题文
阅读理解。 A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.Vitamin D is produced naturally by the skin in response to (对…的反应) sunlight and may help to
slow the ageing process and protect against heart disease, according to the study.
Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at
their telomeres-a biological marker of ageing found in DNA. As people get older, their telomeres get
shorter and they become more susceptible (易受伤害的) to certain illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres-a sign of
being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the
ageing process as a whole.
Lead researcher Dr Brent Richards said, "These results are exciting because they show for the first
time that people who have higher levels of vitamin D may age more slowly than people with lower levels
of vitamin D." This could help to explain how vitamin D has a protective effect on many ageing related
diseases, such as heart disease and cancer."
Professor Tim Spector, a co-author of the report, added, " Although it might sound absurd(荒唐的),
it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy
effect on the general ageing process.
Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body's supply, but
lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.1. A certain amount of sunshine helps people stay young because _________.A. people feel happy and energetic in the sun
B. sunshine protects people against heart disease
C. vitamin D makes one's skin look young and healthy
D. vitamin D may help to slow the ageing process2. From Brent Richards, we know that ________.A. sunlight causes skin cancer to people with high level of vitamin D
B. the study generally has a healthy effect on the general ageing process
C. vitamin D can only be got from fish, eggs and breakfast cereals
D. the higher levels of vitamin D people have, the more slowly people may age3. What can we infer from the passage?A. Telomeres are important as they are signs of ageing of the DNA.
B. Sunlight can be dangerous as it causes skin cancer.
C. Sunlight does more good than harm to our health.
D. Vitamin D can also be gained from food.4. What is the best title of the passage?A. Secret of Staying Young
B. Vitamin D Helps Slow Ageing
C. Sunlight and Vitamin D
D. Sunlight and Health 题型：未知难度：其他题型
答案
1-4: DDCB解析
该题暂无解析
考点
据考高分专家说，试题“阅读理解。 A he.....”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。
