首页
登录
职称英语
[originaltext]W: Professor Marnes, I wonder if you can fill me in on your lectu
[originaltext]W: Professor Marnes, I wonder if you can fill me in on your lectu
游客
2023-09-17
67
管理
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
What puzzles the woman about extinction?
转载请注明原文地址:http://tihaiku.com/zcyy/3021643.html
相关试题推荐
[originaltext]W:Whereareyougoingforyourholidays,Charles?M:ToAustrali
[originaltext]M:Helen,canIhavealookatyournewspaper?W:Sure,goahead.
[originaltext]W:Ourbedroomneedscleaning.Shallwecleanitnow?M:Thanky
[originaltext]W:Ourbedroomneedscleaning.Shallwecleanitnow?M:Thanky
[originaltext]W:Ourbedroomneedscleaning.Shallwecleanitnow?M:Thanky
[originaltext]W:SweetHomeFurniture,canIhelpyou?M:Yes,I’dliketobuy
[originaltext]W:SweetHomeFurniture,canIhelpyou?M:Yes,I’dliketobuy
[originaltext]W:WhenareyouleavingforCambridge,Dr.Berle?M:OnWednesda
[originaltext]W:WhenareyouleavingforCambridge,Dr.Berle?M:OnWednesda
[originaltext]W:WhenareyouleavingforCambridge,Dr.Berle?M:OnWednesda
随机试题
ThismonthSingaporepassedabillthatwouldgivelegalteethtothemoral
Therehasbeenalotofhand-wringingoverthedeathofElizabethSteinberg.
WhenformerPresidentRonaldReaganfellandbrokehishipattheageof89,
烹调方便()减肥()[br]提神()可直接食用()J、L
StressStressisthebody’sreactiontoanychang
下列关于材料一中“没收他们多余的农具与好的田地,分给他们坏的”做法评述正确的足(
白血病病人在化疗期间,采用正确的护理措施是A.多饮水可酸化尿液 B.皮疹者可用
关于招标采购项目经理的责任和权力的表述中,正确的有()。A、项目经理具有财务决策
去过几次小朋友的家,就能画出具体的路线图来。认知发展到哪一阶段的儿童能做到这种
(2014年真题)不考虑其他因素,下列单位和个人中属于甲公司关联方的有()
最新回复
(
0
)