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
31
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.
According to the passage, dogs and cats,
选项
A、as well as human beings can not see some colours
B、have fewer cones than human beings
C、have less rods than human beings
D、can see colours as well as human beings
答案
B
解析
这是道推断题,文章第三段第三句说,猫和狗识别颜色的能力不如人类,而前文又说了不能识别颜色是因为锥状细胞少,由此,我们可以推断出猫和狗的锥状细胞不如人类多。这里易误选的是A,注意文中的aswellas是“不如……好”的意思,是比较级的as…as形式,不是作为“也”意思讲的短语“aswellas”。
转载请注明原文地址:https://kaotiyun.com/show/Cptd777K
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
About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof.Butwhentheannualgamesforthedisabledwere
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
WhendidBikobecomethehonorarypresidentoftheBlackPeople’sConvention?
PaulJohnson’sHistoryOfTheAmericanPeopleiswhatwehavecometoexpectfromthisproductivewriter—clear,colorfulnarrati
Whyisthestudyimportanttohuman?
Jenise:Ilovepeasandbeansmorethanmostpeople,sotofuisanaturalchoiceforme.MyChinesefriendAnnabellelovesthem
Musicisanimportantwayofexpressingpeople’sfeelingsandemotions.The【C1】______,forinstance,from1960to1969willbe【C
Overtwohundredyearsago,AdamSmithintroducedsomeideaswhichbroughtaboutaworldrevolution.Ifweenjoyahighstandard
随机试题
统领全段描写内容的是哪一句?说明这段场面描写的成功之处。
种群的数量随时间的变化而上下摆动的情况称为_______。
A、 B、 C、 D、 E、 D
A、口服茶碱控释片B、静脉输注甲泼尼龙,雾化吸入β2受体激动剂C、口服泼尼松,短期使用(1周)D、吸入异丙肾上腺素E、使用麻黄碱;下列哮喘病人应采取哪项治疗措施男性,34岁,10年前感冒后发生哮喘,多于夜间发作,服用氨
背景我国西北某新建机场为湿陷性黄土高填方机场,施工过程中发生了以下事件:事件一:为强化施工质量管理,在试验段施工时,进行了湿陷性黄土地基处理及高填方稳定性试验研究。事件二:部分填料被混杂堆放,监理单位责令停工,并要求整改。事件三:在强夯施工时,监理
重点调查是对一些特定的调查对象进行调查,如规模以上工业企业统计等,其组织方式与抽样调查相类似。()
小明在考试时监视自己的速度和时间,这种策略属于()
在最近的一部以17世纪的欧洲为背景的电影中,有男主角自由泳的镜头,而自由泳在20世纪20年代以前的欧洲尚未出现。然而因为看电影的人明显对游泳动作史并不在行,因此对于大多数电影观众来说,这一错误显然不会影响该电影在其他方面所揭示的任何历史真实性。下面哪一项,
当Applet程序中的init()方法为下列代码时,运行后用户界面会出现的情况,以下描述正确的是()。publicvoidinit(){setLayout(newBorderLayout());add("North"
HowtoapproachListeningTestPartTwo•ThispartoftheListeningTesttestsyourunderstandingofnumbers,namesandspelling
最新回复
(
0
)