题目内容
17．It sounds an ad from late-night TV：Follow this four-step plan and improve your memory in just 14days!But researchers have indeed found a way to improve memory function in older people．After a two-week study that involved brainteasers（脑筋急转弯），exercise and diet changes，study participants'memories worked more efficiently．Here's the program：Memory Training：Brainteasers，crossword puzzles and memory exercises that emphasized verbal skills throughout the day．
Healthy Diet：Five meals daily included a balanced diet rich in omega-3fats，whole grains and antioxidants．Eating frequent meals prevents dips in blood glucose，the primary energy source for the brain．
Physical Fitness：Brisk daily walks and stretching．Physical fitness has been found in other research to reduce the risk of Alzheimer's disease．
Stress Reduction：Stretching and relaxation exercises．Stress causes the body to release control，which can impair memory and has been found to shrink the memory centers in the brain．
Before-and-after brain scans showed the participants experienced on average a five percent decrease in brain metabolism in the dorsal lateral prefrontal region of the brain，which is directly linked to working memory and other cognitive functions．This suggests they were using their brains more efficiently．The subjects also performed better on a cognitive test．However，a control group that didn't follow the plan showed no significant changes．
"We've known for years that diet and exercise can help people maintain their physical health，which is a key component of healthy aging，"said Gary Small，professor of psychiatry and behavioral sciences UCLA．"But maintaining mental health is just as important．Now we have evidence which suggests that people can keep their memory by adding memory exercises and stress reduction．"
11．What is the main idea of this passage？C
A．To focus on the importance of individual health
B．To persuade the readers to do more usual exercises
C．To discuss ways for people to maintain memory
D．To prove some ads form TV can be believable
12．In paragraph 5，the underlined word"release"probably meansA．
A．send out B．prevent
C．come across D．change
13．If a personal feel seriously stressed，it can lead toB．
A．Alzheimer's disease
B．a bad memory
C．a certain decrease in brain metabolism
D．a lack of blood glucose
14．What would be the best title for this passage？D
A．Exercise Help to Maintain Physical Health
B．Different Ways Contribute to Healthy Aging
C．Ads Suggest Ways to Sharpen Memory
D．Study：14-Day Plan Improves Memory
15．Which of the following is NOT included in the program to improve the older people's memory？D
A．Health diet
B．Physical fitness
C．Stress reduction
D．Beneficial activities．
分析 本文为科普类文章，介绍了14天增强记忆的方法．研究人员真的找到了一种提高老年人记忆功能的方法．通过两周的脑筋急转弯、体育锻炼和饮食调整，参与者的记忆力确有增强．
解答 11---15 CABDD
11．答案C．主旨大意题．根据第一段最后两句话After a two-week study that involved brainteasers（脑筋急转弯），exercise and diet changes，study participants'memories worked more efficiently．Here's the program可知，文章主要介绍14天改善记忆的训练项目．故选C．
12．答案A．词义猜测题．release意为"释放"，对应A选项send out．prevent预防，阻止．come across偶遇．change改变．句意：紧张会导致人体释放皮质醇，降低记忆力，缩小记忆中枢在大脑中的比重．
13．答案B．推理判断题．根据第五段Stress causes the body to release control，which can impair memory and has been found to shrink the memory centers in the brain可知，紧张会导致人体释放皮质醇，降低记忆力，缩小记忆中枢在大脑中的比重，从而导致记忆力下降．故选B．
14．答案D．主旨大意题．本文为科普类文章，介绍了14天增强记忆的方法及相关研究．故选D．
15．答案D．细节理解题．根据第三段Healthy Diet，排除A选项．根据第四段Physical Fitness，排除B选项．根据第五段Stress Reduction，排除C选项．故选D．
点评 阅读理解解题技巧：1．迅速将整篇文章分解，理出文章结构；2．迅速抓住文章叙述的主题；3．迅速找出各部分的中心意思，并找出表达中心意思的句子．
