Question

12．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 vesse ls 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（復(fù)雜性） are 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 helps 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：

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．
Exercise	Do a combination of stretching aerobic and musclestrengthening every day．
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 toD．
A．inform us how the brain works
B．show how special the brain is to us
C．tell us that the brain plays an important role in our lives
D．give us advice on how to keep the brain healthy
55．The underlined word"stunning"meansA．
A．a(chǎn)mazing 　       
B．strange     
C．important　      
D．interesting
56．According to the text，more exerciseC．
A．keeps our mind sharp     
B．gives our brain a rest 　
C．helps improve our memory  
D．is good for brain cells communicating with each other
57．In order to keep brain healthy，we should avoidA．
A．eating a large supper                            
B．doing puzzles
C．eating a good lunch                          
D．taking aerobic exercise．

Answer 1

分析 本文屬于說(shuō)明文閱讀，作者通過(guò)這篇文章主要向我們介紹了給大腦保健的方法：合理的營(yíng)養(yǎng)、適度的運(yùn)動(dòng)和智力活動(dòng)，同時(shí)介紹了大腦結(jié)構(gòu)的精巧和復(fù)雜，而這種精巧和復(fù)雜遠(yuǎn)遠(yuǎn)超出人們的想象，令人驚嘆．

解答 54．D  細(xì)節(jié)理解題，文章第一、二段介紹大腦的神奇，意在喚起讀者對(duì)于大腦的贊嘆并為下文"大腦保健"進(jìn)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是為了就如何保持大腦健康給我們提供建議．故選D．
55．A  推理判斷題，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(yuǎn)遠(yuǎn)超出人們的想象，令人驚嘆．故選A．
56．C  細(xì)節(jié)理解題．由第三段Exercise stimulates a hormone in our brain that improves memory．一句可知，運(yùn)動(dòng)可刺激大腦里有助于改善記憶的荷爾蒙的分泌．故選C．
57．A  細(xì)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(yíng)養(yǎng)要求早飯、午飯吃好，避免豐盛的晚餐．故選A．

點(diǎn)評(píng) 考查學(xué)生的細(xì)節(jié)理解和推理判斷能力．做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確選擇．在做推理判斷題時(shí)不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．