More and more scientific experiments prove that physical exerci can reduce the

题文

More and more scientific experiments prove that physical exerci can reduce the dangers of some illness in middle-aged persons．Exerci strengthens the heart muscle，reduces blood pressure and help to prevent muscles from changing into fat．Physical exerci is just as important for children．Exerci and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to u an exerci wheel in their cage．If  they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．The same differences in growing speed might be found between active and inactive children．Physical exerci helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exerci weighed about 3％more than tho of the mice that did not exerci The mice that exercid are much quicker to learn doing new exerci than the mice that did not exerci．The results of the experiments suppo the theory that exerci can help babies learn to talk and walk sooner than expected．The good effects of physical exerci are not limited to children and middle-aged people．Exerci continues to be an important part of our lives after we grow old．For example，people over 50 years old begin to lo calcium(钙) from their bones，which get weaker and can break easily．Physical exerci，however，helps to strengthen the bones and to prevent them from losing calcium．Of cour，old people can take medicines to prevent themlves from suffering from losing calcium．But the medicines they take increa the chance of developing some kind of cancer(癌)．So physical exerci is a much safer treatment(治疗)．小题1:From the passage we know that .A．mice need to eat more and exerci moreB．children need more exerci than other peopleC．old people like to take medicine to treat their illnessD．middle-aged people are easy to get fat小题2:Active children    than inactive children．A．enjoy walking moreB．are cleverer and healthierC．are stronger but more foolishD．are cleverer but weaker小题3:Why are the bones of old people easy to break according to the passage?A．Becau they are easy to become ill．B．Becau they eat less than other people．C．Becau they have less exerci than other people．D．there is less calcium in their bones than in tho of other people．小题4:The passage tells people that   .A．only middle-aged persons can benefit from physical exerciB．physical exerci can do good to both the middle-aged and childrenC．people of different ages can all benefit from physical exerciD．physical exerci is the safest treatment for losing calcium 题型：未知难度：其他题型

答案

小题1:D小题1:B小题1:D小题1:C

解析

小题1:从第一段前两句可知，体育锻炼可减少中年人得某些疾病的可能性，因为运动可加强心肌功能，防止肌肉转化为脂肪，有助于减肥。小题1:通过试验表明，参加活动要比不参加活动生长快，身体健康。小题1:根据课文最后一段第三句可知，老年人容易骨折是因为他们比其他人缺钙。小题1:通读全文可知，身体锻炼适合任何年龄段，儿童、中年、老年无一例外。

考点

据考高分专家说，试题“More and more scient.....”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。