题文
Alzheimer's disease affects millions of people around the world. American researchers say the disease will affect more than one hundred million people worldwide by the year twenty fifty. That would be four times the current number. Researchers and doctors have been studying Alzheimer's patients for a century. Yet the cause and cure for the mental sickness are still unknown. However, some researchers have made important steps towards understanding it.Several early signs of the disease involve memory and thought processes. At first, patients have trouble remembering little things. Later, they have trouble remembering more important things, such as the names of their children.
There are also some physical tests that might show who is at risk of developing Alzheimer's disease. The tests look for proteins in brain and spinal cord fluid. The proteins appear to be found only in people with the disease. The protein tests correctly identify the presence of the disease in about ninety percent of patients.
Now, a much simpler physical test to predict Alzheimer's risk has been developed. Researchers found that trouble with the sense of smell can be one of the first signs of Alzheimer's. Using this information, they developed a test in which people were asked to identify twelve familiar smells. These smells included cinnamon, black pepper, chocolate, paint thinner, and smoke.
The study continued for five years. During this period, the same people were asked to take several tests measuring their memory and thought abilities. Fifty percent of those who could not identify at least four of the smells in the first test had trouble with their memory and thinking in the next five years.
Another study has shown a possible way to reduce a person's chances of developing Alzheimer's disease in old age. Researchers in Chicago found that people who use their brains more often are less likely to develop Alzheimer's disease. Those who read a newspaper, or play chess or word games are about three times less likely to develop the condition.
Researchers say they still do not know what causes Alzheimer's disease. But they say these findings might help prevent the disease in the future.
41. What’s the main idea of the passage?
A. Some early signs of the Alzheimer's disease.
B. Some physical tests about Alzheimer's disease.
C. The research about Alzheimer's disease.
D. The patients of Alzheimer's disease.
42. What’s the current number of Alzheimer’s patients?
A. 100 million B. 25 million C. 400 million D. 2050 million
43. What is not the early signs of the Alzheimer's disease according to the passage?
A. Poor memory B. Proteins exist in the brain.
C. Trouble with the sense of smell. D. Less use of the brain.
44. What does the underlined word “it” in paragraph 1 refer to?
A. Alzheimer's disease. B. Alzheimer's patients. C. The cause and cure. D. The research.
45. According to the passage, we can learn that _______.
A. there are no proteins in the brains of the people with no Alzheimer's disease
B. the people who often use their brains will not get Alzheimer's disease
C. researchers and doctors have found ways to cure Alzheimer's disease
D. the people who have the trouble with the sense of smell will certainly suffer from Alzheimer's disease 题型：未知 难度：其他题型
答案
41. C 42. B 43. D 44. A 45. A解析
41. 主旨大意题。根据全文所讨论的内容得知，选项A, B, D选项在文章中有讨论过, 但不全面。42. 细节理解题。由第一段第二,第三行可知:到2050年老人痴呆症病人的人数会达到100 million, 也就是现在的4倍,现在的人数就是25 million。
43. 细节理解题。A, B, C都是老人痴呆症的早期特征, D项指少用脑只会更容易得老人痴呆症, 而不是它的早期特征。
44. 词义猜测题。根据上文和此句的意义可知答案。
45. 推理判断题。由第三段The proteins appear to be found only in people with the disease可
考点
据考高分专家说，试题“Alzheimer's disease .....”主要考查你对 [社会现象类阅读 ]考点的理解。社会现象类阅读
社会现象类阅读概念：
这类文章通过写人记事来揭示文章的主题，显示其社会意义，一般采用顺序或倒叙来叙述。题目经常是一些细节问题。考查的方面可以是原因和其中引发的思考。
社会现象类阅读解题技巧：
这类文章通过写人记事来揭示文章的主题，显示其社会意义，一般采用顺序或倒叙来叙述。题目经常是一些细节问题。考查的方面可以是原因和其中引发的思考。阅读这类文章要理清思路。
1、浏览试题，明确要求。
在阅读文章前，最好先浏览一下文章后面的题干和选项。知道了问题后再去看文章，可使思路更敏捷，而且也便于阅读时留意文中出现的与选项有关的信息。
2、通读全文，抓住主要内容。
在不影响理解的前提下，尽可能地阅读以便在尽可能短的时间内理解文章或段落的内容。阅读时，如遇到不熟悉的单词、词组或一时看不懂的句子，不要停下来苦思冥想，继续读下去，通过上下文的词语和句子可能就理解了。
3、抓住中心思想和段落大意。
通读全文时，要特别注意主题句。每篇文章或每个段落都有与文章有关的句子，尤其是科技、政论性文章的主题句一般都在文章的开头或结尾，插在中间的很少。所以，文章的第一段或开头的第一、二个句子往往包含着文章的中心思想、作者的意图或全文的概述，因此要特别注意，彻底理解。
4、有针对性地仔细阅读，找寻所需信息。
在前面的基础上，可进行有针对性地阅读了。把与问题无关的内容一扫而过，而对于和问题有关的内容认真阅读，还可以用笔在下面做出记号。再把这些信息与问题的要求结合起来，逐条分析，综合判断，找出正确答案。
5、进行合理的推理判断。
对文章有了全面的了解之后，可以按照文章要求以及上下文之间的关系，做出推理判断。在进行推理判断的时候，需要综合考虑句型、语法、句子之间的逻辑关系、文化背景等方面的因素。
6、认真复读，验证答案。
要用全文的中心思想统帅各个题目，研究其内在联系和逻辑关系，并依次审核那些还未打上的题目，确保理解无误。
