首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Our memories are fantastically complex, but anyone who has ever used a personal computer has a ready-made model with which to co
Our memories are fantastically complex, but anyone who has ever used a personal computer has a ready-made model with which to co
admin
2010-03-26
33
问题
Our memories are fantastically complex, but anyone who has ever used a personal computer has a ready-made model with which to compare them. The computer model is not perfect, however. For a start, the largest mainframe (主计算机)in the world can not compete with the potential brain power of human beings. Packed into even the thickest of human skulls are some 1,000 billion cells, or neurons, and each one can connect with thousands of its neighbors. Each connection represents a ’bit’ of information and, in theory, we can carry more bits than there are atoms in the known universe.
There are two quite distinct types of memory-short-term and long-term. Our short-term memories are those which we hold on to for just as long as we need them. The vast majority of our everyday thoughts, sights and impressions are registered in the short-term memory only. They take the form of patterns, or linked pathways, created by circulating currents of electrical energy. So long as the current is buzzing around its little route, the memory that it represents stays in the mind. But once the current dies down, the memory, too, starts to fade. While short-term memories consist of active electrical circuits, long-term memories are quite literally etched (铭刻) into our brains. It seems that if the pathways taken by a particular electrical current are well-trodden, or if the current passing along them is strong enough, the cells along the way change, so that the route or pattern is permanently marked.
Events which have strong meaning for us are particularly likely to be upgraded into the long-term memory. Part of the reason is probably that we go over and over these memories, keeping the pathways stimulated and the electrical current high. It’s also likely that certain chemicals come into play, too. When we are excited, very happy, or frightened, our glands pump out chemicals such as adrenaline. One theory has it that some of these chemicals stimulate the neurons to alter their structure and forge permanent connections with each other.
It follows, then, that a memory formed when we are ’up’ is more likely to stick than one registered when we are down. Several experiments seem to bear this out. In one, a group of students was first shown an exciting film, then given a list of words to memorize. Another group was shown a miserable film, then given the same learning task. Next day the group who watched the happy film could remember 20% more words than the other group.
About the memory in comparison with the computer the writer says that ______.
选项
A、neither of them is completely reliable all the time
B、the memory is more complicated than the computer
C、the computer operates in a more organized way than the memory
D、neither of them is used to its fullest capacity all the time
答案
B
解析
依据文章第一段第一句至第三句“Our memories are fantastically complex,but anyone who has ever used a personal computer has a ready-made model with which to compare them.The computer model is not perfect,however For a start,the largest mainframe in the world can not compete with the potential brain power of human beings”可知,文中的memories是指人脑,文中的“世界上最大的主计算机也无法与人脑的潜力相比”也说明了人脑的复杂性,故B项正确。
转载请注明原文地址:https://kaotiyun.com/show/8wk7777K
0
大学英语四级
相关试题推荐
A、Thewomanshouldtakebusesmorefrequently.B、Hehastodealwithtrafficjams.C、Thewomanshouldtakethesubway.D、Hehate
In1993,womenheld46percentofthepayingjobsintheUnitedStates.Asthechildrengrewup,mostofthemothersenteredth
A、Mexican.B、Russian.C、Chinese.D、Japanese.AWhatthemeistheweddingpartygoingtobe?此题考查听细节信息能力。解题的关键点在于听到Mexican,Mexican
A、At9:30.B、At10:30.C、At10:00.D、At11:00.C根据选项,推测对话的内容与数字相关,因此特别关注对话中出现的数字,并进行记录以方便计算。答案是C。
A、Hewantstogoshopping.B、Heistootired.C、Heisgoingtoteachaforeignstudent.D、HeisgoingtolearnEnglish.C[听力原文]
A、$60.00.B、$40.00.C、$48.00.D、$54.00.B根据对话中“sheaskedmetospendonly40.”可以判断此题答案为B。
A、Theman’s.B、Thewoman’s.C、Brian’s.D、Theman’sbrother’s.C根据选项,推测对话的内容与某物的所属相关。对话中涉及到选项中的四个人。但是听到问题之后可以判断答案为C。
A、Astudygroup.B、Ahistoryexam.C、Theman’spainting.D、Aprofessionalartist.C综合推断题,结合听力材料可知,对话一直围绕男士的画作展开,所以C正确
Withtheadvancementofmedicaltechnologyandsocialwelfare,oldageis,tomanypeople,nolongeraproblem.However,therei
OriginsofaPlagueSomegaybashersbelieveitisGod’swayofpunishinghomosexuals(同性恋).SomeAfricanssuspectitisjust
随机试题
马克思主义认为国家的本质是指()。
男性,60岁左右,在门诊楼排队取药时突然晕倒在地。如确认患者发生心脏骤停,下列紧急处理中不正确的是()
沥青混合料马歇尔试件成型过程中,需要加热的器件有()。
基坑(槽)应采取支护措施的情形有()。
在民事诉讼中,普通的共同诉讼必须具备的条件有()。
一般资料:求助者,男性,17岁,高中二年级学生。案例介绍:求助者有一次上课迟到,着急跑向自己的座位,不小心被绊倒并摔到一位女同学的身上,顿时引起同学哄堂大笑,事后还有人取笑他。此后每次到教室时就会紧张焦虑,觉得同学看不起他。常常会用力抓自己的头发
()同志曾强调指出:“加强党对政法公安工作的领导是始终不渝地坚持的一个原则。人民民主专政是一个整体功能,要在党的统一领导下进行协调。”
中国历史上曾出现过多次所谓盛世。盛世的出现是和法制的相对健全分不开的,法制是推动盛世出现的条件,又是盛世的外在标志。从来没有无法制的盛世,也从来没有盛世而法制衰微的现象。即使是入主中原的少数民族,在立定脚跟之后也急于立法,以适应统治广大汉族地区的需要。对这
将不能量化的诗歌(以及纯文学)评价标准和人工智能的算法标准拼接在一起,本来就是一件不伦不类的事。人工智能在科学研究、生产劳动等方面的贡献,足以证明其本领之强,________________。人类也完全没必要拿自己的优势去跟人工智能的缺点比较,即使科技再发
TherearemanytheoriesaboutthebeginningofdramainancientGreece.Theonemostwidelyacceptedtodayisbasedontheassum
最新回复
(
0
)