Question

1．Man still has a lot to learn about the most powerful and complex part of his body-the brain．
It may be surprising to learn that it isn't age that makes you lose your memory．The reason could be that you have a"lazy"memory，not an old one．Like your body your memory improves with exercise．Once given plenty of exercise，the brain keeps its power．Before discussing how to improve the memory，let's look at how the brain works．There are two sides to the brain，the left and the right．The right side deals with the senses （what we see，hear，feel and smell）．It's the creative and imaginative side．The left side is concerned with logic．It analyzes information and puts it in order．
Some recent research suggests that we remember everything that happens to us．The problem most of us has is recalling events．Most forgetting takes place immediately after learning．An hour after learning something new，more than 50% has been forgotten．After a month，80% has been forgotten，and so on．
This shows revision is very important．If you revise new material you have learnt，you remember much more．So it's of vital importance to revise newly learned material often，and have frequent breaks．We best remember what we learn at the beginning of a learning period and at the point where we stop．After the break，revise what was learned before the break and then continue learning the new material．These breaks should happen every 20 or 45 minutes．
Other experiments have shown the brain needs time to"digest"what has been learned．The time necessary for this is 5 to 10 minutes．After the break，the memory will have absorbed what it has just learned，and more will be remembered．During this period it is important to exercise the right side of the brain，because the left side is used during the learning period．Therefore you should relax．Listening to music，breathing in fresh air，and looking at a picture are all ways of using the other side of the brain．So when you are studying alone，make a plan which shows when to have breaks and to revise newly learned material immediately before you begin studying again．If you do in this way，your memory will improve．

47．According to the text，you lose your memory byB．
A．getting too old                                  
B．hardly using your brain
C．working too hard                                 
D．using your brain too much
48．To fight forgetting effectively，we're advised toA．
A．go back to what was learned regularly
B．break down materials into small pieces
C．focus on both ends of a learning period
D．take breaks to give the brain a good rest
49．During the learning process the brain need breaks toC．
A．use the right side of the brain  
B．revise newly learnt materials
C．take in what has been learnt     
D．relax the left side of the brain
50．Where is this text most probably taken from？D
A．Science fictions．
B．Students'literature．
C．An advertisement．
D．A science report．

Answer 1

分析 本文是一篇科教類閱讀．文章主要介紹了我們會遺忘記憶的原因，并講述了如何更有效地對抗遺忘，如何讓記憶保留更長久，如何更好地使用大腦、鍛煉大腦等．為了有效地對抗遺忘癥，我們應(yīng)該有規(guī)律地去回顧已經(jīng)學(xué)過的內(nèi)容．

解答 47．B推理判斷題．根據(jù)第二段The reason could be that you have a"lazy"memory，可知原因可能是你有一個"懶惰"的記憶；和Like your body your memory improves with exercise．可知你的記憶隨著鍛煉提高．由此推知，當(dāng)你幾乎不利用大腦，你可能會喪失記憶力．故選B．
48．A細節(jié)理解題．根據(jù)第四段We best remember what we learn at the beginning of a learning period and at the point where we stop．可知我們最好記得在一個學(xué)期階段開始學(xué)習(xí)的內(nèi)容，和在我們停止學(xué)習(xí)的過程中的內(nèi)容．由此推知，為了有效地對抗遺忘癥，我們應(yīng)該有規(guī)律地去回顧已經(jīng)學(xué)過的內(nèi)容．故選A．
49．C推理判斷題．根據(jù)最后一段Other experiments have shown the brain needs time to"digest"what has been learned．可知其它實驗已經(jīng)表明，大腦需要時間來"消化"已經(jīng)學(xué)會的東西．由此推知，在學(xué)習(xí)的過程中，大腦需要休息去吸收已經(jīng)學(xué)過的東西．故選C．
50．D推理判斷題．本文通篇講的都是科普知識：如何使用我們的大腦，如何提高我們的記憶．這是一篇科普類短文，所以最有可能摘自一份科學(xué)報告．故選D．

點評 本文考察學(xué)生的理解推斷能力以及細心程度，只要抓住文章的關(guān)鍵詞，采用尋讀的方法查找細節(jié)，就能找到正確答案．