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3D movies are really exciting to watch. More and more 3D movies are coming to theaters. Some say that 3D TV sets will come into our homes in the near future. 3D technology can make TV and movies more exciting. However, people with eye problems may get headaches if they spend too much time watching 3D movies. Why?
When we look at an object, each eye sees it at a different angle (角度). Our eyes send the two images to our brain, and the brain puts them together. 3D technology uses two film projectors (投影机)。 One projects left-eye-image and the other projects a right-eye-image. 3D glasses allow us to see a different image in each eye. So, when we are watching a 3D movie, our brain can’t put together the images sent to our eyes. The brain needs to work harder at “reading” the images. That makes it easier for people with eye problems to get dizzy (头晕的) or have headaches.
Dr John Hagan, an eye doctor in Kansas City, said if your eyes can’t focus on the same object at once, you will have trouble watching 3D movies.
小题1:What is Avatar?
| A．It’s a kind of 3D projector. | B．It’s a kind of 3D TV set. |
| C．It’s a movie. | D．It’s an animal. |
| A．look more beautiful than usual |
| B．look as if they are coming straight at you |
| C．look as if they are far away from you |
| D．look more strange than usual |
| A．3D computers |
| B．3D projectors |
| C．3D phones |
| D．3D TV sets |
| A．each eye sees the object at the same angle |
| B．each eye sees a different object at the same time |
| C．our brain puts the two different pictures together |
| D．there will be two film projectors in our eyes |
| A．you will see different images in both eyes |
| B．you will see the same images in both eyes |
| C．your brain can’t work at all |
| D．the images can be put together easily by your brain |
Once they were in space, Joe had to go outside to make some repairs. When the repairs were done, he tried to get back inside the spaceship. But the door was locked. He knocked but there was no answer. He knocked again, louder this time, and again no answer came. Then he hit the door as hard as he could and finally a voice said, “Who's there?” “It's me! Who else could it be?” shouted Joe. Sam let him in all right but you can imagine that Joe never asked to go on a trip with Sam again!
（1）.Most of the astronauts were unwilling to go on the trip because ____________.
A.it wasn't exciting enough B.they weren't experienced enough
C.they thought they might be killed D.there was little chance of being selected
（2）.Why were Sam and Joe chosen?
A.The boss wanted them to get more experience.
B.The boss trusted them more than anyone else.
C.They were the last people who wanted to go.
D.They were the only men who offered to go.
（3）.What did Sam and Joe think the trip would be like?
A.It would be exciting. B.It would be long and tiring.
C.There wouldn't be any danger. D.There would be serious problems.
（4）.Joe didn't want to work with Sam again probably because he thought Sam.
A.didn't know how to operate door B.was less experienced than he was
C.didn't know how to do repairs D.was very slow and possibly deaf
（5）.The writer tells the story to ____________.
A.show the dangerous side of the astronauts' life
B.make people laugh
C.show the funny side of the astronauts' life
D.make people think
查看习题详情和答案>>Li Ming is thirteen years old. He lives in the countryside in Shandong Province. Yesterday was his__46__. His parents cooked a nice dinner for him, but the boy said, “I feel sad ___47___my parents are _48__ Guangzhou next week. I don’t want them to go.”
It is the _49_ birthday Li Ming spends with his parents these three years. In the past three years, his parents _50_ in Guangzhou and worked to make money. Next week they will _51_ leave home again.
Li Ming is not the only stay-at-home child. In the countryside of China, there are _52__ 20,000,000 children staying at home without their parents. Stay-at-home children face a lot of problems. Many of _53_ stay with their grandparents. They get less care from parents. They feel _54__. Some of them don’t study well because their parents can’t help them _55_ their lessons.
The Chinese government（政府） now cares about the children very much and is trying to solve（解决）their problems.
46. A. time B. class C. festival D. birthday
47. A. so B. because C .although D. but
48. A. looking for B. waiting for C. leaving for D. coming to
49. A. one B. first C. two D. a second
50. A. stayed B. kept C. played D. had
51. A. get to B. forget to C. have to D. ask to
52. A.less than B. more than C. too many D. much too
53. A. them B. they C. we D. us
54. A. surprised B. unhappy C. interested D. excited
55. A. at B. on C. for D. with
查看习题详情和答案>>
The London Olympic Games are coming soon. This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.
When you watch 3-D movies or TV, you have to wear a special pair of glasses. The 3-D glasses make the people and the things on the screen look like they are in the room with you.
3-D, means having three *dimensions: *width, height and *depth. 3-D technology is based on the way the human brain and eye work. Because the *pupils of a person’s eyes are about 6.5cm apart, when we look at something, each eye sees it from different *angle. Our eyes send the two pictures to our brain, and the brain puts them together. The small difference between the picture from the right eye and the picture from the left eye make us see depth.
While watching 2-D films, we don’t have to wear the special glasses. We see the pictures in two dimensions, each eye get the same information. This is because there is only one way of watching it.
So the aim of 3-D technology is to get a different picture into each eye of the person. It uses two film *projectors. One *projects a left eye picture and the other projects a right eye picture. When we are in the cinema, we can see different pictures in each eye at the same time with the help of the 3-D glasses.
While watching 3-D films, we feel that we are actually in the same environment as the things we are watching. However, some people are against watching 3-D films. One of the reasons is the 3-D glasses makes the screen of the film or TV look darker. It is bad for eyes. What’s more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the pictures.
【小题1】Paragraph 3 mainly tells us __________.
| A．how we see things in 3-D | B．how we watch the Olympic Games |
| C．how 3-D films are made | D．where we watch 3-D films or TV |
| A．no | B．different | C．dark | D．the same |
| A．We don’t have to wear 3-D glasses if we watch games in 3-D on TV. |
| B．The 3-D technology is based on the way the human ear and eye work. |
| C．All the people can have fun watching 3-D movies or TV for a long time. |
| D．3-D glasses make us see different pictures in each eye at the same time. |
| A．they make them more excited or sadder |
| B．3-D glasses make the screen look darker |
| C．3-D films make all people get headaches |
| D．they dislike watching the Olympic Games |