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
To live forever was the dream of many emperors in ancient China. People was ordered to call them Wansui, which means 10 000 year
To live forever was the dream of many emperors in ancient China. People was ordered to call them Wansui, which means 10 000 year
admin
2013-01-28
47
问题
To live forever was the dream of many emperors in ancient China. People was ordered to call them Wansui, which means 10 000 years, but no human could live that long. How long can humans really live? According to the latest scientific discovery, humans are able to live up to the age of 120 or perhaps even longer.
Several recent studies showed that our life span can be extended far beyond normal limits. Cynthia Kenyon, a professor at the University of California in San Francisco, doubled the life of a worm from two weeks to a month. By changing the function of a single gene, known as daf-2, the scientist not only added extra days to the worm’s life but also kept it as healthy as worms which were half its age.
There are two similar genes in the bodies of mammals. By changing the function of one gene, scientists extended the life of a mouse by 18 per cent (or 4. 5 months). Another gene is called IGF-1. Researchers still don’t know how it affects our body. But by reducing its functions, the life of a mouse increases by 33 per cent (or 8. 6 months). The average life span of a mouse is 26 months.
In the experiment of extending life,
an ancient saying
, ’’you are what you eat," also seems to be true. Vegetables contain fewer calories than meat, and help to prolong life, scientists say. Research has found that taking in fewer calories affects our lives in a similar way to reducing IGF-1.
US biologist John Phelan suggests low calorie diets could increase human life span, but there is no proof yet.
Researchers are still waiting for the results of a study started in 1987. Monkeys are fed with low calorie food to see what happens. A monkey’s typical life span is 40 years, so there is a little while to wait.
In China, average life expectancy has now reached 70, double that of 1949. Increasing the length of our lives may bring us closer to the dreams of our ancient emperors. But it may also cause social problems such as housing and employment, social scientists have warned. (360 words)
Which of the following is false?
选项
A、It’s advisable that we eat vegetarian foods always.
B、Different living creatures have diverse genes concerning life expectancy.
C、Nowadays people can live twice longer than the people before 1949.
D、There is still a long way to go before humans can find the solution to human life span.
答案
C
解析
由于C项“如今的人寿命比1949年那个年代的人寿命长一倍”,没有限定中国人,而文章中有in China,故选C。
转载请注明原文地址:https://kaotiyun.com/show/kk1O777K
0
考博英语
相关试题推荐
AlmosteverydaythemediadiscoversanAfricanAmericancommunityfightingsomeformofenvironmentalthreatfromlandfills,ga
Whatattractscustomers?Obviouslythequalityofaproductdoes,butvisualimages【C1】______agreatdeal.Itisnotonlytheima
Hisofficeis_____tothePresident’s;itusuallytakeshimaboutthreeminutestogetthere.
Universitiesarefrequentlyjudgedonthebasisoftheaccomplishmentsoftheirprofessorsandscientists.Scientistswhopublis
TheEuropeanUnionrevealedonJanuary23rdhowitplanstosavetheworld.Amammothclimate-changeplanspellsoutindetailh
HenryDavidThoreauusedtoramblethroughthewoodsbeforehewrotehismostfamousbookWalden(1854).
Imagineaworldinwhichtherewassuddenlynoemotion--aworldinwhichhumanbeingscouldfeelnoloveorhappiness,noterror
InJuly,almostunnoticedbythenationalpress,adeadlybirdvirusarrivedonapheasantfarminSurrey.ExpertsfromtheDepa
TogetfromKathmandutothetinyvillageinNepal,DaveIrvine-Hallidayspentmorethantwodays.Whenhearrived,hefoundvil
Thebasicreasonfortheexistenceofmulti-nationalcompaniesisthecompetitiveadvantageofaglobalnetworkofproductionan
随机试题
Isdialogueausefulwaytointroducenewmaterial?Whyorwhynot?
国有企业建立现代企业制度,应按照产权清晰的要求拥有()
一个社会的教育发展进程与其政治经济发展进程之间的关系是()
非霍奇金淋巴瘤与Ewing肉瘤的区别
A.保和丸B.健脾丸C.枳实消痞丸D.枳实导滞丸E.木香槟榔丸
女性,30岁,低热、腹胀、腹痛1个月。查体:腹部弥漫性压痛,揉面感,移动性浊音阳性,对诊断最有意义的检查是
案例:某教师在进行圆锥曲线的教学时,给学生出了如下一道练习题:求过点(0,1)的直线,使它与抛物线产y2=2x仅有一个公共点。某学生的解答过程如下:问题:(1)指出该生解题过程中的错误,分析其错误原因;
()
以下的for循环______。for(x=0,y=0;(y!=123)||(x<4);x++)
He’sperfectly(content)(living)inahutand(paint)pictures(allday).
最新回复
(
0
)