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
100
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.
【F5】
选项
答案
首先,人类的寿命超出了正常阈值,或许人类就不再是人类了。
解析
①本句是复合句。主句用it might be that结构中肯地引出第一个risk“风险”的所在。that后面的不定式to extend our lives beyond our normal span是表语从句中的状语,意为“使人类寿命超出正常阈值”。②表语从句中的must表示猜测,推断在to extend our lives beyond our normal span情况下的人类情况。③other than本义是“与……不同,非”,这里是指人类就不成其为人了。
转载请注明原文地址:https://kaotiyun.com/show/kW2Z777K
0
考研英语一
相关试题推荐
ReadthefollowingtextandanswerthequestionsbychoosingthemostsuitablesubtitlefromthelistA-Gforeachnumberedpara
Readthefollowingtextandmatcheachofthenumbereditemsintheleftcolumntoitscorrespondinginformationintherightco
Afundamentalproblemforunderstandingtheevolutionofhumanlanguagehasbeenthelackofsignificantparallelsamongnonhuma
Manyyoungpeoplegotouniversitywithoutclearideaofwhattheyaregoingtodoafterwards.Ifastudentgoestoauniversity
Manyyoungpeoplegotouniversitywithoutclearideaofwhattheyaregoingtodoafterwards.Ifastudentgoestoauniversity
Writealetterofabout100words,makinganapplicationtobeapostgraduatecandidateofauniversity.Youshouldwritenea
ThefirstcluecamewhenIgotmyhaircut.Thestylistofferedacomplimentarynail-polishchangewhileIwaitedformyhairto
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,【B1】______this
Aseveryoneknows,therearefartoomanypeopleintheword.Oratleast,theresoonwillbetoomanypeople,becausetherate
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
随机试题
简述制定茶叶标准的内容
应诊断为手术方法是选择
预防性树脂充填的适应证不包括
锅炉结渣,指灰渣在高温下粘结于受热面、炉墙、炉排之上并越积越多的现象。结渣使锅炉()。
运用动态控制原理控制施工质量时,质量目标不仅包括各分部分项工程的施工质量,还包括()。
在Word编辑状态下,通过()可以选中整个文档内容。
下列属于资产要素的项目有()。
()是商业银行管理操作风险的基础。
“干越夷貉之子,生而同声,长而异俗,教使之然也。”这句话体现了哪种因素对人发展的重要影响?()
设有函数说明语句: intfun(int,int); 以及函数指针定义语句: int(*f)(int,int); 若要使函数指针指向函数fun的入口地址,以下选项中正确的是()。
最新回复
(
0
)