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
考研
Why do animals grow old and die at characteristic ages? Even if maintained in peak condition and not eaten by your cat, your ham
Why do animals grow old and die at characteristic ages? Even if maintained in peak condition and not eaten by your cat, your ham
admin
2019-08-08
56
问题
Why do animals grow old and die at characteristic ages? Even if maintained in peak condition and not eaten by your cat, your hamster is unlikely to make it much past its second birthday. And your cat might live for ten times that. Yet neither cat nor hamster will ever match the average healthy human for longevity.
A study uses demographic data to reveal a lifespan that human beings cannot exceed. It’s like running. 【F1】
Elite athletes might shave a few milliseconds off the world record for the 100-metre race, but they’ll never run the same distance in, say, five seconds, or two.
Human beings are simply not made that way. The same is true for longevity. 【F2】
The consequences of numerous factors related to our genetics, metabolism, reproduction and development, all shaped over millions of years of evolution, means that few humans will make it past their 120th birthdays.
Maximum lifespan is a bald measure of years accumulated. It is not the same as life expectancy, which is an actuarial measure of how long one is expected to live from birth, or indeed from any given age. 【F3】
Life expectancy at birth has increased in most countries over the past century, not because people have longer lifespans, but mainly because infectious disease does not kill as many infants as it once did.
【F4】
So if we owe our increases in life expectancy to better public health, nutrition, sanitation and vaccination, is it not fair to ask whether more-effective treatments for diseases such as cancer, Parkinson’s disease and Alzheimer’s might also yield dividends in maximum lifespan?
Will 120th birthday parties become routine, outmatched by a small yet increasing number of sesquicentenarians? The demographic data say no. People are living longer, and the population as a whole is greying, but the rate of increase in the number of centenarians is slowing, and might even have peaked.
Could it be possible, in some science-fictional future, to break free from the bonds of human life expectancy and increase lifespan indefinitely? Technological solutions might one day transcend the limitations of the human body. But the risks of transcendence are twofold. 【F5】
First, it might be that to extend our lives beyond our normal span, we must somehow become other than human.
After all, what would a 50-year-old hamster be like? Second, there is a risk that life wouldn’t really be that much longer—it would only feel like it.
【F2】
选项
答案
这是人类基因、新陈代谢、生殖和发育经由几百万年的进化演变,受到无数因素影响而得出的结论:鲜有人能活到120岁。
解析
①本句是复合句。介词短语of numerous factors修饰主句主语,表示“多种因素带来的结果”。②主句主语后有两个过去分词短语充当的后置定语,第一个是related to our…and development,意为“与人类基因、新陈代谢、生殖和发育有关”。第二个是all shaped over millions of years of evolution,意为“由几百万年的进化演变而成”。③宾语从句包含“make+宾语+宾补”的结构,意思是使宾语变成宾补所描述的那样。此处it指代的是前文的longevity,意为“人类的寿命不能长于……”。
转载请注明原文地址:https://kaotiyun.com/show/NW2Z777K
0
考研英语一
相关试题推荐
Writeanessaybasedonthefollowingpiechart.Inyourwriting,youshould1)interpretthechart,and2)giveyourcommen
AnonymityisnotsomethingwhichwasinventedwiththeInternet.Anonymityandpseudonymityhasoccurredthroughouthistory.For
Likeatiredmarriage,therelationshipbetweenlibrariesandpublishershaslongbeenreassuringlydull.E-books,however,are
Supposeyourfriend,Anne,hasbeenpromotedtothemonitor.Andsheaskedforyouradviceonhowtoserveasanexcellentclass
Afundamentalproblemforunderstandingtheevolutionofhumanlanguagehasbeenthelackofsignificantparallelsamongnonhuma
A.Title:WHERETOLIVE—INTHECITYORTHECOUNTRY?B.Timelimit;40minutesC.Wordlimit;120-150words(notincludin
Ifsoldieringwasforthemoney,theSpecialAirService(SAS)andtheSpecialBoatService(SBS)wouldhavedisintegratedinre
Accordingtothosewhosupportmergersrailwaymonopolyisunlikelybecause______.Whatismanycaptiveshippers’attitudetow
Eugeneresentshismother’sinsistencethathe______tochurch,
随机试题
简述阿尔波特的价值观分类。
肺总容量等于()
患者,男,70岁。咳嗽、咳痰,伴痰中带血3个月。胸片提示右肺门类圆形阴影,边缘毛躁,有分叶。提问l:该患者最可能的诊断是A.肺结核B.肺脓肿C.肺不张D.肺癌E.肺气肿F.肺炎
施工产品不像一般的工业产品那样先生产后交易,而是先交易后生产,即由建设单位事先选定施工单位签订施工承包合同,然后在施工现场根据合同约定的条件进行生产。这体现了()。
输入的动植物、动植物产品和其他检疫物运达口岸时,检疫人员可以到运输工具上和货场实施现场检疫,核对货、证是否相符,并可以按照规定采取样品。( )
某企业需借入资金600000元,贷款银行要求将贷款数额的20%作为补偿性余额,故企业需向银行申请的贷款数额为()元。
从装满100克浓度为80%的盐水杯中倒出40克盐水,再倒入清水将杯倒满,这样反复三次后,杯中盐水的浓度是多少?()
讯通驾校希望减少中老年学员的数量。因为一般而言,中老年人的培训难度较大。但统计数据表明,该校中老年学员的比例在逐渐增加。很显然,讯通驾校的上述希望落空了。以下哪项如果为真,最能削弱上述论证?
Usingapublictelephonemaywellbeoneof【C1】______oflife,demandingpatience,determinationand【C2】______,togetheronoccas
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】theturnofthelastcenturywhenjazz(爵士乐)wasborn,A
最新回复
(
0
)