阅读理解。 A Brown University sleep rearcher has some advice for people w

题文

阅读理解。 A Brown University sleep rearcher has some advice for people who run high schools: Don't start class so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not bethat their parents have failed to enforce (确保) bedtime. Instead, it may be that biologically the sleepyhead students aren't ud to the early hour. "Maybe the kids me being asked to ri at the wrong time for their bodies," says Mary Carskadon, a professor looking at problem of adolescent (青春期的) sleep at Brown's School of Medicine. Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a morebasic level. She and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns. Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less,as commonly thought. Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents preferto stay up later at nigh and sleep later in the morning. But it's not just a matter of choice-their bodies are goingthrough a change of sleep patters. All of this makes the transfer from middle school to high school-which may start one hour earlier in the morning-all the more difficult, Carskadon says. With their incread need for sleep and their biological clocks t on the "sleep late, ri late" pattern, adolescent are up against difficulties when it conics to trying to be upby 5 or 6 a.m. for a 7:30 a.m. first hell. A short sleep on a desktop may be their body's way of saying. "I needa timeout." 1. Carskadon suggests that high schools should not start class so early in the morning becau _____. A. it is really tough for parents to enforce bedtime B. it is biologically difficult for students to ri early C. students work so late at night that they can't get up early D. students are so lazy that they don't like to go to school early 2. The underlined phra "nod off" most probably means " _____". A. turn around B. agree with othersC. full asleepD. refu to work 3. What might be a reason for the hard transfer middle school to high school? A. Adolescents depend more on their parents. B. Adolescents have to choo their sleep patterns.C. Adolescents sleep better than they did at childhood. D. Adolescents need more sleep than they ud to. 4. What is the test mainly about? A. Adolescent health care. B. Problems in adolescent learning.C. Adolescent sleep difficulties.D. Changes in adolescent sleep needs and patterns. 题型：未知难度：其他题型

答案

1-4: BCDD

解析

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考点

据考高分专家说，试题“阅读理解。 A Br.....”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。