Eating 40 percent less food could extend a person`s life Wap版

试题详情及答案解析

Eating 40 percent less food could extend a person`s life by 20 years, according to scientists.
Researchers at the Institute of Health Ageing at University College London are developing a treatment that they hope will fight the `disease` of getting older.
They are looking into how genetics（遗传学） and lifestyle can affect ageing and add years, possibly decades, to a person`s life.
Age-related diseases such as cardiovascular disease, cancer and neuro degeneration can also be treated, it is claimed.
They want to find out how the life of a rat can be increased by up to 30 percent simply by reducing its food intake.
Researcher Dr. Piper told the Independent : `If you reduce the diet of a rat by 40 percent it will live for 20 or 30 percent longer. So we would be talking 20 years of human life. This has shown on all sorts of animals, even Labradors(a kind of dog).`The scientists are also studying fruit flies, which share 60 percent of human genes and age in a similar manner, and mice.
They have already made the healthy lifespan(寿命) longer in both flies and mice by using drug treatments and a balanced diet. It is hoped that this combination will also work to extend(延长) human life. Dr. Piper said: `If we discover the genes involved with ageing, we should be able to delay ageing itself. This is what we`ve found.`
He added that the field of research into extending life is only a decade old, so remains `in theory . It is their special approach to treating all age-related diseases caused by the `disease` of ageing itself that sets their research apart.
【小题1】The author writes this text in order to_____.

A．encourage people to eat as little as possible

B．tell people how harmful food is to their health

C．introduce an on-going research on delaying ageing

D．show how similar mice and humans are to each other

【小题2】How can people live longer according to the text?

A．Exercise regularly.

B．Reduce their diet properly.

C．Vary their lifestyles constantly.

D．Change their genes completely.

【小题3】What does the underlined sentence in the last paragraph suggest?

A．The research is effort-taking.

B．The result of the research is reliable.

C．The research has been done for a long time.

D．There’s a long way to go to put the theory into practice.

答案：【小题1】C
【小题2】B
【小题3】D

试题分析：本文是一篇科普类文章。介绍一个有关食物的量与寿命长短的关系的研究。
【小题1】 C 考查对作者写作意图的理解。本文是客观介绍一个正在进行着的研究，没有主观意愿。因此，选C。
【小题2】 B 主旨大意题。本文的主旨大意是食物量和寿命长短的关系。根据第五段“They want to find out how the life of a rat can be increased by up to 30 percent simply by reducing its food intake.”可知。
【小题3】 D 考查学生对句子深层含义的理解。本句话的意思是这个研究才开始10年，所以还停留在理论层面，故选D。
考点：考查科普类阅读

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