题文
Travel is exciting and summer is a busy period for holiday travel. Many people will travel great distances in airplanes, cars or other vehicles. Experts say people should know about other health problems that can strike when traveling by air.One of these is a condition called hypoxia (缺氧症). It results from a lack of oxygen to the brain. Experts say the body begins losing oxygen minutes after an airplane leaves the ground. The air pressure in a plane during flight is lower than at sea level. This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground. Fewer oxygen molecules （分子） cross the tissues (组织) in the lungs and reach the bloodstream.
The result is a five to twenty percent drop in the amount of oxygen in the blood. This reduces the amount of oxygen that reaches the organs of the body.
One effect of this lack of oxygen to the brain is a headache. When this happens, the heart attempts to fix the situation by beating harder and faster. This can make the traveler feel tired.
These signs of hypoxia are not dangerous in a healthy person. But a drop in oxygen level can cause a health emergency in people with heart or lung problems. They might lose consciousness or even suffer a heart attack.
Experts say that smoking cigarettes and drinking alcoholic liquids also reduce the body’s ability to use oxygen. So they suggest that people not drink alcohol or smoke cigarettes either before or during a flight. They also say persons with heart or lung problems should seek advice from their doctors before flying.
小题1:The author writes the passage mainly to ___.A．warn people in airplanes of possible dangersB．offer some advice on avoiding health problemsC．explain the causes and effects of hypoxiaD．advise people not to smoke or drink alcohol小题2:According to the passage, what leads to hypoxia?A．The brain lacks enough oxygen. B．The air pressure in a plane is too highC．Our body needs less oxygen during takeoff.D．The bloodstream contains no oxygen molecules.小题3:The underlined part “fix the situation” means “___”.A．use more oxygen it needsB．increase the air pressureC．reduce the amount of bloodD．bump more blood to the brain小题4:Why should passengers not smoke or drink before flying?A．They weaken the body’s ability to use oxygen.B．Smoking may pollute the air inside the airplane. C．Drinking alcohol may raise one’s blood pressure.D．Drinking is forbidden at the airport.小题5:Do you think which the following title is the best title for this passage?A．TrallingB．how to travelC．some suggestions about on the plane while travellingD．the causes and effects of hypoxia 题型：未知 难度：其他题型
答案
小题1:C
小题2:A
小题3:D
小题4:A
小题5:D
解析
文章讲述的是关于坐飞机旅行时会出现的缺氧症的原因和造成的后果。小题1:推理判断题，根据第一段的Experts say people should know about other health problems that can strike when traveling by air可知，文章是向读者解释缺氧症的原因和后果。
小题2:事实细节题，根据第二段It results from a lack of oxygen to the brain可知，是由于大脑缺氧导致
小题3:推理判断题，根据第三段内容可知，解决这种情况指的是给大脑提供更多的血液。
小题4:事实细节题，根据最后一段Experts say that smoking cigarettes and drinking alcoholic liquids also reduce the body’s ability to use oxygen可知，
小题5:主旨大意题，文章讲述的是关于坐飞机旅行时会出现的缺氧症的原因和造成的后果
考点
据考高分专家说，试题“Travel is exciting a.....”主要考查你对 [政治经济类阅读 ]考点的理解。政治经济类阅读
政治经济类文章的概念：
要做好这类阅读，平时就要注意了解国内外发生的政治经济大事，掌握一定背景知识，对这类文章的叙述特点及内容安排有一定了解，还要扩展这方面的词汇。阅读这类文章，要抓住文章的核心，即文章整体和各段主要在说什么，也要注意段落之间的逻辑关系。
如何备考政治经济类阅读理解题：
【题型说明】政治经济类阅读文章是高考常选材料之一。该类文章时代气息浓郁，语言鲜活，但熟字新义词、超纲词及专业词语多，长句、难句多。政治类文章大多数是同学们感性趣的内容，读起来倒有似曾相识的感觉，经济类文章读起来就像是雾里看花，文章看完，一头雾水。再加之这类文章的命题侧重于词义猜测、推理判断和文章主旨，同学们对这类题材是望而生畏。
【备考策略】建立心理优势。针对不同体裁的文章，我们要采取相应的阅读方法和技巧。政治类文章多采用记叙文形式，我们可采取“顺读法”，以便抓关键语句，领会文章主旨；而经济类文章则多采用说明文形式，我们则可以采取“逆读法”，先读试题，再从文章中查找有用信息。若遇到的确难读的材料。千万不用着急，因为你觉得难，其他人也一定是同感。在高考前，我们就要有这种心理准备，高考试卷肯定有一、两篇难以阅读的材料。不过，我们平时可以有意识地从报刊杂志上找一些较难的阅读材料来阅读，以培养自己迎难而上的心理素质。
【答题方法】
1、寻找主干：
根据英语中五种基本句型结构，把句子中的主语、谓语、宾语、表语等主要成分找出来，其他成分如定语、状语、补语等则易于理解。找到了句子主干，句子的意思至少明白了一半。
2、剔除从句：
在一个长句中可能会出现若干个从句，在理解时，如果把各个从句剔除出来单独理解，然后把大意拼凑起来，整个长句的意思就会明白六、七分。
3、辨别分句：
一个长句如果是由几个并列、转折、递进、对比关系的分句组成，句中往往有表示这些分句关系的连接词，只要能弄清楚分句和分句之间的逻辑关系，再把各层分句的意思加以连贯，整个长句的句意基本上能跃然脑中。
4、寻找关键词：
如果一个句子看完，一点句意的感觉也没有，下下策就是抓住句中的关键词，通过关键词大体弄懂这个长句的意思。
