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
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is
admin
2020-03-30
73
问题
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colors seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties pf surfaces that give rise to color do not seem to change greatly under a wide variety of illumination colors, usually(but not always)looking much the same in artificial light as in daylight. Both of these effects seem to be due in large part to the mechanism of color adaptation mentioned earlier.
When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not immediately affect the color seen but usually does affect the next area to which the gaze is shifted. The longer the time of viewing, the higher the intensity, and the larger the area, the greater the effect will be in terms of its persistence in the succeeding viewing situation. As indicated by the work of Wright and Shouted, it appears that, at least for a first approximation, full adaptation takes place over a very brief time if the adapting source is moderately bright and the eye has been in relative darkness just previously. As the stimulus is allowed to act, however, the effect becomes more persistent in the sense that it takes the eye longer to regain its sensitivity to lower intensities. The net result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensity, the loss of sensitivity produced by the first area will still be present and appear as an "afterimage" superimposed on the second. The effect not only is present over the actual area causing the "local adaptation" but also spreads with decreasing strength to adjoining areas of the eye to produce "lateral adaptation. " Also, because of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become uniform over the whole eye.
The present selection has apparently been preceded by some explanation of______.
选项
A、some experiments with color pigments
B、the nature of color
C、the color properties of various surfaces
D、the mechanism of the eye’s adaptation to color
答案
D
解析
本题中,A、B、C三项都与文章的意思不符。从文中可知,D项“眼睛的颜色适应能力”符合文意。因此D项为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/J1TO777K
0
考博英语
相关试题推荐
Ateacherissomeonewhocommunicatesinformationorskillsothatsomeoneelsemaylearn.Parentsarethe【C1】______teachers.Ju
BeforehighschoolteacherKimberlyRughgotdowntobusinessatthestartofarecentschoolweek,shejokedwithherstudents
Thebedhasbeen______inthefamily.Itwasmygreatgrandmother’soriginally.
Becauseofarecentobstacleinproduction,saleshavedroppedandaccordinglyprofitshave______.
Bethworkedhardto______inwiththelocalsduringhervisit.
ItisAestimatedthatascientificprinciplehasBalifeexpectancyofapproximatelyaCdecadebeforeDitdrasticallyrevisedor
Iboughtanalarmclockwitha(n)______dialwhichcanbeseenclearlyinthedark.
It’s______mypowertomakefinaldecisiononthematter.
TheNewYorkTimeshas______inFrance,Germany,andothercountries.
InsomeAfricancountries,thecostoftreatinganAIDSpatientmay______hisorherentireannualincome.(2013年3月中国科学院考博试题)
随机试题
“曾子以子游之言告於有子”中“於”的用法是
下列疾病的预防以第一级预防为主要控制策略的是
一般堆石体最大粒径不应超过层厚的()。
现代证券组合理论的开端是()。
下列关于非居民企业所得税相关规定表述不正确的是()。
可以使信息传递与过程控制等的相关成本得以节约,并能大大提高信息的决策价值与利用效率的财务管理体制是()。
单位要进行科长职位的人员遴选。经过笔试。业务骨干小张和小刘入选。同事们私下议论说小刘的父亲是市政府某职能部门的负责人,小刘肯定能够顺利晋级。工人家庭出身的小张听到上述议论后。要主动放弃面试。假如你是小张的同事兼好友。你如何说服小张参加面试?
在集贸市场上买东西,讨价还价是普遍的现象。商品的卖者总是抬高卖价,买者总是压低买价,而商品最后的成交价格,则往往是买卖双方协商的结果。这种现象表明市场价格的形成:
OSI参考模型从低到高第3层是【 】层。
以下选项中函数形参不是指针的是
最新回复
(
0
)