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What is color? Why do some objects look red, others green, others blue?Color is caused by

What is color? Why do some objects look red, others green, others blue?

Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red light. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.

What happens to the colors of light that are not reflected? They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-colored clothes.

Which is the main idea of this passage?

A.Dark-colored clothes are warmer in the sunlight.

B.Objects absorb part of the sunlight.

C.Color is caused by reflected light rays.

D.A red object reflects mostly red light.

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更多“What is color? Why do some obj…”相关的问题
第1题
When we see well, we do not think about our eyes very often. (79) It is only when we canno

When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are.

People who are nearsighted can only see things that are very close to their eyes. Everything else seems blurry (模糊的). Many people who do a lot of close work, such as writing, reading and sewing, become nearsighted. Then they have to wear glasses in order to see distant objects clearly.

People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.

Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people olden became blind. Now, however, it is possible to operate on the cataracts and remove them.

Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself, look at object out of one eye; then look at the same object out of your other eye. You will find the object's relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

We should take good care of our eyes ______.

A.only when we can see well

B.only when we cannot see perfectly

C.even if we can see dell

D.only when we realize how important our eyes are

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第2题
What is your favorite color? Do you like yellow, orange or red? If you do, you must be an
optimist (乐观者), a leader, an active person. Do you prefer grays and blues? Then you are probably quiet, shy and you would rather follow than lead. If you love green, you are strong-minded and determined. At least this is what psychologists (心理学家) tell us. They have been seriously studying the meaning of color preference (爱好), and the effect that colors have on human beings. They tell us that we don't choose our favorite color as we grow up. 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.

A yellow room makes us feel more cheerful and more comfortable than a dark green one. On the other hand, black is depressing. Light and bright colors make people not only happier but more active. It is a fact that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or dark gray.

Remember that you will know your friends and your enemies better when you find out what colors they like and dislike. And don't forget that anyone can guess a lot about your character when you choose a piece of handkerchief.

According to this passage,______.

A.one can choose his color preference

B.one is born with his color preference

C.one's color preference is changeable

D.one has to choose his favorite color as soon as he can see clearly

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第3题
Why is it that some people seem to learn several languages without any effort while fo
r others learn?ing just one foreign language is neither enjoyable nor successful? What makes learning a new language so easy for some and so difficult or others?

We each have our own preferred way of learning as a result of our cultural and educational back?grounds and our personalities. Experts have identi?fied different learning styles.

Visual Learners usually enjoy reading and prefer to see an image of the words they are learn?ing. Auditory Learners on the other hand prefer to learn by listening. They enjoy conversations and talking to others.

Some people like to learn by using their hands to touch objects? while others like to move around and need frequent breaks from sitting at a desk.

There are Analytical Learners meaning they enjoy understanding how the language works. They love studying grammar rules and like to focus on de?tails whereas Global Learners are more interested in communicating their ideas and are not worried about whether what they say is grammatically correct.

In spoken English the Japanese tend to be Re?flective Learners. They think carefully before they speak to ensure their message is accurate. They do not make so many mistakes but their communication is slower. European learners tend to be Impulsive Learners. They speak more fluently and worry about how well they are communicating rather than how many mistakes they are making.

So to do well in a language? you should identi- fy your style. and try to find a class that will teach you the way you want to learn. For example if you are a Reflective Learner you may not do so well in a purely conversational class and as an Auditory Learner you probably don't want to do so much reading. In fact if you are an Auditory Learner you are probably not enjoying yourself right now!

(1)The passage mainly talks about () .

A. the difficult learning styles of some people

B. the easy learning ways of other people

C. the different learning styles of the Japanese

D. the different learning methods of all the people

(2)Which of the following phrases isn't con?nected with the learning style?

A. The way people are taught to learn a language.

B. The place where people are from.

C. The size of people.

D. The kind of person people are.

(3)Visual Learners like to () .

A. see things

B. touch things

C. hear things

D. do things

(4)Auditory Learners like to ().

A. hear things

B. buy things

C. destroy things

D. paint things

(5)Analytical Learners() .

A. are similar to Global Learners

B. never worry about mistakes

C. love to study details

D. do well in conversation

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第4题
What is your favorite color? Do you like yellow, orange, and red? If you do, you must
be an optimist (乐观者), a leader, and an active person who enjoys life, people and excitement.Do you prefer grays and blues? Then you are probably quiet, shy and you would rather follow than lead.You tend to be a pessimist.At least, this is what psychologists (心理学家)tell us, and they should know, because they have been seriously study ing the meaning of color preference, as well as the effect that colors have on human beings.They tell us among other facts, that we do not choose our favorite color as we grow up — we are born with our preference.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.

Color does influence our moods (情绪)― there is no doubt about it.A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress bri ngs warmth and cheer to the saddest winter day.On the other hand, black is depressing.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.

Light and bright colors make people not only happier but also more active.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 gray.

1.The author regards the psychologists'findings as ().

A.groundless

B.doubtful

C.reasonable

D.unusual

2.According to the psycholog ists, a person’s color preference ().

A.is formed as he grows up

B.is acquired through experience

C.is decided by his surroundings

D.is possessed from birth

3.It can be concluded from the passage that bright color lovers tend to be ().

A.quiet

B.active

C.depressive

D.pessimistic

4.The example of the bridge is used to illustrate that ().

A.people tend to kill themselves by jumping from bridges

B.color can affect people’s moods to a great degree

C.the bridge should have been repainted earlier

D.certain color can kill people sometimes

5.The notion that machines painted orange can reduce the risk of accidents ().

A.is a well-accepted fact

B.remains to be proved

C.is an illusion of workers

D.is a good wish of scientists

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第5题
Door-knocking is the most effective way of making face-to-face community contact, but it has become a lost art. With the recent focus on customer privacy, door-knocking seems like an intrusion into ot

Door-knocking is the most effective way of making face-to-face community contact, but it has become a lost art. With the recent focus on customer privacy, door-knocking seems like an intrusion into other people's lives. But those who try it for the first time are usually surprised by the pleasant reception they receive. Here are some suggestions that will help you promote your services face-to-face.

BEFORE YOU GO OUT

Begin with a door hanger

Try leaving a door hanger two days before you go door knocking. It should briefly describe the project and say that someone will be around in person.

Wear an official name tag

Door-knockers should wear name tags with the logo of their organization. The best name tags will also include a color photo and the name of the caller.

Have people knock their own blocks

The easiest way to do door-knocking is to try your local area first. Being a neighbor creates an immediate connection with the person answering the door; after that, everything else is easy.

WHEN YOU GO OUT

When to go and what to do first

The best times to knock are usually Saturdays. On other days, after dinner is ideal. When someone answers the door, smile and introduce yourself. Give the name of your organization and, briefly, the reason for the visit.

State what action the other person should take and the benefits

Tell the person what they need to do and how their actions will benefit themselves and others.

Record contact information on the spot

Record names, addresses, email addresses, phone numbers, and responses to questions on the spot. You won't remember them later!

21. Why does the author say that door-knocking has become a lost art?

A. It is not effective, no one will take this method any more.

B. People focus on privacy increasingly, so door-knocking seems like an intrusion into other people's lives.

C. It is very difficult to do door-knocking, no one knows how to do it now.

22. Which step should be firstly taken when you try door-knocking?

A. Have people knock their own blocks.

B. Wear an official name tag.

C. Leave a door hanger.

23. Which time is not appropriate for door knocking?

A. Saturday afternoon.

B. Monday morning.

C. Thursday evening.

24. Who will receive pleasant reception when they try door-knocking?

A. A stranger who is not living in this community and gives no notice for his/her visit.

B. An offensive acquaintance who comes at any time.

C. A neighbor who does good preparation and has significant project to introduce.

25. What does the underlined phrase “on the spot” mean?

A. without delay.

B. at some place.

C. in a difficult situation.

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第6题
听力原文:M: Good morning! What can I do for you, Madam?W: Good morning! I'm looking for a

听力原文:M: Good morning! What can I do for you, Madam?

W: Good morning! I'm looking for a coat.

M: What color would you like?

W: Could you show me some? I'd like a middle-sized red coat.

M: Sorry. We haven't anything in your size.

W: Do you have a smaller size?

M: I'm sorry. The small size coats have just been sold out. What about the blue one? It looks nice and maybe fits you.

W: Well, may I try it on?

M: Yes, please.

W: It seems nice on me. How much is it?

M: 168 yuan.

W: OK. Here is 170 yuan, please.

M: Your change, please. Thanks.

W: You may keep the change. Good-bye.

M: Thank you ! Good-bye !

What was the woman going to buy?

A.A sweater.

B.A shirt.

C.A coat.

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第7题
阅读下面的文章, 根据文章内容, 完成相应的选择题。(每题 10 分)

Door-Knocking

Door-knocking is the most effective way of making face-to-face community contact, but it has become a lost art. With the recent focus on customer privacy, door-knocking seems like an intrusion into other people' s lives. But those who try it for the first time are usually surprised by the pleasant reception they receive. Here are some suggestions that will help you promote your services face-toface.

BEFORE YOU GO OUT

◆ Begin with a door hanger

Try leaving a door hanger two days before you go door-knocking. It should briefly describe the project and say that someone will be around in person.

◆ Wear an official name tag

Door-knockers should wear name tags with the logo of their organization. The best name tags will also include a color photo and the name of the caller.

◆ Have people knock their own blocks

The easiest way to do door-knocking is to try your local area first. Being a neighbor creates an immediate connection with the person answering the door; after that, everything else is easy.

◆ Find a good excuse to door-knock

A short survey about local concerns or a current project is a good excuse. Figure out responses for various situations. What if the person who answers the door cannot speak English? What if a child answers the door?

WHEN YOU GO OUT

◆ When to go and what to do first

The best times to knock are usually Saturdays. On other days, after dinner is ideal. When someone answers the door, smile and introduce yourself; say you are a volunteer and, if it helps, state where you live. Give the name of your organization and, briefly, the reason for the visit.

◆ State what action the other person should take and the benefits

Tell the person what they need to do and how their actions will benefit themselves and others. If a person hesitates, emphasize benefits you' ve already mentioned and then, if necessary, add further benefits. If a person agrees, follow up immediately. If possible, get a donation,a signature, or a promise.

◆ Record contact information on the spot

Record names, addresses, e-mail addresses, phone numbers, and responses to questions on the spot. You won' t remember them later!

(1)Why does the author say that door-knocking has become a lost art?

A. It is not effective, no one will take this method any more.

B. People focus on privacy increasingly, so door-knocking seems like an intrusion into other people' s lives

C. It is very difficult to do door-knocking, no one knows how to do it now.

(2) Which step should be firstly taken when you try door-knocking?

A. Find a good excuse to door-knock

B. Wear an official name tag

C. Leave a door hanger

(3) What does the underlined phrase “on the spot” mean?

A. without delay

B. at some place

C. in a difficult situation

(4) Which time is not appropriate for door knocking?

A. Saturday afternoon

B. Monday morning.

C. Thursday evening.

(5) Who will receive pleasant reception when they try door-knocking?

A. A stranger who is not living in this community and gives no notice for his/her visit.

B. An offensive acquaintance who comes at any time.

C. A neighbor who does good preparation and has significant project to introduce.

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第8题
听力原文:M: So, you must have a lot of contact with overseas students in your work helping
people coping with daily existence.

W: Sometimes. You know the life of a social worker is not all wonderful and working to help people in their daily life. I have to spend a lot of time pushing paper, and writing reports too. But when I do get out, yeah, I see a lot of foreigners. And sometimes they come in because life in America has just beaten them down and they can't cope financially or emotionally.

M: Really? I would think that they had a good support network in place, especially university students.

W: They do have a network, and a variety of support groups, but these can't meet all of the students' needs. They can't help with paying bills, dealing with American neighbors and customs, fitting in, getting a driver's license, etc. They try, but very often the student has to figure out a lot of this stuff by himself. And if he or she is shy, they don't have the courage to ask other people, even other people from their nationality.

M: So what are some of the things that overseas students struggle with?

W: This might interest you, but they struggle with the food, especially Chinese. You know, they come here knowing that Americans love Chinese food so much. They think that there will be good restaurants with Chinese food that they love. But they get here and they are extremely surprised. Americans enjoy totally different flavors.

M: So what do they do?

W: If they're brave and curious, they look around and test all the restaurants. There is usually at least one restaurant in every town that has almost quality food.

Questions 23 to 25 are based on the conversation you have just heard.

23. In which aspect does the woman help people in her work?

24. Why do people come to the woman for help?

25. How did Chinese students expect the American-made Chinese food before they came to the U.S?

(20)

A.Writing reports for them.

B.Teaching them foreign languages.

C.Helping them deal with daily existence.

D.Introducing work for them.

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第9题
The poverty line is the minimum income that people need for an acceptable standard of
living. People with incomes below the poverty line are considered poor. Economists study the causes of poverty in order to find solutions to the problem.

As the general standard of living in the country rises, the poverty line does, too. Therefore, even with today's relatively high standard of living, about 10 percent of the people in the United States are below the poverty line. However, if these people had stable jobs, they could have an acceptable standard of living. Economists suggest several reasons why poor people do not have jobs.

For one thing, more than half of the poor people in the United States are not qualified to work. Over 40 percent of the poor people are children. By law, children less than 16 years old cannot work in many industries. A large number of poor people are old. Many companies do not hire people over 65 years old, the normal retirement age.

Some poor adults do not look for jobs for a variety of personal reasons: they are sick, they do not have any motivation(动力). they have family problems, or they do notbelieve that they can find a job.

Other poor people look for a job but cannot find one. Many poor adults never went to high school. Therefore, when they look for jobs, they have few skills that they can offer.

At the present time, the government thinks it can reduce poverty in the country in the following ways.

First, if the national economy grows, businesses and industries hire more workers. Some of the poor who are qualified to look for jobs may find employment. Then they will no longer be below the poverty line.

Second, if society invests in the poor, the poor will become more productive. If the government spends money on social programs, education, and training for poor people, the poor will have the skills to offer. Then it is more likely that they can find jobs.

Finally, if the government distributes society's income differently, it raises some poor people above the poverty line. The government collects taxes from the non-poor and gives money to the poor. These payments to the poor are called welfare. In 1975 over 18 million people in the United States received welfare.

Some economists are looking for better solutions to the poverty problem. However, at the present time, many people depend on welfare for a minimally acceptable standard of living.

1.The author's main purpose to write this article is()

A、to define what the poverty line is

B、to explain why some people live the poverty line

C、to find solutions to the problem of poverty

D、to show sympathy for those poor people

2.Which of the following is NOT true?()

A、Ten percent of the Americans live a poor life.

B、Poor people are those who love below the poverty line.

C、The poverty line rises as the general standard of living rises.

D、The poverty line tends to be at the same level.

3.More than 40 percent of the poor people are children. This is mainly because ().

A、they do not have enough motivation

B、they are so young that they are deprived of chances to work

C、they fail to get enough education

D、they are very poor in health

4.Most of the American poor people are not qualified for employment because().

A、they to not have any motivation to work

B、they are not very self-confident

C、they are too young or too old to work

D、they have physical and family problems

5.We may conclude from the passage that().

A、better solutions to the poverty problem are not yet found

B、welfare will enable people to be rich

C、poor people are bound to go out of the poverty line if they have chances to do business

D、employment is the best solution to the poverty problem

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第10题
Most musicians agree that the best violins(小提琴) were made in Cremona, Italy, about 200y

Most musicians agree that the best violins(小提琴) were made in Cremona, Italy, about 200years ago. They even sound better than violins made today. Violin makers and scientists try to makeinstruments(乐器)like the Italian violins,however,they are not the same. Why are these old Italianviolins so special? No one really knows. But many people think they have an answer.

Some people think it is the age of the violins. But there is a problem here. Not all old violins sound wonderful. Only the old violins from Cremona are special. So age cannot be the answer.

Other people think the secret to those violins is the wood. It must be from certain kinds of trees.It must not be too young or too old. Perhaps the violin makers of Cremona knew something specialabout wood for violins.

But the kind of wood may not be so important. It may be more important to cut the wood in aspecial way. Wood for a violin must be cut into the right size and shape. The smallest difference willchange the sund of the violin. Musicians sometimes think that this is the secret of the Italians.

Size and shape may not be the answer either. Scientists make new violins that are exactly the same size and shape. But the new ones still do not sound as good as the old ones. Some scientiststhink the secret may be the varnish (清漆).It makes the wood look shiny, but it also helps the soundof the instrument. Since no one knows what the Italian violin makers used in their varnish, no one canmake the same varnish today.

There may never be other violins like the violins of Cremona. And there are not many of the old violins left. So these old violins from Cremona become more and more precious. What would be the best title for the text?

A.The Secrets of Cremona Violins.

B.The History of Cremona Violins.

C.The Making of Italian Violins.

D.The Studies of Italian Violins.

What is still not clear about Cremona violins?A.The shape

B.The wood

C.The size

D.The varnish

Which of the following Words can best describe Cremona violins?A.Light

B.Shining

C.Valuable

D.Modern

请帮忙给出每个问题的正确答案和分析,谢谢!

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