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．a(chǎn)mazing
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 本文介紹了給大腦保健的方法：合理的營養(yǎng)、適度的運動和智力活動．

解答 54．B  寫作目的題  文章第一、二段介紹大腦的神奇，意在喚起讀者對于大腦的贊嘆并為下文"大腦保健"進行鋪墊．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．一句揭示作者的寫作意圖．故選擇B項．
55．D  主旨大意題  文章前半部分介紹了大腦的精巧和復(fù)雜．這種精巧和復(fù)雜遠遠超出人們的想象，令人驚嘆．故選擇D項．
56．B  細節(jié)理解題．由第三段Exercise stimulates a hormone in our brain that improves memory．一句可知，運動可刺激大腦里有助于改善記憶的荷爾蒙的分泌．故B項正確．
57．C 細節(jié)理解題  從表格中For breakfast，eat like a king； for lunch，like a queen； for supper，like a beggar．一句可知，給大腦保健所需要的合理營養(yǎng)要求早飯、午飯吃好，避免豐盛的晚餐．故C項正確．

點評 做閱讀時經(jīng)常犯錯的主要原因是，僅憑讀過文章后殘留在腦海中的一絲印象來勾選答案，這樣便很容易掉入出題人故意設(shè)布下的題目陷阱．所謂閱讀理解，對于題目的理解一定要忠實于原文，因此，每一道題都應(yīng)該與原文作全面的對比與核查，再得出答案．也就是說，閱讀理解的每一道題目，在原文都應(yīng)該有明確的出處，我們把這一出處叫做原文相關(guān)句，（1）排除與原文相關(guān)句主題不一致的選項（2）排除與原文相關(guān)句態(tài)度相反的選項 （3）排除用于過于極端或負面的選項（4）注意結(jié)合文章主旨和主題去排除．