首页
登录
职称英语
To live forever was the dream of many emperors in ancient China. People was
To live forever was the dream of many emperors in ancient China. People was
游客
2025-04-21
32
管理
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) [br] "’Ancient saying"(Line 1 , Para. 4) is the equivalent to ______.
选项
A、maxim
B、slogan
C、slang
D、proverb
答案
D
解析
A“格言”、B“口号”、C“俚语”、D“谚语”。
转载请注明原文地址:https://tihaiku.com/zcyy/4047677.html
相关试题推荐
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
ManypeoplewhohavenotvisitedBritaincallalltheinhabitantsEnglish,f
随机试题
______enablesustoknowthepastandtouseitinpreparingforthefuture.A、B
HowtodevelopthewillpowerJustassomeoneputsit,w
Iwastryingtoreadthedirections_____andabsurd.A、whichwasconfusedB、whic
[originaltext]W:Scopecharityoffice,howcanIhelpyou?M:Ohhello.[1]I’m
Forthispart,youareallowed30minutestowriteanessayentitledHowto
He______averyinterestingnovelatsixp.m.yesterday.A、isreadingB、werer
从旅游发展历史的角度来考察,对旅游者的产生和各国旅游活动的发展一直起着决定性作用
通过遍历用例的路径上基本流和备选流的黑盒测试方法是( )。A.等价类划分法
热对流,是指热靠液体或者气体的流动来传递的现象下列现象中,属于热对流现象的是A
下列选项中,属于档案管理内容的有()。A.物业权属资料 B.业主的权属档案资
最新回复
(
0
)