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
About ten men in every hundred suffer from colour blindness in some way; women are luckier only about one in two hundred is affe
About ten men in every hundred suffer from colour blindness in some way; women are luckier only about one in two hundred is affe
admin
2011-02-28
57
问题
About ten men in every hundred suffer from colour blindness in some way; women are luckier only about one in two hundred is affected in this manner. There are different forms of colour blindness. A man may not be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person cannot tell the differenee between blue and green. In rare cases an unlucky man may see everything in shades of green—a strange world indeed.
In certain occupations colour blindness can be dangerous and candidates are tested most carefully. For example, when fighting at night, soldiers use lights of flares to signal to each other. A green light may mean "Advance" and a red hght may mean "Danger! Keep back!" You can see what will happen if somebody thinks that red is green! Colour blindness in human’ beings is a strange thing to explain. In a single eye there are millions of very small things called "cones". These help to see in a bright light and to tell the difference between colours. There are also millions of "rods" but these are used for seeing when it is nearly dark. They show us shape but not colour. Wait until it is dark tonight, then go outside. Look round you and try to see what colors you can recognize.
Birds and animals which hunt at night have eyes which contain few or no cones at all, so they cannot see colours. As far as we know, bats and adult owls cannot see colours at all. Similarly cats and dogs cannot see colours as well as we can. Insects can see ultraviolet rays which are invisible to us, and some of them can even see X-rays. The wings of a moth may seem grey and dull to us, but to insects they may appear beautiful, showing colours which we cannot see. Scientists know that there are other colours around us which insects can see but which we cannot see. Some insects have favorite colours. Mosquitoes like blue, but do not like yellow. A red light will not attract insects but a blue tamp will.
Among people who suffer from colour blindness ______.
选项
A、some may see everything in shades of green
B、few can tell tile difference between blue and green
C、few may think that red, orange and yellow are all shades of green
D、very few may think that everything in the world is in green
答案
D
解析
在第一段最后一句中作者说在罕见的病例中,不幸的患者会把色彩都当作是深浅不同的绿色。A、B、C的错误之处都在于对色盲人数多少的限定词 some 或 few 不够准确。
转载请注明原文地址:https://jikaoti.com/ti/d0zsFFFM
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Sincethedawnofhumaningenuity,peoplehavedevisedevermorecunningtoolstocopewithworkthatisdangerous,boring,burd
About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof.Butwhentheannualgamesforthedisabledwere
About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof.Butwhentheannualgamesforthedisabledwere
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
WhendidBikobecomethehonorarypresidentoftheBlackPeople’sConvention?
PaulJohnson’sHistoryOfTheAmericanPeopleiswhatwehavecometoexpectfromthisproductivewriter—clear,colorfulnarrati
PaulJohnson’sHistoryOfTheAmericanPeopleiswhatwehavecometoexpectfromthisproductivewriter—clear,colorfulnarrati
Jenise:Ilovepeasandbeansmorethanmostpeople,sotofuisanaturalchoiceforme.MyChinesefriendAnnabellelovesthem
随机试题
发生灾害事故时,把人民群众的财产安全放在第一位,全力抢救受困群众,防范次生灾害,努力减少人员伤亡。()
非定期维护一般包括走合维护、()维护和长期停驶或封存汽车的维护。
初产妇第二产程不应超过活跃期延长是指此期超过
斜刺是指进针时针身与皮肤表面的角度为()
通常用于细菌学检验的标本可于4℃存放2~3天。()
【真题(中级)】下列有关审计独立性的表述,正确的是()。
无商业价值的广告品及货样,经海关审核无误后可以免征关税。()
某化肥厂生产一批化肥,原计划每天生产4.5吨,可以按时完成任务。结果每天产量提高到6吨,只用15天就完成任务。问比原计划的时间提前几天完成?( )
设一个工程由两个窗体组成,其名称分别为Fornm1和Fornm2,在Fomm1上有一个名称为Commandl的命令按钮。窗体Fornm1的程序代码如下:PrivateSubCommandl_Click()PrivateSubg(fA
Consideringtheirvastnumbersintheseventeenthcentury,notmuchsheepareraisedinSpaintoday.
最新回复
(
0
)