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
2017-12-08
41
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 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、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://kaotiyun.com/show/1sT7777K
0
大学英语六级
相关试题推荐
Amassivepoolofwarmoceanwateriscausingchangesintheatmospherethatcouldproduceunusualweatheraroundtheworldint
Whyinanageofadvancedtechnology,shouldsomanypeoplestillclingtoanancientbelief?Inpartitmustbebecauseastrolo
Inthe1920sAmericaenjoyedwhatwastobecomeknownas"anAgeofExcess".From1921-1929manufacturingoutputincreasedwith
AstudypublishedintheNewEnglandJournalofMedicineestimatedthatthereareanaverageof30in-flightmedicalemergencies
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
Dependingonwhichplayeryouask,the"Fevernova"ballthatsportsequipmentmakerAdidassaysprovidestheultimatesoccerexp
FiveMythsaboutCollegeDebt[A]Thetrillion-dollarstudentdebtburdenhascausedmanydebatesaboutthevalueofcollege.
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfriendswhentryingtoreliveparties,weddingsandot
AskmostpeoplehowtheydefinetheAmericanDreamandchancesarethey’llsay,"Success."Thedreamofindividualopportunityh
A、Afishcouldsurvivebeingfrozen.B、Fishwereeasiertocatchinwinter.C、Foodcanbekeptfrozenindefinitelylong.D、Thef
随机试题
在给排水设备中,一般为变频泵的是_______。
结核菌吸入人体后,产生变态反应的时间是
Oneofthemostimportantfeaturesthatdistinguishesreadingfromlisteningisthenatureoftheaudience.【C1】______thewriter
一个种猪场常采用相对固定的种猪精液进行人工配种,但在一段时间内,同一配种员采用同一公猪精液配种的片区,母猪空怀率普遍增多,产仔率很低,检查公猪母猪体况正常,试分析导致母猪怀孕产仔率低的原因可能是()。
无菌操作下导尿,一次导尿量不应超过
下列不是鼻腭神经阻滞麻醉的进针点的是()。
在双代号网络计划中,关键工作是指()的工作。
下列分析和预测经济波动的指标中,属于先行指标的是()。
Despitethescandalsoverleakede-mails,thescientificevidenceforglobalwarmingremainsstrong.Thequestion,then,istow
Lookatthefollowingpeopleandlistofstatementsbelow.Matcheachpersonwiththecorrectstatement.Writethecorrectlette
最新回复
(
0
)