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 |
The other day, my friend Jane was invited to a 40th birthday party. The time printed on the invitation was 7.30pm. Jane went off with her husband, expecting a merry evening of wine, food, and song.
By 9.45, everybody was having great fun, but no food had appeared. Jane and David were restless. Other guests began whispering that they, too, were starving. But no one wanted to leave, just in case some food was about to appear. By 11.00, there was still no food, and everyone was completely off their heads. Jane and David left hungry and angry.
Their experience suggests that the words on the printed invitations need to be made clearer. Everyone reads and understands the invitations differently. Most of us would agree that 6.30-8.30pm means drinks only, go out to dinner afterwards; 8.00pm or 8.30pm means possible dinner, but 9.30pm and any time thereafter means no food, eat beforehand, roll up late.
But this is not always the case. If asked to a students' party at 6.30pm, it is normal for guests not to appear before midnight, if at all, and no one cares. Being the first to arrive-looking eager-is social death. When my mother is asked to a party for 6.30, she likes to be there, if not on time, then no later than seven. My age group（late thirties） falls somewhere between the two, but because we still think we're young, we're probably closer to student-time than grown-up time.
The accepted custom at present is confusing(混乱的), sometimes annoying, and it often means you may go home hungry, but it does lend every party that precious element(成分) of surprise.The underlined words "off their heads" probably mean______.
| A．tired | B．crazy |
| C．curious | D．hopeless |
Jane and David' s story is used to show that______ .
| A．petty-goer8 usually get hungry at parties |
| B．party invitations can be confusing |
| C．people should ask for food at parties |
| D．birthday parties for middle-aged people are dull |
For some young people, arriving on time for a students' party will probably be considered_______.
| A．very difficult |
| B．particularly thoughtful |
| C．friendly and polite |
| D．socially unacceptable |
According to the writer, people in their late thirties_______.
| A．are likely to arrive late for a party |
| B．care little about the party time |
| C．haven' t really grown up yet |
| D．like surprises at parties |
What is the general idea of the text?
| A．It' s safe to arrive late just when food is served. |
| B．It' s wise to eat something before going to a party. |
| C．It' s important to follow social rules of party-going. |
| D．It' s necessary to read invitations carefully. |
“I’ve changed my mind. I wanted to have a telescope, but now I want my dad back.” Lucien Lawrence’s letter to Father Christmas written after his schoolteacher father had been knifed to death outside his school gate, must have touched every heart. Lucien went on to say that without his father he couldn’t see the stars in the sky. When those whom we love depart from us, we cannot see the stars for a while.
But Lucien, the stars are still there, and one day, when you are older and your tears have gone, you will see them again. And, in a strange way, I expect that you will find your father is there too, in your mind and in your heart. I find that my parents, long dead now, still figure in many of my dreams and that I think of them perhaps more than I ever did when they were alive. I still live to please them and I’m still surprised by their reactions. I remember that when I became a professor, I was so proud, or rather so pleased with myself, that I couldn’t wait to cable my parents. The reply was a long time in coming, but when it did, all mother said was “I hope this means that now you will have more time for the children!” I haven’t forgotten. The values of my parents still live on.
It makes me pause and think about how I will live on in the hearts and minds of my children and of those for whom I care. Would I have been as ready as Philip Lawrence have been to face the aggressors (挑衅者), and to lay down my life for those in my care? How many people would want me back for Christmas? It’s a serious thought, one to give me pause.
I pray silently, sometimes, in the dead of night, that ancient cry of a poet “Deliver my soul from the sword, and my darling from the power of the dog.” Yet I know the death comes to us all, and sometimes comes suddenly. We must therefore plan to live forever, but live as if we will die tomorrow. We live on, I’m sure, in the lives of those we loved, and therefore we ought to have a care for what they will remember and what they will treasure. If more parents knew this in their hearts to be true, there might be fewer knives on our streets today.According to the whole text we can see that the first paragraph_____.
| A．puts forward the subject of the text |
| B．shows the author’s pity on the kid |
| C．acts as an introduction to the discussion |
| D．makes a clear statement of the author’s views |
In the second paragraph the author mainly wants to explain to us____.
| A．how much he misses his parents now |
| B．why his parents often appear in his dreams |
| C．when Lucien will get over all his sadness |
| D．how proud he was when he succeeded in life |
What feeling did the author’s mother express in her reply?
| A．Proud | B．Happy |
| C．Disappointed | D．Worried |
In the author’s opinion, the value of a person’s life is________.
| A．to leave behind a precious memory to the people related |
| B．to have a high sense of duty to the whole society |
| C．to care what others will remember and treasure |
| D．to share happiness and sadness with his family |
What does the writer mean by the sentence taken from an old poem________?
| A．Call on criminals and murderers to lay down their guns. |
| B．Advise parents stay with their children safely at home. |
| C．Spend every day meaningfully in memory of the death. |
| D．Try to keep violence and murder far away from society. |
Christian Eijkman, a Dutch doctor, left the Netherlands for the island of Java. Many people on the island had a disease called beri-beri. He was going there to try and find a cure. At first, Eijkman thought some kind of germ (细菌) caused beri-beri. He raised some chickens. He didn’t eat them, but made experiments on them. The local people were quite surprised at that. One day he noticed that his chickens became sick when they were fed the food most Javanese ate-refined white rice (精炼米). When he fed them with unrefined rice, also known as brown rice, they recovered.
Eijkman realized that he had made an important discovery-that some things in food could prevent disease. These things were named vitamins (维生素). The Javanese were not getting enough vitamins because they had actually removed the part that contains vitamins. Later, other diseases were also found to be caused by the lack of vitamins in a person’s food.
Today many people know the importance of vitamins and they make sure they have enough vitamins from the food they eat. If they don’t, they can also take vitamin pills.The underlined word “cure” in Para 1 probably means ______.
| A．a medical treatment | B．a kind of vitamin |
| C．a kind of germ | D．a kind of rice |
Christian Eijkman went to the island of Java to ______.
| A．spend his holiday |
| B．find ways to grow better crops |
| C．do some research about the island |
| D．help the Javanese with their illness |
Why did Christian Eijkman raise some chickens?
| A．To eat them. |
| B．To carry out his experiments. |
| C．To give the Javanese a surprise. |
| D．To make money by selling them. |
If a person doesn’t get enough vitamins in his diet, he’d better _____.
| A．eat more rice | B．eat more meat |
| C．eat some chicken | D．eat vitamin pills |
We can learn from the passage that ______.
| A．Beri was caused by chickens |
| B．the Javanese didn’t like vitamins |
| C．Christian Eijkman’s experiment was successful |
| D．the Javanese’s disease was caused by a kind of germ |
Public speaking is a common cause of stress for everyone. The idea of standing in front of a large group with all eyes on you can make you feel fearful in almost all kinds of situation, for example giving a presentation in class, proposing a toast at dinner or making a work-related presentation. It seems to be a fear that’s impossible to overcome. If you have ever experienced this, you know while the anxiety may develop at the actual event, it is a feeling that begins much earlier than the actual day. There are many ways you can work on your confidence and prepare yourself for a public speaking event.
A consultant specializing (专门研究) in presentation skills can help you to overcome your sense of panic. Working with a consultant does not indicate that you have a major problem; it is only an approach to receiving guidance on relaxation strategies, such as deep breathing, which can help you deal with public speaking problems with ease.
Consultants can also help you work on your confidence. Confidence is extremely important in public speaking as it lets a speaker sound more convincing. Even well-established public speakers practice techniques such as meditation (沉思冥想) to calm themselves before a public appearance.
It’s well worth the time and effort to overcome the fear of public speaking, particularly if talks and presentations are part of your work description. Keep in mind that many of those around you are also struggling with this fear of public speaking. It will help you to become an able speaker if you can prepare beforehand. For example, you can put in time on planning your presentation in detail and practicing it many times in secret. As you get more and more familiar with your material, you’ll be able to fine-tune (微调) the details of your presentation and this will make you a confident speaker. Your speech will become excellent in terms of style and content.
Remember that the more you get into this pattern of feeling good about yourself, the stronger you will feel about approaching events when you have to make a speech. You can also work on physical details such as adjusting your tone (音调) before the presentation by doing some warm-up exercises.
In a word, believing in yourself and presenting yourself well can help you deeply impress your audience. And after a few speeches you’ll notice yourself overcoming the sense of panic that you now feel in public speaking situations.
| Title |
About the fear of public speaking |
|
| Introduction |
* When speaking in public, you will feel * This feeling usually begins |
|
| Ways |
Turn to a consultant. |
* A consultant can guide you and help you ( * A consultant can also help you build confidence which can make your public speaking |
| Make |
* Make a detailed * Spend time * Pay attention to your tone. |
|
| A combination of great confidence and a good |
In high school, “cool” is the rule, so teenagers will do anything to avoid possibly embarrassing situations.
But not Samantha Elton, 15. She seeks them out. And if she can make a fool of herself as in the process, well, that’s even better.
For the past two years, Elton, has been a practitioner of improvisation, doing things that others would be embarrassed to consider.
Elton is a member of High School Jesters, a group that teaches improvisation techniques to students. The group was founded two years ago by Nicholas Kopatich, himself a keen improviser.
“I was sitting in my dorm room and some friends were having chats about comedy and improvisation,” Kopatich recalls. They asked for lessons after Kopatich told them he had improvisation experience. The small group turned out to be pretty good at it, so they did a show for the dorm. And things snowballed.
While even her mother marvels at Elton’s ability to get up in front of audience without a script to fall back on, the teen enjoys such opportunities. Performing improvisation comes with a certain freedom that theater doesn’t provide.
“What I like about it the most is that I don’t have to be a certain character or a certain way, and because of that I can’t get anything wrong,” Elton says, “I get to write the story while I’m doing it.”
Monica Elton, Samantha’s mom, thinks the workshops are a valuable outlet that a lot of students may not get in their schools. High school kids don’t usually like to act silly or look uncool, she says, but improvisation teaches them that it’s OK to have flaws.
“I like to think we give kids positively that allows them to gain confidence,” says Brent Mukai, a High School Jesters instructor. The great thing about improvisation is that it is an art form that is open to anyone. But there’s more to it than getting up in front of audience and telling jokes or acting silly.
“You don’t need to be the most amazing actress to be an improviser,” Samantha Elton says, “It’s really a place where I can show people my creativity. I can paint pictures for people and entertain others.”
It’s really free.What do we know about improvisation?
| A．Performers act as a certain character. |
| B．Performers need a script to act on. |
| C．Performers intend to make audience embarrassed. |
| D．Performers develop the story as they are playing. |
According to Monica, practicing improvisation made Elton _______.
| A．treat flaws as normal things |
| B．accept cool as the rule |
| C．avoid doing embarrassing things |
| D．care about what others comment on her |
It can be inferred that Kopatich formed High School Jesters _______.
| A．on purpose | B．by accident |
| C．for business | D．out of curiosity |
The passage mainly tells us that ________.
| A．teens make a fool of themselves |
| B．teens perform improvisation to be cool |
| C．teens express creativity through arts |
| D．teens gain confidence in the improvisation |