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
2012-11-30
30
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: go 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.
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
根据对话中女士所说的I thought they were continuously improving themselves. 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。选项中的adapting对应对话中的 improving themselves。
转载请注明原文地址:https://jikaoti.com/ti/CcrFFFFM
0
大学英语六级
相关试题推荐
Malnutritionmaywellbe_______hisillhealth.
Allyoungmenarerequiredtodotwoyearsof______militaryservice.
Theaudiencehearsthewordsomanytimesduringtheplaythat______theylearnwhatitmeansiftheydidn’talreadyknow.
Absolutepovertyhasfallensteadilysincetheindustrialrevolution,whichiswhyyesterday’s______havebecometoday’snecess
Ourmagazinestryto______fortheopinionsofallwalksofpeople.
Fivechildren______beforefirefighterscouldputouttheblaze.
Theseareasrelyonagricultureutmost______,havingfewmineralresourcesandaminimumofindustrialdevelopment.
Newspaperstendto______theirinfluenceonthewaypeoplevote.
Reportersdescribedthehorrific______whichfollowedthebombing.
A、HeadmiresJean’sstraightforwardness.B、HethinksDr.Browndeservesthepraise.C、HebelievesJeanwasrudetoDr.Brown.D、
随机试题
翼外肌是由以下哪条神经支配的
维生素K可用于哪些疾病
在填筑排水反滤层前,应对坝基覆盖层进行试验分析。对于黏性土,做天然干密度、含水量及塑性指数试验;当塑性指数小于()时,尚需进行颗粒分析。
发行人应披露会计师事务所的审计意见类型。财务报表被出具带强调事项段的无保留审计意见的,应全文披露审计报告正文以及董事会、监事会及注册会计师对强调事项的详细说明。( )
2011年11月,田某为达到虚开增值税专用发票牟利的目的,伙同涂某,以涂某名义注册了永盛公司。永盛公司经营范围为中药材收购、销售、加工。12月,永盛公司取得一般纳税人资格,2011年12月至2012年6月田某以永盛公司销售中药材的名义,在仅有少量货物交易量
()含有众多酶系,是细胞中含酶最多的由两层膜包被的细胞器。
观看视频,根据要求回答问题。题目:《尊重幼儿》视频描述:一位幼儿教师在教授《动物的对话》时,让幼儿分角色表演。有一位幼儿问:“老师,我能不用书中的原话吗?’’老师和蔼地问:“为什么呢?”幼儿说:“书中的原话太长,我背不下来,但拿书表演,
古代警察的特点包括()
Whichoneofthefollowingfourisleastliketheotherthree?
StephenWilliamHawkingputforwarda______thataself-containeduniversemayhavenoedgeorboundary.
最新回复
(
0
)