Youhearthesamecomplaintallthetime:“Mymemoryisterrible.”...
問題詳情:
You hear the same complaint all the time: “My memory is terrible.” Is it all in the mind, or do real changes take place in the brain with the passing of time? The answer is that the brain’s cells, the neurons, decline and die with age. However, according to Professor Arthur Shimamura of the University of California, people vary greatly in how they change mentally with age, as well as how much their mental ability declines.
There are three main ways in which mental function changes.The first concerns speed, such as how quickly you can react to fast-moving incidents on the road. Drivers in their late teen react quickly but often drive too fast, while the over-60’s are more careful but react more slowly.This type of mental slowing results from a reduction in the efficiency with which the brain’s neurons work.
The fact that adults find it harder to learn musical instrument than children points to a second type of mental decline, the loss of learning ability with age.The part of the brain which is known to control new learning is particularly sensitive to the effects of aging.The means we have to depend more on diaries and other mental aids as we get older, take longer to learn a new language and are slower to master new things at work.
“Working memory” is the third brain function that is sensitive to the effects of aging. Absent-mindedness occurs at all ages because of imperfections in the working memory system.For example, you may continually lose your glasses, or find yourself walking into a room of your house only to find that you cannot remember what you came for.Such absent-mindedness also occurs more often as we get older.
However, evidence also shows that the principle “use it or lose it” applies to the aging brain.Professor Shimamura studied a group of university professors who were still mentally active, and compared their performance on neuropsychological tests with that of others of their age group, as well as with younger people. He found that on several tests of memory, the mentally active professors in their 60’s and early 70’s performed better than those of the same age, and as well as the younger group.
28.Memory gets worse as people grow older because _________.
A. the brain starts to produce too many neurons B. cells in the brain stop the neurons from working
C. when people get old, they complain too much D. the brain’s neurons don’t work as well as before
29.Which of the following well-known sayings best expresses the idea of the third paragraph?
A. You can’t teach an old dog new tricks. | B. Where there’s a will, there’s a way. |
C. A bird in the hand is worth two in the bush | D. It’s never too old to learn. |
30.We can conclude from Shimamura’s test on the professors that _________.
A. the principle “use it or lose it” is obviously wrong B. active minds might keep their memory better
C. memory can improve with the time passing on D. all of the old people will suffer memory loss
31.This passage is mainly about _________.
A. aging and mental ability | B. problems of getting old |
C. secrets of a good memory | D. youth and aging |
【回答】
DABA
知識點:閱讀理解
題型:閱讀理解
-
下列化學方程式與對應反應型別均正確的是( )化學方程式反應型別AH2OH2+O2↑分解反應BCaO+H2O═...
問題詳情:下列化學方程式與對應反應型別均正確的是()化學方程式反應型別AH2OH2+O2↑分解反應BCaO+H2O═Ca(OH)2化合反應C2Fe+6HCl═2FeCl3+3H2↑置換反應DSO3+2NaOH═Na2SO4+H2O複分解反應A.AB.BC.CD.D【回答】考點:書寫化學方程式、文字表達式、電離方程式;反應型別的判...
-
根據句意及首字母,寫出單詞,使句子意思完整1.Mym________birthdayisDecember13t...
問題詳情:根據句意及首字母,寫出單詞,使句子意思完整1.Mym________birthdayisDecember13th.2.Ilikep________music.3.Shew________toplaybaseball.4.Thelittleboywantssomec________.5.MissWangiso________musicteacher.6.Doyouwanttoplaywiththedogn________?7.Let'sp_...
-
1.下列加點字的讀音全部正確的一項是( )A.烘焙(bèi) 徇(xún)私 綺(qǐ)...
問題詳情:1.下列加點字的讀音全部正確的一項是( )A.烘焙(bèi) 徇(xún)私 綺(qǐ)麗 鎩(shā)羽而歸B.矯(jiáo)情 酩(míng)酊 通緝(jī) 屢見不鮮(xiān)C.懵(měng)懂 腦髓(suǐ) 聒(guō)噪 提綱...
-
用若干個體積為1的正方體搭成一個幾何體,其正檢視、側檢視都是如圖所示的圖形,則這個幾何體的最大體積與最小體積的...
問題詳情:用若干個體積為1的正方體搭成一個幾何體,其正檢視、側檢視都是如圖所示的圖形,則這個幾何體的最大體積與最小體積的差是()A.2B.3C.4D.5【回答】解析:由正檢視、側檢視可知,此幾何體的體積最小時,底層有5個小正方體,上面有2個小正方體,共7個小正方體;體積最大時,底...
相關文章
- 單項選擇。Mybrotheroftenhelpsmewithmystudy,althoughheisquite...
- Theterm“multitasking”originallyreferredtoacomputer'sabi...
- 閱讀與表達MynameisTom.I’mthirteenyearsold.Ilikesportsverymuc...
- Theterm“multitasking”originallyreferredtoacomputer'sabi...
- —It'scooltomakeashortvideobyyourmobilephone.Letmetellyo...
- Theterm“multitasking”originallyreferredtoacomputer'sabi...
- Thesummerholidaysarecomingup.It’stimetofillthebookshelv...
- 閱讀與回答問題 MotherTeresaoncesaid,“Everytimeyousmileatsomeon...
- Theterm“multitasking”originallyreferredtoacomputer'sabi...
- Theterm“multitasking”originallyreferredtoacomputer'sabi...