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
Designing a lens can be compared to playing chess. In chess a player tries to trap his opponent’s king in a series of moves. On
Designing a lens can be compared to playing chess. In chess a player tries to trap his opponent’s king in a series of moves. On
admin
2013-10-11
31
问题
Designing a lens can be compared to playing chess. In chess a player tries to trap his opponent’s king in a series of moves. On creating a lens, lens designers attempts to "trap" light by forcing all the rays arising from a single point in the subject to converge on a single point in the image, as a consequence of their passing through a series of transparent elements with precisely curved surfaces. Since in both cases the ultimate goal and the means by which it can be attained are known, one is tempted to think there will be a single best decision at any point along the way. The number of possible consequences flowing from any one decision is so large, however, as to be virtually, if not actually, infinite. Therefore in lens design, as in chess, perfect solutions to a problem are beyond reach. The same principles apply to all lenses.
The lens designer has one enormous advantage over the chess player. The designer is free to call on any available source of help to guide him through the countless number of possibilities. Most of that help once came from mathematics and physics, but recently computer technology, information theory, chemistry, industrial engineering and psychophysics have all contributed to making the designer’s job immeasurably more productive. Some of the lenses on the market today were inconceivable a decade ago. Others whose design is as much as a century old can now be mass-produced at low cost. With the development of automatic production methods, lenses are made by the millions, both out of glass and out of plastics. Today’s lenses are better than the best lenses used by the great photographers of the past. Moreover, their price may be lower, in spite of fact that the 19th century craftsmen worked for only a few dollars a week and today’s lenses are more complex. The lens designer cannot fail to be grateful for the science and technology that have made his work easier and his creations more widely available, but he is also humbled: it is no longer practical for a fine photographic lens to be designed from beginning to end by a single human mind.
Compared with a chess player, lens designer_____.
选项
A、can put his design to mass production
B、can draw on various sources in his work
C、can reduce the cost of lens production
D、has no one to train him before taking up the work
答案
B
解析
细节理解题。第二段第一句指出,与下棋者相比,透镜的设计者有一大优势:他可以自由地运用手头上一切可利用的资源(call on any available source of help),帮助他从无数可能性中做出选择。意为;在工作中可以利用各方面的帮助。
转载请注明原文地址:https://kaotiyun.com/show/qzGK777K
0
专业英语四级
相关试题推荐
TheReviewofEuropeanHistoryWritingforanhistoricalseriesistricky,andtheoutcomeisnotalwaysasuccess.Thebest
Thefootballplayerwasnotnominatedbythecommittee,______notverypopularwithallitsmembers.
Hespokeso______thatevenhisopponentswerewonoverbyhisarguments.
Forhim,happiness______indrinkingbeerandplayingvideogames.
Inmyneighborhoodintheearly1980s,wespentthesummerplayingkickball.Ourfrontlawnswereaconstant.Wetooktheirsoft
Inmyneighborhoodintheearly1980s,wespentthesummerplayingkickball.Ourfrontlawnswereaconstant.Wetooktheirsoft
Inmyneighborhoodintheearly1980s,wespentthesummerplayingkickball.Ourfrontlawnswereaconstant.Wetooktheirsoft
随机试题
低温钢埋弧焊的重要问题是保证焊缝金属的低温韧性,防止塑断现象。
对实现教育规划的目标起关键作用的环节是()
请描述竞争优势的作用以及波特的竞争战略如何帮助组织获得竞争优势?
大动脉炎的基本病理改变为白塞病的基本病理改变为
可的松本身即具生物活性,在肝内转化为氢化可的松,同样也具生物活性。()
(2015年)被称为2003年新《巴塞尔资本协议》“支柱”的内容包括()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
在超市购物后,张林把七件商品放在超市的传送带上,肉松后面紧跟着蛋糕,酸奶后面接着放的是饼干,可口可乐汽水紧跟在水果汁后面,方便面后面紧跟着酸奶,肉松和饼干之间有两件商品,方便面和水果汁之间有两件商品,最后放上去的是一只蛋糕。如果上述陈述为真,那么,以下哪项
结合材料回答问题:材料11939年7月7日,朱自清在散文《这一天》中写道:“从两年前这一天起,我们惊奇我们也能和东亚的强敌抗战,我们也能迅速的现代化,迎头赶上去。世界也刮目相看,东亚病夫居然奋起了,睡狮果然醒了。从前只是一大块沃土,一大盘散沙的
A、Nottingham.B、Birmingham.C、Derbyshire.D、WestYorkshire.D女士问男士是否诺丁汉本地人,男士给出了否定回答,并说自己来自西约克郡(WestYorkshire),D为答案。A“诺丁汉”是男士就读
最新回复
(
0
)