题目内容
When you watch a movie in the cinema, you may wonder how “the moving pictures” is made and where the voices, and noises and music come from. Now here is the answer.
In modern times, the middle part of a cinema film has lots of small photographs, each one of which is different from the one before it. Each photograph is brought in front of a strong light, and there it stops for a very small part of a second. This photograph, therefore, appears on the screen, and we see it. Then the light is covered and the next photograph is moved to the position in the front of the strong light. Meanwhile, the metal cover turns away from the light. Thus, the second photograph is shown on the screen. This is done again and again, twenty-four times a second, and we think we are watching a moving picture on the screen. But nothing on the screen actually moves. ”The moving picture” is in fact made up of a lot of bits. We see about 86,000 different pictures every hour, but none of them moves.
The voices, noises and music are recorded on the side of the cinema film. The record looks like marks of strange shapes. The side of the film passes in front of another light, and the rays of light which pass through change as the marks change. These marks have been made from the voices and other sounds of the people and events in front of the cinema when the film is being made. The marks may be considered as “printed sounds”.
1. When a cinema film is shown, how long does each photograph appear on the screen?
A. One twenty-third of a second.
B. One twenty-fourth of a second
C. A few seconds
D. One thirty-fifth of a second.
2. Why can we see pictures moving on the screen?
A. We see about 86,000 different pictures every hour.
B. Each picture is a little different from the former.
C. Photographs change quickly.
D. Both B and C.
3. What is a cinema film made up of?
A. Small photographs and a strong light.
B. Small photographs and the sounds.
C. A lot of bits.
D. Voices and photographs.
4. Which is the true about the sound record?
A. It sounds strange.
B. It looks as irregular marks.
C. It is printed in the middle of a film.
D. It is made while the film is being shown on the screen.
B
D
C
B
【解析】略
寒假学与练系列答案
|
阅读下面短文，根据以下要求：1）汉语提示；2）首字母提示；3）语境提示, 在每个空格内填入一个适当的英语单词，所填单词要求意义准确、拼写正确
Do you like friends who can teach you a lot every day ? Books are
s friends because they bring knowledge to us and keep us 76. company through our life. They are so （有价值）that libraries 77.
are built to (存放) them . Almost all great men are lovers 78.
of books.Franklin said that it was books that l him to success 79.
and that he could have achieved nothing w books .Books are the 80.
holders of mankind's ( 经验 ) and imagination .They enable 81.
us to see through the past and predict the .So when you open 82.
a book , you would get into a world you have never been 83.
before . A good book is a good teacher that h you to get 84.
over difficulties .No matter what you are, or old , poor 85.
or rich , books are your devoted friends .Love books and love life .