完形填空
话题 | 体裁 | 词数 | 难度 | 建议用时 |
3D技术 | 说明文 | 245 | ★★★ | 5分钟 |
The 30th Olympic Games took place in London from July to August in 2012. Luckily, Chinese 1 fans could watch the exciting games in 3D on TV.
When you watch 3D movies or TV, you have to wear a(n) 2 pair of glasses. The 3D glasses make the pictures from the screen 3they are there in the room with you.
3D means having three dimensions(维度): width, height and depth. 3D technology is similar to the way that the human brain and eyes work. 4 the pupils(瞳孔) of a person's eyes are about 6. 5 cm apart, when we look at something, each eye sees it from a different angle (角度). Our eyes 5 the two pictures to our brain, and the brain puts them together. The small 6 between the picture from the right eye and the picture from the left eye allows us to see depth(立体感).
When we 7 pictures in two dimensions, each eye gets the same information. That is because the picture has no real depth, and there is only one way of looking at it. A 3D movie or TV needs two film projectors(放映机). One projects a left eye picture and the other projects a right eye picture. The 3D glasses allow us to see 8picture in each eye.
While one 93D films, he feels that he is actually in the same environment as the things he's watching. 10 , it also has its disadvantages. People with eye problems may get headaches if they spend too much time watching 3D movies.
