Film cameras and digital cameras work in a similar way.
Film cameras
After all, a film camera is basically a light – proof (不透光的) box. It has a lens (镜头) system to focus light onto the film at the back of the camera.
Let’s suppose that we are outside on a beautiful summer day trying to take a picture of the family dog. We are using a film camera. We finally get the dog to lie still. You point the camera at him. What happens? Light goes into the camera lens and hits the shutter. In other words, nothing happens yet. Now let’s say that the dog looks really cute and you decide to snap a picture. What happens? When you press the button, the shutter opens for a very short period of time. A small amount of light passes through and hits the film at the back of the camera. This creates an upside-down and reversed (反向的)image on the film.
When you finish the roll of the film, you can take it to the photo shop to develop it and you will have a great picture of your dog!
Cameras come with different lens lengths. Why does it matter? Many small cameras have shorter focal lengths, which means that there is a small distance between the lens and the place where the light focuses at the back of the camera. This gives you a large view of the area you are taking a picture of. Lenses with a long focal length show a smaller area but allow you to focus on distant objects and make them bigger. They are often called telephoto lenses. A good example of a long focus lens is one that is used by sports photographers to get photos of football players as if they were standing right beside them.
Digital cameras
In digital cameras, the light falls not on film but onto a sensor (传感器) called a CCD (Charge Coupled Device). This digitally converts(转变) light and color into a digital information or pixels (象素). The CCD is the heart of any digital camera and usually the most expensive part ---- depending on how good it is.Which of the following statements is TRUE?
A.Both digital and film cameras focus light onto the film. |
B.All cameras have a sensor. |
C.Digital cameras and film cameras have something in common. . |
D.Small cameras usually have longer focal lengths. |
In the “Film cameras” part, you fail to take the picture of the dog because _____.
A.light goes into the camera lens and hits the shutter |
B.you haven’t aimed the camera at the dog |
C.the image of the dog is not created |
D.the sensor fails to convert light and color into a digital information |
The main reason that sports photographers can get clear and big photos of players is that ____.
A.they use digital cameras | B.the lens of their cameras is excellent |
C.their focus lenses are short | D.their focus lenses are long |
Generally speaking, a digital camera’s price is ____.
A.closely related to the quality of the CCD |
B.irrelevant to the quality of the CCD |
C.closely related to the lens |
D.irrelevant to the lens |
In 1883, an imaginative engineer named John Roebling decided to build a spectacular bridge connecting New York with Long Island. However, bridge building experts throughout the world thought that this was a pipe dream. It was not practical. It had never been done before.
But Roebling refused to listen to them. He thought about the bridge day and night and he knew deep in his heart that it could be done. After much discussion and persuasion he convinced his son Washington, who was a promising engineer himself, that the bridge in fact could be built.
Working together for the first time, the father and son developed concepts of how it could be accomplished. With great excitement, they hired their crew and began to build their dream bridge.
The project started well, but several months after it began, a tragic accid
ent on the site took the life of John Roebling. Washington was so seriously injured that he was never able to walk, talk or even move again.
"We told them so", "Crazy men and their crazy dreams", "It's foolish to chase wild visions", the critics said and most thought the project should be scrapped since the Roeblings were the only ones who knew how the bridge could be built. In spite of his handicap Washington still had a burning desire to complete the bridge and his mind was still as sharp as ever.
Washington's wife tried to inspire and pass on her husband's enthusiasm to some of his friends, but they were too daunted by the task. As he lay in his hospital room, an idea suddenly hit him. All he could do was move one finger and he decided to make the best use of it. By moving this finger and tapping it on his wife's arm, he slowly developed a code to communicate with her. Then he used this method to tell his wife what the engineers should do. It seemed crazy but the project was
under way again. For 13 years Washington tapped out his instructions with his finger on his wife's arm, until the bridge was finally completed.
Today the spectacular Brooklyn Bridge stands in all its glory as a tribute to the triumph of one man's spirit and his determination not to be defeated by circumstances.
_ What did most people think about Roebling's idea to build the bridge?
A.It would never become a reality. | B.Washington was not experienced enough. |
C.It would take a lot of time. | D.Finding the money would be impossible. |
_The underlined word `daunted' (para. 6) is closest in meaning to '______'.
A.unpleasant | B.scared | C.amazed | D.determined |
_ Which of the following shows the correct order of the events that happened in the story?
a. Roebling convinced his son.
b. Washington found a new way to communicate.
c. They hired the crew.
d. The bridge was completed.
e. Roebling wanted to build a bridge.
f. There was a tragic accident.
A.e,![]() |
B.e, a, f, b, c, d | C.e, f, a, b, c, d | D.e, a, c, f, b, d |
_ What can we learn about Washington's wife?
A.She knew sign language very well. |
B.She was devoted to her husband. |
C.She developed a code to communicate with her husband. |
D.She helped her husband design the plan. |
_ What does the story tell us?
A.Success will come with the passing of time. |
B.Struggle![]() |
C.Even the most distant dream can be realised with a never-say-die attitude. |
D.The people who make a difference in our life should be remembered forever. |
Football is, I believe, the most popular game in England: one has only to go to the important matches to see this. Rich and poor, young and old, one can see them all there, shouting for one side or the other.
To a stranger, one of the most surprising things about football in England is the great knowledge of the game which even the smallest boy seems to have. He can tell you the names of the players in most of the important teams. He will tell you who he expects will win such a match, and his opinion is usually as good as that of men three or four times his age.
Most schools in England take football seriously-much more seriously than nearly all European schools, where lessons are all very important and games are left for the children themselves. In England it is believed that education is not only a matter filling a boy’s mind with facts in the classroom: education also means the training of character; and one of the best ways of training character is by means of games, especially team games; where a boy or girl has to learn to work with others for his or her team, instead of working for oneself alone. The school therefore plans games and matches for its students. Football is a good team game. It is good both for the body and the mind. That’s why it is every school’s game in England.In passage 1, by “this” the author means ________.
A.people often go to football games. |
B.people, rich and poor, young and old, play football |
C.football is the most popular game in England |
D.people usually shout at each other in a football match |
In England, a boy’s opinion of a match is often ________.
A.three or four times better than that of adults | B.more than that of adults |
C.as good as that of adults | D.worth considering three or four times than adults |
In England, education means_______.
A.filling a boy’s mind with stories | B.more than the teaching of knowledge |
C.the teaching of knowledge only | D.training character by means of football games |
People tend to become more personal and hide less of themselves when using email . Researchers from Open University in Britain have found in a recent study that there are good reasons for this .
The team of researchers asked 83 pairs of students , all strangers to each other , to solve a problem . They had to discuss this question : If only five people in the world could be saved from a world disaster , who should they be ? The pairs of students had to talk over the problem either face to face or by computers . Dr. Johnson said , “They told their partners four times as much about themselves when they talked over the Internet as when they talked face to face . When the computers were fitted with cameras so that students could see each other , this limited the personal side of the conversation.”
Generally the information was not extremely personal . It was mainly about things such as where they went to school, or where they used to live . But some students discussed their love stories , and personal childhood experiences .
Dr. Johnson believes that emailing encourages people to focus on themselves . And when they do this , they become more open , especially if there are no cameras. “If you cannot see the other person, it becomes easier to talk about yourself . This is because you are not thinking what the other person is thinking of you. So emailing has become the modern way of talking,” said Dr. Johnson. However , this style of talking is not entirely new . “In the 19th century people started to use the ‘telegraph’ to communicate . Now the same kind of thing has happened and people ended up speaking more freely .”
Dr. Johnson thinks that emailers need to know about these effects of emailing , especially when they start work in a company . “If you don’t know about it , you could find yourself saying more about yourself than you wanted to .”The subject discussed in this passage is .
A.how people open up when emailing | B.how people do research studies |
C.how to communicate at work | D.how to discuss and solve a problem |
The reason that some couples talked freely about themselves is that .
A.they didn’t talk about very personal things | B.they couldn’t see each other |
C.the cameras on the computers were turned on | D.they had to discuss a question |
What do the underlined words (in para. 4) refer to ?
A.The telegraph | B.The computer | C.Emailing . | D.Face-to-face talk . |
.In the writer’s opinion , one should .
A.focus on oneself when emailing | B.talk more freely in email than usual |
C.discuss any subject that one wants to | D.consider how one uses email at work |
Probably you have seen photos of the Grand Canyon(峡谷), the great valley in the desert country of Arizona. But you must go there yourself to feel its true size and beauty. The Grand Canyon is one of the greatest natural wonders of the world
The Colorado River formed the Grand Canyon over millions of years. Slowly, the river cut down through hard rock. At the same time, the land was rising. Today the canyon is 1.5 kilometers and 445 kilometers long. The oldest rocks at the bottom of the canyon are more than 1 billion years old. The width varies from about 200 meters to 29 kilometers across. The rim or top of the canyon is about 2,300 meters above sea level on the South Rim, and about 3,000 meters on the other side. As a result, there are different kinds of plants and animals on opposite sides of the canyon. The South Rim is dry desert country. The North Rim has tall forests.
The canyon looks different at different times of day, and in different seasons and weather. At sunrise and sunset the red, gold, brown and orange colors of the rocks are especially clear and bright. In winter, the canyon is partly covered with snow.
The view from the South Rim of the Grand Canyon is the best. Most visitors come here and stay in campgrounds or hotels. Every point along the canyon’s edge offers a different view.
The North rim of the Canyon is quieter. It takes all day to drive there from the South Rim because there is only one bridge across the Colorado River. On the way, you go through Navado Indian lands, and a colorful pink desert called “The Painted Desert”.The best way to feel the true beauty of the Grand Canyon is to________.
A.see its photographs | B.listen to the report about it |
C.watch its introduction on TV | D.go there yourself and visit it |
The scene of the canyon is ________.
A.various depending on different time and places |
B.almost the same |
C.various depending on different time |
D.various depending on different places |
If you want to visit the North Rim from the South Rim, you________.
A.can go there in many direction | B.won’t spend much time on the way |
C.can visit The Painted Desert on the way | D.needn’t go across any bridges |
If you want to have a visit to the Grand Canyon, you’d better go to _______.
A.the North Rim | B.the South Rim | C.the bottom | D.Navado Indian Lands |
Have you ever wondered why you sometimes take an almost immediate liking to a person you have just met? We often get the first impression of a people based on the color of a person’s skin or the manner in which he or she dressed. Meaning is conveyed not only by words or verbal languages but also by nonverbal communication systems, such as body behaviors.
Nonverbal communication is important because we use the actions of others to learn about their affective emotional states .Our emotions are reflected in our posture, face, and eyes—be it fear, joy, anger, or sadness—so we can express them without ever saying a word .For this reason, most of us rely heavily on what we learn through our eyes.
Nonverbal communication is significant in human interaction because it is usually responsible for the first impressions. More importantly, those first messages usually influence the perception(感知) of everything else that follows. Even how we select friends and sexual partners is grounded in first impressions with nonverbal communication.
Nonverbal communication is important because it is culture-related. It is based on different beliefs, religions, values and customs in different cultures. When, where, how, and to whom people display his or her specific nonverbal behaviors is greatly affected by culture and context. Culture determines what the appropriate nonverbal behavior is. For example, feelings of friendship exist everywhere but their expression varies. It may be appropriate in some countries for man to embrace each other and for women to hold hands; in other countries these displays of affection may be shocking. Each culture has its own specific interpretation on nonverbal communication. What is acceptable in one culture may be completely unacceptable in another. One culture may determine that snapping fingers to call a waiter is acceptable; another may consider this gesture rude. What is the best title of the passage ?
A.Nonverbal communication and first impression | B.Nonverbal communication is culture-related |
C.Nonverbal and verbal communication | D.The importance of nonverbal communication |
We can know a person’s feeling through our eyes because_________.
A.we can see a person’s feeling on his face |
B.a person’s emotions can be reflected through eyes |
C.a person’s feeling can be reflected through his body languages |
D.we can see a person’s feeling through his posture |
Which of the following statements is not True ?
A.Meaning can be conveyed both by words and body language. |
B.We can use nonverbal communication to learn about a person’s emotional states. |
C.We often get the first impression by what a person says. |
D.The first impression can affect what we will do in the following. |
What can we conclude from the last paragraph ?
A.we can use different ways to express friendship. |
B.each culture has its own specific interpretation on nonverbal communication. |
C.snapping fingers to call a waiter is acceptable. |
D.learning a country’s culture is very important. |