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、Because human beings are powerful enough to kill one another. B、Because every species will become extinct by natural selection
A、Because human beings are powerful enough to kill one another. B、Because every species will become extinct by natural selection
admin
2014-04-30
44
问题
W: 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: 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, 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.
W: Frightening thought, isn’t it?
Questions 13 to 15 are based on the conversation you have just heard.
13. Why does the woman go to see the professor?
14. What puzzles the woman about extinction?
15. Why is the professor not so sure humans will never become extinct?
选项
A、Because human beings are powerful enough to kill one another.
B、Because every species will become extinct by natural selection.
C、Because there is over-population that will make the earth explode.
D、Because human beings are a young species exploiting their environment.
答案
D
解析
转载请注明原文地址:https://jikaoti.com/ti/cPqFFFFM
0
大学英语六级
相关试题推荐
ThesignsofAmericaninfluenceonCentralAmericaareeverywhere:McDonald’sandKFC,moviesandclothes.Lesseasyto【B1】_____
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
A、It’snotnecessarytocollectinformationaboutthecompany.B、Yourunderstandingofthejobrequirementsisveryimportant.C
A、Shereadsmoreslowlythanthemandoes.B、Shehasalotofmaterialtoreadbeforeshehascoffee.C、Themandoesmoreworkt
A、Nobodychecksinexceptatweekends.B、Thehotelisfullexceptatweekends.C、Itistoofulltoaffordanytouristatweekend
随机试题
病灶已做局部引流和应用抗生素后,仍有寒战、高热,最合适的治疗措施是
A.精神分裂症单纯型B.精神分裂症偏执型C.精神分裂症青春型D.精神分裂症未分化型E.精神分裂症残留型青少年起病,逐渐加重的孤僻离群,被动退缩,话少,很少与亲友交流,对情绪刺激缺乏相应的反应。
肺痈成痈期的最佳治法是( )。
制芒硝时每100kg用萝卜
某企业采用资产负债表债务法核算所得税,上期适用的所得税税率为15%,“递延所得税资产”科目的借方余额为540万元,本期适用的所得税税率为25%,本期计提无形资产减值准备3720万元,上期已经计提的存货跌价准备于本期转回720万元,本期“递延所得税资产”科目
对客户经营管理的供应阶段进行分析,信贷人员应重点关注()方面。
SpeakerA:I’vegotafeverandareallybadheadache.SpeakerB:______
科学社会主义的核心内容是
Itseemsthat______ofthepeopleinEnglandareinfavorofawomanbishop.
WhatdoJapanesechildrenfeelfromtheirparents?Theyfeelheavy______fromtheirparents.
最新回复
(
0
)