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
A、Because every species becomes extinct. B、Because humans beings are powerful enough to kill other species. C、Because of over-po
A、Because every species becomes extinct. B、Because humans beings are powerful enough to kill other species. C、Because of over-po
admin
2010-01-10
61
问题
W: Professor Marnes, I wonder if you can fill me in on your lecture last Friday. I had to attend a scholarship award ceremony.
M: Oh well, congratulations. I hope you were rewarded handsomely!
W: Well, every bit helps. So, about your lecture, I understand you were talking about extinctions.
M: Yes. Well, the crux of my talk was just that we tend to think of extinction as a dramatic event, but most species die out over quite a period of time.
W: Why do they die off? I thought they were continuously improving themselves. Natural selection, I think you once mentioned.
M: Ah, but you see while there is natural competition between the species, what determines which species survive is largely by chance.
W: I don’t get it. Why do species bother competing?
M: Well, there are short-term advantages. But many species also are helped by others. For example, the common housefly and cockroaches might have died off years ago if not for humans.
W: But you’re not saying that humans are so successful merely because of chance?
M: To a certain extent, humans were initially lucky enough to have the right weather conditions and a lack of predators, but now, of course, we survive by ingenuity!
W: So we may never become extinct.
M: No, because we may be in a crash course to extinction by our continuous exploitation of the environment. We are a relatively young species and our time is not yet overdue.
W: But there are 6 billion of us!
M: Yes and there’re many more houseflies too! Each with the capacity to spread one disease from one person to another in a fast period of time.
选项
A、Because every species becomes extinct.
B、Because humans beings are powerful enough to kill other species.
C、Because of over-population.
D、Because human being is still a young species though it is exploiting the environment.
答案
D
解析
Why is the professor not so sure humans will never become extinct?
选项均以because开头表明,本题可能是针对原因提问。选项B,C、D都与人有关,而A却说的是每一个物种,与其他三项明显不同,故可首先排除。再根据对话中男士(即教授)所说的No,because we may be in a crash…young species and our time is not yet overdue可知,教授认为人类目前对环境的持续开发可能会导致人类的灭绝,但由于人类还是相对年轻的物种,所以可能还不会那么快就面临灭绝的危险,即教授无法确定人类是否永远不会灭绝,由此可知答案为D。
转载请注明原文地址:https://kaotiyun.com/show/wHdK777K
0
大学英语六级
相关试题推荐
Asahumanresourcesmanager,youneedtolistencarefullytothequestionsandconcernsofeveryoneinyourcompany.
说明:假设你是王亮,请用下面提供的信息写一封自荐信。时间:3月12日内容:1.写信原因:在网上看到TotalTrade公司招聘销售经理;2.自我介绍:营销专业大学毕业,擅长与人沟通等;3.自我推荐:简要介绍自己的才能、经验以及对公司的了解;4
Whenyouopenyourelectronicmail,youmayfindinformationabouthowtobuymedicine,cheapairlinetickets,books,computerp
________youhavespecifictrainingtodealwitheverydayemergencies,youshouldneverhesitatetocontactus.
WhowillreplaceJaneJohnsontocontacttheircustomers?___________________.
MissLiu,IamwritingtoinformyouthatIwishtomoveintoanewroomnextterm.Thereasonformydissatisfactionwithmyro
Pollutionhasbecomeaseriousprobleminalmostallthebigcitiesoftheworld.Citypeoplearebecomingmoreandmoreworried
Itdoesn’tcomeasasurprisetoyoutorealizethatitmakesnodifferencewhatyoureadorstudyifyoucan’trememberit.You
Anexerciseprogramdesignedforyoungeradultsmaybeinappropriateforolderpersons,particularlyforpersonsoverage50.Sp
A、Thehouseisexpensive.B、Maybethemanwantstobuyit.C、Thishouseisworthbuying.D、Theladywantstobuyit.C
随机试题
2003年7月,海信、康佳等5家企业发起成立了“闪联”组织,目的是制定“3C”产业标准。这些企业通过成立“闪联”进行合作的战略应属于
三棱药材来源于
下列平喘药物中不属于β肾上腺素受体激动药的是
骨囊肿好发于
体现医患之间契约关系的有下列做法,但不包括
有位营养师对某家庭用称重记账法进行了食物摄取量的调查,他设计了调查表。并入户作了详细的调查。您认为他的做法有无不当之处。[浙江省2011年三级真题]入户的调查步骤:(1)入户。(2)填写家庭食物量登记表中的食物编码。(3)登记购进量。(4)收取调
()认为人的本质是好的,具有发挥自身内在各种潜在能力、追求不断发展的基本倾向。
日本有机蔬菜的认证条件非常苛刻,要求种植有机蔬菜的土地3年以内没有使用过任何农药、化肥。日本有机蔬菜的售价只比普通蔬菜高20%-30%。而在中国,有机蔬菜的价格是普通蔬菜的数倍甚至10倍。这说明,中国的有机蔬菜种植业是暴利行业。以下哪项陈述是上述结论需要假
设三阶方阵A,B满足A2B—A—B=E,其中E为三阶单位矩阵,若A=则|B|=_______.
Intellectistothemind_______sightistothebody.
最新回复
(
0
)