This Is Why Traffic Lights Are Red, Yellow, and Green
Ever wondered why blue doesn’t mean go and brown mean stop?1..
The idea that red means stop and green means go has impacted our lives in more ways than just traffic signals. We have been taught from a young age that the color red means danger.2.. But why were those particular colors chosen for traffic lights in the first place? For something we have to look at every day, why couldn’t they have been prettier colors like magenta(紫红) and turquoise (天蓝色)?
It’s important to know that before there were traffic lights for cars, there were traffic signals for trains. At first, railroad companies used red to mean stop, white to mean go, and green to mean caution. As you could imagine, train conductors ran into a few problems with the color white meaning go— 3., with train conductors thinking they were all clear when they really weren’t. Railway companies eventually moved to the color green meaning go, and it’s been that way ever since.
As far as red goes, that’s always been a color that indicated danger, long before cars were even around. Red is the color with the longest wavelength. 4.. The color yellow was used to caution drivers because it has a slightly shorter wavelength than red, but not as short as green.
5.. Employ these driving rules first and know that traffic lights have certainly come a long way.
A. And the color green means it’s OK to move forward
B. Turns out, there’s a perfectly good explanation for it
C. It can be seen from a greater distance than other colors
D. bright white could easily be seen from a distance by us
E. bright white could easily be mistaken for stars at night
F. Why don’t we use blue to mean go and brown mean stop
G. So don’t get mad next time you’re impatiently waiting at a traffic light
高三英语七选五简单题
This Is Why Traffic Lights Are Red, Yellow, and Green
Ever wondered why blue doesn’t mean go and brown mean stop?1..
The idea that red means stop and green means go has impacted our lives in more ways than just traffic signals. We have been taught from a young age that the color red means danger.2.. But why were those particular colors chosen for traffic lights in the first place? For something we have to look at every day, why couldn’t they have been prettier colors like magenta(紫红) and turquoise (天蓝色)?
It’s important to know that before there were traffic lights for cars, there were traffic signals for trains. At first, railroad companies used red to mean stop, white to mean go, and green to mean caution. As you could imagine, train conductors ran into a few problems with the color white meaning go— 3., with train conductors thinking they were all clear when they really weren’t. Railway companies eventually moved to the color green meaning go, and it’s been that way ever since.
As far as red goes, that’s always been a color that indicated danger, long before cars were even around. Red is the color with the longest wavelength. 4.. The color yellow was used to caution drivers because it has a slightly shorter wavelength than red, but not as short as green.
5.. Employ these driving rules first and know that traffic lights have certainly come a long way.
A. And the color green means it’s OK to move forward
B. Turns out, there’s a perfectly good explanation for it
C. It can be seen from a greater distance than other colors
D. bright white could easily be seen from a distance by us
E. bright white could easily be mistaken for stars at night
F. Why don’t we use blue to mean go and brown mean stop
G. So don’t get mad next time you’re impatiently waiting at a traffic light
高三英语七选五简单题查看答案及解析
In the traffic lights,red means "stop",green means "go",and yellow means "hurry": Why those colors, though? Why not blue,purple,and brown?The following are transponded from others WeChat.
●Red is an inherited symbol from railroads
Red symbolizes danger in many cultures,which makes sense,considering it has the longest wavelength of any color,meaning you can see it from a greater distance than other colors.Red has meant "stop" since long before cars existed,with railway signals use of red dating bake to the days when mechanical arms lifted and lowered to indicate whether the rail ahead was clear.So that one's simple.
●Green meant "caution" at first
Green's role in lights has actually changed dramatically over time.Its wavelength is next to (and shorter than) yellow's,meaning it's still easier to see than any color other than red and yellow.Back in the early days of railway lights,green originally meant "caution",while the "all-clear" light was,well,clear or white.Trains,of,course,take an unlimitedly long time to stop,and legend has it that several disastrous collisions happened after an engineer mistook stars in the night horizon for an all-clear.Thus,green became "go",and for a long time,railways used only green and red to signal trains.
●Yellow means "caution" because it's almost as easy to see as red
From the earliest days of motoring up until the mid-1900s,not all stop signs were red-many were yellow, because at night it was all but impossible to see a red stop sign in a poorly lit area.The yellow stop-sign craze began in Detroit in 1915,a city that five years later installed its first electric traffic signal,which happened to include the very first amber traffic light,at the corner of Michigan and Woodward Aves.
1.What are the earliest traffic signals designed for from the passage?
A. Cars. B. Trains.
C. Motorcars. D. Not mentioned.
2.Which statement is true according to the passage?
A. Green means "go" all the time.
B. Red is the easiest color to be noticed.
C. All yellow things need dealing with carefully.
D. All the three colors were once used as "caution".
3.What's the main idea of the passage?
A. What is your favorite color?
B. Why are "Red,Yellow,Green" used as traffic signals?
C. How can we figure out the wavelength of colors?
D. What color can green,yellow and red make?
4.Where is the passage from?
A. A diary. B. A scientific magazine.
C. A newspaper. D. The Internet.
高三英语阅读理解困难题查看答案及解析
The town I live in is about to put cameras at all traffic lights to catch people who run red lights．It 36 me of how many people I’ve seen who take the yellow light as a 37 to go faster．I also can’t understand why people don’t move when the traffic light has turned green．Above all, there are those 38 situations in which someone doesn’t even 39 that the light turns red, and just keeps going．That is why so many 40 happen! All these situations make me 41__ the purpose of traffic lights．
42 , it’s even more frightening to imagine letting people make their own decisions at __43 crossroads．Do the biggest cars get to go first? Who decides who goes next? So I guess I do like the idea of a system to 44 traffic．And I’ll do my best to 45 the traffic rules: to go, to be cautious, and to stop when I’m 46 to．
It occurs to me that my 47 have done much the same for me 48 teaching me how to live．They have given me many 49 lights: to get along well with others, to listen and talk to them, to help others, and to 50 with joy and purpose．They have also given me some red lights 51 my life goes astray（误入歧途）: not to be greedy, to keep my temper, and to control my desires．And there 52 have been some yellow caution lights: to watch how much I drink, to keep control of my behavior, and to 53 school regularly and work hard．
If I obey these rules, my life will be as 54 as it can be．Just as I’m wise to pay attention to the traffic lights when I’m walking across the street, I’m wise to pay attention to the“ 55__ signals” given to me by my parents．
1.A．suggests B．informs C．reminds D．warns
2.A．sight B．signal C．message D．switch
3.A．instant B．exciting C．dangerous D．cautious
4.A．notice B．sense C．remember D．feel
5.A．events B．problems C．situations D．accidents
6.A．think of B．wonder about C．care for D．worry about
7.A．Besides B．Anyway C．Instead D．However
8.A．noisy B．narrow C．crowded D．key
9.A．control B．direct C．improve D．serve
10.A．learn B．obey C．protect D．carry
11.A．supposed B．used C．devoted D．delighted
12.A．teachers B．friends C．leaders D．parents
13.A．in charge of B．in face of C．in terms of D．indanger of
14.A．safe B．green C．beneficial D．helpful
15.A．live B．share C．work D．communicate
16.A．unless B．when C．before D．till
17.A．still B．even C．only D．also
18.A．start B．attend C．leave D．miss
19.A．good B．colorful C．meaningful D．healthy
20.A．traffic B．light C．life D．confidence
高三英语完型填空中等难度题查看答案及解析
A yellow taxi _______ alongside a truck at the traffic lights when an elderly woman was crossing the road.
A．brought up B．took up C．pulled up D．put up
高三英语单项填空中等难度题查看答案及解析
I used to think that roses were ______ red or white, but now I know there are yellow and blue roses.
A.neither B. nor
C. either D. both
高三英语单项填空中等难度题查看答案及解析
What is your favorite color? Do you like yellow, orange and red? 1. ．Do you prefer grey and blue? Then you are probably quiet, shy, and you would rather follow than lead．You tend to be a pessimist(悲观主义者)．At least，this is what psychologists tell us，and they should know, because they have been seriously studying the meaning of color preference，as well as the effect that colors have on human beings．2. ．If you happen to love brown，you did so，as soon as you opened your eyes，or at least as soon as you could see clearly．
3. ．On the one hand，a yellow room makes most people feel more cheerful and more relaxed than a dark green one；and a red dress brings warmth and cheer to the coldest winter day． 4. ．A black bridge over the Thames River, near London．used to be the scene of more suicides(自杀)than any other bridge in the area—until it was repainted green．The number of suicide attempts immediately fell sharply．Perhaps it would have fallen even more if the bridge had been done in pink or baby blue．
5. ．It is self-evident that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or grey．
A．On the other hand，black is depressing．
B．The rooms are painted in different colors as you like．
C．They tell us that we do not choose our favorite color as grow up—we are born with our preference．
D．If you do，you must be an optimist(乐观主义者)，a leader or an active person who enjoys life．
E．Light and bright colors make people not only happier but more active.
F．Life is like a picture or a poem，full of different colors．
G.．Colors do influence our moods—there is no doubt about it
高三英语其他题中等难度题查看答案及解析
What is your favorite color? Do you like yellow, orange and red? 1. ．Do you prefer grey and blue? Then you are probably quiet, shy, and you would rather follow than lead．You tend to be a pessimist（悲观主义者）．At least，this is what psychologists tell us，and they should know, because they have been seriously studying the meaning of color preference，as well as the effect that colors have on human beings．2. ．If you happen to love brown，you did so，as soon as you opened your eyes，or at least as soon as you could see clearly．
3. ．On the one hand，a yellow room makes most people feel more cheerful and more relaxed than a dark green one；and a red dress brings warmth and cheer to the coldest winter day．4. ．A black bridge over the Thames River, near London．used to be the scene of more suicides（自杀）than any other bridge in the area—until it was repainted green．The number of suicide attempts immediately fell sharply．Perhaps it would have fallen even more if the bridge had been done in pink or baby blue．
5. ．It is self-evident that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or grey．
A．On the other hand，black is depressing．
B．The rooms are painted in different colors as you like．
C．They tell us that we do not choose our favorite color as grow up—we are born with our preference．
D．If you do，you must be an optimist（乐观主义者），a leader or an active person who enjoys life．
E．Light and bright colors make people not only happier but more active．
F．Life is like a picture or a poem，full of different colors．
G．Colors do influence our moods—there is no doubt about it
高三英语信息匹配中等难度题查看答案及解析
Drivers must stop when the traffic lights _____ red．
A．turn B．will turn
C．turned D．were turning
高三英语单项填空中等难度题查看答案及解析
According to the latest traffic rules, drivers who run red lights _______ lose six points, double the previous punishment.
A. shall B. may
C. can D. should
高三英语单项填空中等难度题查看答案及解析
What is your favourite colour? Do you like yellow, orange or red? 71 Do you prefer greys and blues? Then you are probably quiet, shy and would rather follow the lead. You tend to be a pessimist. At least, this is what psychologists tell us, and they should know, because they have been seriously studying the meaning of colour preference, as well as the effect that colours have on human beings. 72 If you happen to love brown, you did so, as soon as you opened you eyes, or at least as soon as you could see clearly.
73 A yellow room makes most people feel more cheerful and more relaxed than a dark green one. And a red dress brings warmth and cheer to the saddest winter day. 74 A black bridge over the Thames River, near London, used to be the scene of more suicides than any other bridge in the area——until it was repainted green. The number of suicide attempts immediately fell sharply. Perhaps it would have fallen even more if the bridge had been done in pink or baby blue.
75 It is an established fact that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or grey.
A. On the other hand, black is depressing.
B. They tell us, among other facts, that we do not choose our favourite colour as we growup——we are born with our preference.
C. The rooms are painted in different colors as you like.
D. If you do, you must be an optimist, a leader, an active person who enjoys life, people and excitement
E. Light and bright colours make people not only happier but more active.
F. Life is like a picture or a poem, full of different colors.
G. Colours do influence our moods——there is no doubt about it.
高三英语信息匹配中等难度题查看答案及解析