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、Why species don’t avoid extinction by adapting. B、Why species become extinct at the rate they do. C、Why humans aren’t extinct.
A、Why species don’t avoid extinction by adapting. B、Why species become extinct at the rate they do. C、Why humans aren’t extinct.
admin
2013-09-26
55
问题
W: Professor Marnes,(19)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 vital part 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: (20)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 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: (21)To a certain extent, humans were initially lucky enough to have the right weather conditions and a lack of killers who live on us for food, but now, of course, we survive by cleverness.
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 hot 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.
19. Why did the woman go to see the professor?
20. What puzzles the woman about extinction?
21. What does the man say about humans’ successful survival?
选项
A、Why species don’t avoid extinction by adapting.
B、Why species become extinct at the rate they do.
C、Why humans aren’t extinct.
D、How many species aren’t extinct.
答案
A
解析
在对话的中间部分,女士对物种为什么会灭绝提出疑问,因为她认为物种是一直在不断地进化的,故答案为A)。
转载请注明原文地址:https://kaotiyun.com/show/Vn27777K
0
大学英语六级
相关试题推荐
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______tomostAmericans.Thereisalotofspecialization,a
Nowadays,incominggenerationsreallyrelynowonthepowerofthe"Internet"whenitcomestosearchingforinformation.Justt
Nowadays,incominggenerationsreallyrelynowonthepowerofthe"Internet"whenitcomestosearchingforinformation.Justt
Nowadays,incominggenerationsreallyrelynowonthepowerofthe"Internet"whenitcomestosearchingforinformation.Justt
Nowadays,incominggenerationsreallyrelynowonthepowerofthe"Internet"whenitcomestosearchingforinformation.Justt
BaseballwasinventedinNewYorkCityin1845.Although【C1】______gamesexisted,itwasAlexanderCartwright,anearlybaseball
BaseballwasinventedinNewYorkCityin1845.Although【C1】______gamesexisted,itwasAlexanderCartwright,anearlybaseball
A、ChildreninCaliforniaarenotlikelytolearncreativegeography.B、ChildreninprivateschoolsrunbyJapanesearesmarter.
A、Refinetheirinterviewingtechniques.B、Arrangetheirworkingschedules.C、Selectappropriatepracticalcourses.D、Writecover
Competitionforadmissiontothecountry’stopprivateschoolshasalwaysbeentough,butthisyearElisabethKrentsrealizedit
随机试题
商代直接派官员组织被征服者的种族奴隶从事生产的区域被称为()
雌、孕激素的协同作用表现在()
急腹症诊断不明时,应慎用
在通风管道制作安装中,对圆形镀锌钢板通风管,根据工程量计价规范规定,其安装工程量的计量单位为( )。
循环农业是美丽乡村建设的途径之一。下图示意采用循环农业模式,读图回答问题。循环农业对建设美丽乡村的主要作用是()。①提高经济效益②加快城市化进程③减缓人口老龄化④提供清洁能源
A、 B、 C、 D、 A图形中直线数依次是1,2,3,4,(5)。
设树T的深度为4,其中度为1,2,3,4的结点个数分别为4,2,1,1。则T中的叶子结点数为()。
Disposing(处理)ofwastehasbeenaproblemsincehumansstartedproducingit.Asmoreandmorepeoplechoosetoliveclosetoget
Turningcultivatedlandbackintoforestsorpastureisafundamentalwaytostemsoil______anddesertificationinthelongrun
()变相涨价()国库券()反倾销()裙带经济
最新回复
(
0
)