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 humans won’t become extinct in the future. C、Why species become extinct
A、Why species don’t avoid extinction by adapting. B、Why humans won’t become extinct in the future. C、Why species become extinct
admin
2019-09-21
41
问题
W: [5]Professor Smith, 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: [6]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 human.
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, [7]but now, of course, we survive by ingenuity!
W: So we may never become extinct.
M: [8]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.
W: Frightening thought, isn’t it?
Questions 5 to 8 are based on the conversation you have just heard.
5. Why does the woman go to see the professor?
6. What puzzles the woman about extinction?
7. What does the professor say about human beings’ survival?
8. Why is the professor not so sure humans will never become extinct?
选项
A、Why species don’t avoid extinction by adapting.
B、Why humans won’t become extinct in the future.
C、Why species become extinct at the rate they do.
D、How many species aren’t extinct at present.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/AyW7777K
0
大学英语六级
相关试题推荐
A、Itwascreatedmainlyforscientificresearch.B、Itworksbetterinfineweatherconditions.C、Itmustbelocatedonatleast
Wearelockedinagenerationalwar,whichwillgetworsebeforeitgetsbetter.Noonewantstoadmitthis,becauseit’sugly
Throughoutevolution,humanshavebeenactive.Ourancestorschasedpreyashunter-gatherersand【C1】______frompredators.Morer
Officeworkerswhowouldnormallystepintoapuborgymtocopewiththestressofaworkingdayarebeinginvitedinsteadtos
Dependingonwhichplayeryouask,the"Fevernova"ballthatsportsequipmentmakerAdidassaysprovidestheultimatesoccerexp
Electroniccigarettesarehandheldnicotine-deliverydevicesthat,despiteadevotedfollowing,arecurrentlyswirlingincontro
Thedesireforachievementisoneoflife’sgreatmysteries.Socialscientistshavedevotedlifetimesstudyingthedrivesthats
ThereisnothingnewaboutTVandfashionmagazinesgivinggirlsunhealthyideasabouthowthintheyneedtobeinordertobec
A、Theboy’sparents.B、Theboy’ssummerholiday.C、Theboy’sstudy.D、Anillness.C主旨题。根据Notreally,boy.Howmanysubjectsdi
A、Oneofthemanyriders.B、Animportantorganizer.C、Promoterofthisgroupeffortforfreedom.D、Achurchleader.D
随机试题
背景某施工项目进展到第15周后,对前14周的工作进行统计检查,有关情况如下表所示:问题计算14周末的合计BCWS、ACWP。
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;womenareluckieronlyaboutoneintwohundredisaffec
女性,32岁。产后1周,昨日出现恶寒发热,肢体、关节疼痛,屈伸不利,怕冷恶风,舌淡,苔薄白,脉浮紧。治疗应首选的方剂是()
行政机关应当自受理行政许可申请之日起多少日内作出行政许可决定。
为建设工程提供机械设备和配件的单位,未按照安全施工的要求配备齐全有效的保险、限位等安全设施和装置的,责令限期改正,处合同价款()的罚款。
下列各项中,属于转移风险对策的有()。
下列属于资产负债表日后事项中“调整事项”的是()。
材料1:过去五年,贵州逐步开启新时代乡村振兴新征程,全力赶、加快转、奋力超,农业在变强,乡村在变美,农民在变富。2017年,贵州农村人均可支配收入比全国平均少4635元。贵州全省贫困人口290万,占全国贫困人口的9%,贫困发生率8%,远高于全国贫困发
设f(x)∈C[0,1],f(x)>0.证明积分不等式:lnf(x)dx≥lnf(x)dx.
在数据访问页的工具箱中,用于绑定HTML的图标是
最新回复
(
0
)