Since the gene, called DAF

题文

Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunity(免疫)and resistance in humans, the scientists said.“We wanted to find out how normal aging is being governed by genes and what effect the genes have on other traits, such as immunity,” said Robin May of the University of Birmingham, who led the study.Populations across the world are aging at a surprising pace, bringing potentially big challenges for health and social care systems. A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays. Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.“What we have found is that things like resistance and aging tend to go hand in hand,” May said in an interview.May’s team compared longevity, stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAF-16 in each of the four species, and found that they were all quite distinct.May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes, which scientists believe play a role in the aging process.“The fact that subtle（微妙的）differences in DAF-16 between species em to have such an impact on aging and health is very interesting and may explain how differences in lifespan and related traits have arin during evolution,” May said.71. In which ction may the text appear in a newspaper?  A. Education.  B. Science.  C. Entertainment. D. Culture. 72. According to May_________,.A. resistance has a lot to do with agingB. FOXO genes can be found in wormsC. genes play the same role in different speciesD. new drugs will change the genes in older people73. What can we know from the third paragraph?A. New ways have been found to affect aging. B. Babies in the rich world will all live longer. C. Prent social care systems are poorly managed.D. Aging populations are causing more challenges.74. From the text we know that DAF-16.A. is a gene that is only found in wormsB. can make people live longerC. has an effect on aging and immunityD. has been quite familiar to scientists75. What can be the best title of the passage?A. Scientists Find Gene linked to AgingB. Population Aging Faster than ExpectedC. How to Make People Live LongerD. Gene Determines How Long We Live 题型：未知难度：其他题型

答案

 71—75 BADCA

解析

略

考点

据考高分专家说，试题“Since the gene, call.....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

健康环保累阅读概念：

健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。