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
54
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
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispart,youwillhave15minutestogooverthepassageq
A、Atthedoctor’soffice.B、Atthehospital.C、Atthedrugstore.D、Atthedepartmentstore.C
A、Mentalhospitals.B、Prisons.C、Privatehomes.D、Anyresidentialareas.CWhichofthefollowingwasmentionedasasiteforthe
CrowsareprobablythemostfrequentlymetandeasilyidentifiablemembersofthenativefaunaoftheUnitedStates.Thegreatn
A、Shecan’tfindanewplacetolive.B、Thelandlordwantshertomoveoutafteronly2months.C、Shethinksshewillloseherd
A、France.B、Italy.C、Germany.D、America.C选项都是国家。从aGermanlikeme可以得知Johnny来自德国。
Therearegoodreasonstobetroubledbytheviolencethatspreadsthroughthemedia.Movies,televisionandvideogamesareful
We______(只要看看他兴奋的眼神就可知)heissatisfiedwiththeresultoftheinterview.
Knowledgemaybeacquiredthroughconversation,watchingtelevisionortravelling,butthedeepestandmostconsistentwayisth
Knowledgemaybeacquiredthroughconversation,watchingtelevisionortravelling,butthedeepestandmostconsistentwayisth
随机试题
公共关系活动过程的三个基本要素是组织、传播和________。
Theairport______nextyearwillhelppromotetourisminthisarea.
肝小叶
心的阳气偏亢,可导致
关于马蹄肾的影像学表现,下列错误的是
下列常表现为稽留热的疾病是
A.左半结肠癌B.右半结肠癌C.小肠肿瘤D.胃癌E.壶腹癌腹部不适,无力,消瘦,发热伴贫血,粪便带脓血或黏液
A.痰多易咯B.风寒表证C.寒饮内停D.风热表证E.干燥少津风热犯肺一般以咳嗽兼见
=_________.
Passage1
最新回复
(
0
)