首页
登录
职称英语
About ten men in every hundred suffer from color blindness in some way; wom
About ten men in every hundred suffer from color blindness in some way; wom
游客
2024-06-02
13
管理
问题
About ten men in every hundred suffer from color blindness in some way; women are luckier only about one in two hundred is affected in this manner. There are different forms of color 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 difference between blue and green. In rare cases an unlucky man may see everything in shades of green-a strange world indeed.
In certain occupations color 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 light may mean "Danger! Keep back!" You can see what will happen if somebody thinks that red is green! Color 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 colors. There are also millions of "rods" but these are used for seeing when it is nearly dark. They show us shape but not color. Wait until it is dark tonight, and 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 colors. As far as we know, bats and adult owls cannot see colors at all only light and dark shapes. Similarly cats and dogs cannot see colors as well as we can.
Insects can see ultra-violet rays which are invisible to us, and some of them can even see X-rays. The wings of a moth may seem gray and dull to us, but to insects they may appear beautiful, showing colors which we cannot see. Scientists know that there are other colors around us which insects can see but which we cannot see. Some insects have favorite colors. Mosquitoes like blue, but do not like yellow. A red light will not attract insects but a blue lamp will. [br] What might be the reason that a blue lamp will attract insects but a red light won’t according to the passage?
选项
答案
Some insects’ favorite color is blue.
解析
由题干关键词blue lamp和red light可定位原文最后一段,倒数第三句话说Some insects have favorite colors,可以直接得出答案。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3616795.html
相关试题推荐
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway;wom
Howmanypeoplearesufferingfromlabormarketproblems?Thisisoneofth
Howmanypeoplearesufferingfromlabormarketproblems?Thisisoneofth
Howmanypeoplearesufferingfromlabormarketproblems?Thisisoneofth
Howmanypeoplearesufferingfromlabormarketproblems?Thisisoneofth
随机试题
【B1】[br]【B7】A、seriousB、severeC、strictD、harshB单词辨析。severe凶猛的,严重的;serious严肃的
Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReading
外国投资者依法在中国自由贸易试验区外的中国境内其他区域设立演出经纪机构,由省级文
十字板剪切试验可适用于()。A.老粘土 B.饱和软粘土 C.砂土 D
仪表的摩擦力矩越大,产生的误差()。
电路如图a)所示,iL(t)的波形为图b)中的哪个图所示?
A.在P和Q中都做自由落体运动 B.在两个下落过程中的机械能都守恒 C.在P
会计分期是对持续经营假设的有效延续。( )
歌德评价帕格尼尼“在琴弦上展现了火一样的灵魂”。巴黎人为他的琴声陶醉,忘记了当时
某村集体经济组织2018年末未分配收益为8000元。2019年底,该村集体经济组
最新回复
(
0
)