Question

17．Work your brain!
Between 2 and 3 pounds of wonder，it controls everything we say，do or think，who we are and what we care about，the way we walk or laugh or figure out things，what we like and the talents we possess，how we see and talk and run and jump and process our food．
The brain uses 20 percent of our body's oxygen and 20 percent of its blood．Somewhere within its protein，fat，100，000 miles of blood vessels and 100 billion nerve cells，it helps us remember where we put our gym shoes．Change our temperature so we don't die because of the heat or cold．Speed us up or slow us down．Help us choose between orange juice or orangeflavored drinks．
Its complexity is stunning，far beyond anything most of us can imagine．To keep this work of art as polished as possible we need to eat right，exercise and keep mentally stimulated．
Good nutrition help s brain cells communicate with each other．Exercise stimulates a hormone in our brain that improves memory．Mental stimulation keeps you sharp even as you age．
"It's very important that we tell people to be physically active and mentally active，"said neurologist Malcolm Stewart．
"People cannot stop aging，but you're able to reduce the damage； you're able to keep the function up．"
Following are Dr．Stewart's advice for improving brain health：
l  Nutrition    
Avoid fast food．Follow the old adage（格言）：For breakfast，eat like a king； for lunch，like a
queen； for supper，like a beggar．
l  Exercise     
Do a combination of stretching aerobic and musclestrengthening every day．
l  Mental games 
Try to have a sense of hope about the future．Do puzzles．Listen to music．Reach out to others to make their lives better．
54．The purpose of the author in writing this passage is toB．
A．inform us how the brain works
B．give us advice on how to keep the brain healthy
C．tell us that the brain plays an important role in our lives
D．show how special the brain is to us
55．The word"stunning"in Paragraph 5 meansD．
A．interesting 　      
B．strange             
C．significant　       
D．amazing
56．According to the text，more exerciseB．
A．keeps our mind sharp       
B．helps improve our memory
C．gives our brain a rest 　       
D．is good for brain cells communicating with each other
57．In order to keep brain healthy，we should avoidC．
A．eating a good lunch         
B．doing puzzles
C．eating a large supper           
D．taking aerobic exercise．

Answer 1

分析 本文介绍了给大脑保健的方法：合理的营养、适度的运动和智力活动．

解答 54．B  写作目的题  文章第一、二段介绍大脑的神奇，意在唤起读者对于大脑的赞叹并为下文"大脑保健"进行铺垫．然后以To keep this work of art （杰作）as polished as possible we need to eat right，exercise and keep mentally stimulated．一句揭示作者的写作意图．故选择B项．
55．D  主旨大意题  文章前半部分介绍了大脑的精巧和复杂．这种精巧和复杂远远超出人们的想象，令人惊叹．故选择D项．
56．B  细节理解题．由第三段Exercise stimulates a hormone in our brain that improves memory．一句可知，运动可刺激大脑里有助于改善记忆的荷尔蒙的分泌．故B项正确．
57．C 细节理解题  从表格中For breakfast，eat like a king； for lunch，like a queen； for supper，like a beggar．一句可知，给大脑保健所需要的合理营养要求早饭、午饭吃好，避免丰盛的晚餐．故C项正确．

点评 做阅读时经常犯错的主要原因是，仅凭读过文章后残留在脑海中的一丝印象来勾选答案，这样便很容易掉入出题人故意设布下的题目陷阱．所谓阅读理解，对于题目的理解一定要忠实于原文，因此，每一道题都应该与原文作全面的对比与核查，再得出答案．也就是说，阅读理解的每一道题目，在原文都应该有明确的出处，我们把这一出处叫做原文相关句，（1）排除与原文相关句主题不一致的选项（2）排除与原文相关句态度相反的选项 （3）排除用于过于极端或负面的选项（4）注意结合文章主旨和主题去排除．