Question

12．During the 19th century，scientists found that when certain parts of the brain of a person were hurt，he would lose the power of doing certain things．And so，people thought that each part of the brain does a different job．But modern research has discovered that this is not so，for it is not easy to show exactly what each part of the brain does．
   In the past fifty years there has been a great increase in the amount of researches done on the brain．Scientists have found out the way the brain works is not so simple as people in general may think．Chemists tell us that about 100，000 chemical changes take place in the brain every second．Some recent researches also suggest that we can remember everything that happens to us．We may not be able to think of the thing that happens to us．We may not be able to think of the things we have heard and seen，but they're all kept there in the storehouse of the human mind．
Earlier scientists thought that the power of one's brain got weaker and weaker as one grows older．But it is now thought that that is not true．As long as the brain is given plenty of exercise，it keeps its power．It has been proved that an old person who has always been active in the mind has a quicker mind than a young person who has only done physical work without using much of his brain．
60．In the 19th century，scientists found that a person would lose the power to do certain thingsD．
A．when he had drunk too much
B．a(chǎn)fter he did a quite different job
C．if he had been greatly frightened
D．if certain parts of his brain were hurt
61．Scientists today are still unable to show exactlyA．
A．what each part of the brain is doing
B．which part of the brain is the most important
C．whether each part of the brain does the same work
D．how many chemical changes take place in the brain each second
62．It has been found that the brain usually worksC．
A．in a very simple way
B．a(chǎn) little now and a little then
C．without any rest all day long
D．in a fairly complicated （復(fù)雜的） way
63．Which of the following is NOT true？C
A．Scientists are working hard to solve the mysteries of the brain． 
B．As many as six million changes take place in the brain every minute．
C．A young man doing physical work is sure to have a much slower mind．
D．Even an old man may have a quick mind only if his brain is given much exercise．

Answer 1

分析 本文介紹了如果給我們的大腦足夠的練習(xí)，人的大腦就會(huì)做更多的事情，而且這個(gè)不會(huì)隨著年齡的變化而變化．

解答 DACC
60  D  細(xì)節(jié)題．根據(jù)文章第一段1，2行During the 19th century，scientists found that when certain parts of the brain of a person were hurt，he would lose the power of doing certain things．說(shuō)明當(dāng)人的大腦的一部分損壞的時(shí)候，身體的一部分的功能也失去了．D正確．
61  A   細(xì)節(jié)題．根據(jù)第一段最后2行But modern research has discovered that this is not so，for it is not easy to show exactly what each part of the brain does．說(shuō)明現(xiàn)在的科學(xué)家還沒(méi)有徹底搞清楚這樣的問(wèn)題，故A正確．
62  C    推理題．根據(jù)第二段3，4行Chemists tell us that about 100，000 chemical changes take place in the brain every second．說(shuō)明人的大腦每秒鐘都在運(yùn)行，沒(méi)有休息的時(shí)間．故C正確．
63   C   細(xì)節(jié)題．根據(jù)文章最后一段It has proved that an old person who has always been active in the mind has a quicker mind than a young person who has done physical work without using much of his brain．說(shuō)明如果不運(yùn)用腦子來(lái)思考，那么一定會(huì)思維緩慢．如果用腦子思考了，就會(huì)思維迅速．故C項(xiàng)的說(shuō)法不準(zhǔn)確．

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