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
Should we care if over 150 known species of animals have【C1】______from the earth in the last fifty years? Should we be concerned
Should we care if over 150 known species of animals have【C1】______from the earth in the last fifty years? Should we be concerned
admin
2019-01-06
79
问题
Should we care if over 150 known species of animals have【C1】______from the earth in the last fifty years? Should we be concerned that there are【C2】______thousands of species whose very existence is【C3】______endangered—largely because of our activities?【C4】______, after all, is the natural end of populations. Species are born, then【C5】______, and then die. Some live a【C6】______time, perhaps millions of years; some die more quickly. We have【C7】______the extinction of many species we know about, and we have undoubtedly sealed the【C8】______of others. In fact, there are undoubtedly many other species that have lived among us during our time on earth, but that have disappeared as a(n)【C9】______of our activities without our ever having known they existed.
It is hard to explain the rationale of many of us who are concerned about such matters. I have never seen a sea whale,【C10】______I don’t want them to become extinct. Moreover, I felt this way long before I understood anything about how they might be an important part of an ecosystem. Possibly such feelings merely reflect the cultural attitude that it is ""nice"" to wish other living things well; thus, the attitude is【C11】______.I feel nice.
There are, of course, more rational reasons for【C12】______the extermination of any species. For one thing, the kind of attitude that encourages or sanctions the destruction of other species is a threat【C13】______our own wellbeing. If such an attitude exists, we ourselves might【C14】______victim to it. Living things(including us)might be expected to fare better where there is【C15】______for life. The extinction of other species could also threaten us【C16】______by simplifying the system of which we are a part or by destroying parts of the ecosystem【C17】______which we directly rely. For example, if we continue to poison the oceans【C18】______we are willing to believe only a few bottom dwellers are affected, we might【C19】______overstep some critical threshold and trigger the wholesale death of plankton, thus finding ourselves without a major【C20】______of the world’s food and with our oxygen supplies dwindling."
【C20】
选项
A、source
B、maker
C、creator
D、resources
答案
A
解析
source of the world’s food意为“世界食物的来源”。
转载请注明原文地址:https://kaotiyun.com/show/C8UO777K
0
考博英语
相关试题推荐
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocomeinblindingflashesorastheresultofdramatica
TheInternetcanmakethenewsmoredemocratic,givingthepublicachancetoaskquestionsandseekoutfactsbehindstoriesan
Bycuttingdowntreeswe______thenaturalhomeofbirdsandanimals.
______thatshouldbegivenpriorityto.
Scientistshopethecollisionwillproducealargecraterinthecomet’ssurfaceinordertorevealthecoreandgivesome______
Scientistsnowtendtoagreethatthenoiselevelforpotentialhearinglossbeginsatabout70decibels.Someofthemarevery
Between1833and1837,thepublishersofa"pennypress"provedthatalow-pricedpaper,editedtointerestordinarypeople,cou
CapitalAinflowswillalsoBtendtoincreasetheinternationalvalueofthedollar,CmakeitmoredifficulttosellU.S.Dexpor
TheInternet,E-commerceandglobalizationaremakinganeweconomicerapossible.Inthefuture,capitalistmarketswilllargel
Theoldmusiciandecidedtomovetohercountryhome______heradvancedageandpoorhealth.
随机试题
关于新生儿头颅血肿,应选择下列哪项护理措施()
A.首乌藤B.柏子仁C.酸枣仁D.合欢皮E.远志既能养心安神,又能敛汗生津的药物是
若某商品价格上升2%,其需求量下降10%,则该商品需求价格弹性是()。
明确界定了我国银行业监督管理的目标、原则和职责的法律是()。
“通过前几次的小组活动,我们大家都达成了共识:尽管父母的教育方式可能不当,但他们始终是爱我们的,他们是我们最信任的人。大家也都认为,一时冲动,向自己父母说狠话、重话是不对的。那么今天,我们就要想想办法,如何克制自己的冲动,改善与父母的沟通”。社会工作者的这
企业经营环境的微观分析包括()。
给定资料1.环境是人类生存和发展的基本前提。环境为我们生存和发展提供了必需的资源和条件。随着社会经济的发展,环境问题已经作为一个不可回避的重要问题被提上了各国政府的议事日程。保护环境,减轻环境污染,遏制生态恶化趋势,成为政府社会管理的重要任务。保
阅读材料,回答问题:在读书、学习、讨论中,深化对党的创新理论的理解;在调研、走访、座谈中,发现和改正工作中存在的问题……“不忘初心、牢记使命”主题教育正在全党上下展开。新中国成立70周年之际,我们党全国执政70周年之际,一场“正当其时”的主题教育,让党员
中国共产党实事求是思想路线的形成和确立经历了一个过程。毛泽东初步界定中国共产党人的思想路线的基本含义的著作是
BrentMadoostillremembersthequestionthatgothimintocollege.HewasinaworkshopwitheightotherNewYorkCitystudents
最新回复
(
0
)