14．Each of us can live strong，healthy，energetic lives for a long time to come．The key？Actually，there are many of them．
Eat fewer calories，but more food
Slimming down can help prevent disease，and cutting way back on the amount you eat may even slow the aging process．When nutrition researchers invited themselves over for dinner in kitchens across the globe-from Greece to Japan to the state of Pennsylvania--they discovered a stomach-satisfying secret to good health：Pile your plate high with vegetables and fruits，add respectable parts of beans and whole grains，and ignore high-calorie food like cheeseburgers，cream sauces，and fatty meats．
Use exercise as an anti-aging vaccine
Exercise can help you gain a better quality of life as you age．It's no secret that physical activity strengthens muscles，burn calories，and puts a happy bounce in your step．But recently，researchers discovered a new，extra benefit：Exercise acts as a powerful way against the aging process itself．When exercise physiologists put healthy people aged 60to 85on Weight-training programs for six months then tested them for signs of free-radical（自由基） damage，they were surprised by the results．By the end of the study，low-intensity exercisers had a drop in free-radical damage，while high-intensity exercisers had a slight increase．
Find something interesting to do
Life is always busy no matter what your age．But the truth is，when people are retired，time usually does become more available for adults after 60．With this time come choices．The easy one is merely to relax：watch more TV，eat out more often，talk on the phone as much as you want．The better choice？Discover something more meaningful to devote yourself to and do it wholeheartedly．
49．Which of the following is what you should eat more？B
A．Fatty meats．
B．Whole grains．
C．Cream sauces．
D．Cheeseburgers．
50．The new discovery of exercise probably is thatD．
A．it can help you live a better life
B．it can strengthen muscles
C．it can burn calories
D．it can prevent aging process
51．When do you have more free time according to this text？B
A．In your fifties．
B．Beyond sixty
C．Over seventy
D．Before sixty．
52．The best title of this text should be"C"．
A．How to Keep a Balanced Diet
B．The Importance of Your Health
C．Keys to living Longer and Better
D．Hobbies making Your Healthy．
分析 每个人都想过健康，精力充沛的生活，在本文中作者提出了几项关键的方面．首先，要少吃含热量多的食物，多吃谷物类，蔬菜，水果等．其次，要积极锻炼，防止衰老．找些有意义的事情做，要心情轻松．
解答 49．答案 B 细节理解题．根据文章第二段 add respectable parts of beans and whole grains，and ignore high-calorie food like cheeseburgers，cream sauces，and fatty meats．可知选B．
50．答案 D 细节理解题．根据文章第三段小标题Use exercise as an anti-aging vaccine和段内Exercise acts as a powerful way against the aging process itself．可知选D．
51．答案 B 细节理解题．从文章末段But the truth is，when people are retired，time usually does become more available for adults after 60．可知六十岁以后人们自由时间更多，选B．
52．答案 C 主旨大意题．文章首段提出人们都希望过健康的生活这一话题，随后提出．The key？Actually，there are many of them．然后在下文中介绍了健康生活的几个方面，由此判断选C．
点评 1、要想做好科普英语阅读理解题，同学们就要注意平时多读科普知识类文章，学习科普知识，积累常见的科普词汇，从根本上提高科普英语的阅读能力．
2、要熟悉科普类文章的结构特点．科普类文章一般由标题（Head line），导语（Introduction），背景（Back ground），主体（Main body）和结尾（End）五部分构成．标题是文章中心思想高度而又精辟的概括，但根据历年的高考情况来看，这类阅读理解材料一般不给标题，而要同学们选择标题．导语一般位于整篇文章的首段．背景交待一个事实的起因．主体则对导语概括的事实进行详细叙述，这一部分命题往往最多，因此，阅读时，同学们要把这部分作为重点．结尾往往也是中心思想的概括，并与导语相呼应，命题者常在此要设计一道推理判断题．
3、在进行推理判断时，同学们一定要以阅读材料所提供的科学事实为依据，同时所得出的结论还应符合基本的科普常识．
