Ⅰ.已
患者,女性,46岁,因怀疑上消化道出血入院,需做粪便隐血试验。护士向其介绍试验前
某省政府公布的政府采购限额标准为30万元,货物公开招标限额标准为100万元。该省
关于腱反射,下列哪几项不正确?( )A.是位相性牵张反射 B.指缓慢持续牵拉
某建筑公司2008年年末有关资产、负债和所有者权益资料见下表。 单位:万元
最新回复
(
0
)