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
2010-09-25
39
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、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
四个选项都是由疑问词引导,均使用的是正常语序,故本题应该是针对what提问,内容很可能与物种灭绝有关。根据对话中女士提到的Why do they die off?…Natural selection,…可知,女士对物种不能够通过适应环境来避免灭绝这一问题感到很困惑,故答案为A。
转载请注明原文地址:https://kaotiyun.com/show/bnz7777K
0
大学英语六级
相关试题推荐
A、Localnewspaper.B、Nationalnewspaper.C、Google.D、NewswebsitesontheInternet.A在原文可以听到"agreatplacetostartisyourlo
Whydowecry?Canyouimaginealifewithouttears?Notonlydotearskeepyoureyeslubricated,theyalsocontaina【B1】______
Thetaskofbeingacceptedandenrolledinauniversityorcollegebeginsearlyforsomestudents.Long【C1】______theygraduate
TheInteriorDepartmentproposedWednesdaytodesignatepolarbearsasathreatenedspecies,sayingthattheacceleratinglosso
A、Peopleshouldcontinuetoworkuntiltheyarequiteold.B、Peopleshouldearnalotofmoneybeforeretirement.C、Peopleshoul
A、Theyshouldn’tmaketoomanyrequests.B、Theyshouldaskforfurtherextension.C、Theyshouldfinishtheprojectasscheduled.
A、13million.B、30million.C、14million.D、40million.B细节判断题文中谈到图书馆内共藏有书画作品3,000多万册。
A、History.B、Literature.C、Science.D、Math.B
Computershavebeentaughttoplaynotonlycheckers,butalsochampionshipchess,whichisafairlyaccurateyardstickformeas
A、Novels.B、Collectionsofmaps.C、Magazines.D、Fictionstories.B综合推断题。由文章中的theReferenceLibrary可知,这是一间参考书阅览室,所以不可能借阅小说、杂志或科幻故
随机试题
货币是数字数据类型的特殊类型,等价于具有【】属性的数字字段类型。
A、阵发性自发痛B、冷刺激一过性痛C、机械刺激痛D、甜酸刺激痛E、热刺激迟缓痛;下列疾病的疼痛特点慢性闭锁性牙髓炎
埋设后的单盘直埋光缆,金属外护层对地绝缘电阻竣工验收指标为不低于()MΩ.km。
某悬臂梁受力情况如下,其B点处的弯矩数值大小为()。
家庭财产保险的保险金额一般由投保人根据财产的( )价值自行估价确定。
下列关于国际税收协定的陈述,正确的有()。
膨化工艺淀粉糊化后长时间放置也会发生老化现象。()
A、 B、 C、 D、 D
【B1】______【B11】______
WhowontheWorldCupfootballgame?WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?【C1】______aneve
最新回复
(
0
)