3D comes home Have you had this experien

问题：

3D comes home

Have you had this experience? You are watching a movie. A man is shooting on the screen. The picture is so real that you think he is shooting at you. Or a car is speeding on the screen and at one point you are afraid it will hit you.

Three-dimensional (3D)films use special technology to make pictures seem more real and exciting than two-dimensional ones. Two popular movies in the cinema this year, UP and Ice Age; Dawn of the Dinosaurs both use 3D technology.

So far we can only see 3D films in the cinema with a special screen and projector. But soon, we will be able to watch them in our living rooms. Last month, the Japanese company Sony told reporters that it plans to bring 3D televisions to homes in 2010. The company is also hoping to make other products with 3D, like laptops and PS3.

“      The 3D train is on the track, and we are ready to drive it home,” said Sony President Sir Howard Stringer.

How 3D technology works

Three dimensional movies and TV programs are fun to watch, but do you know how they are made? It is much easier to understand if we do an experiment.

Hold one of your fingers up at arms length and close one eye. Then try closing the other eye. As you switch between open eyes you should see your finger “jumping” left and right against the background.

This happens because our two eyes are about 4 cm away from each other. The separation causes each eye to see the world from a different angle. The brain puts these two views together. What you see becomes three-dimensional.

Three dimensional movies are made using two video cameras at the same time, which creates two different images. When the movie plays in a cinema, two projectors put the two images on the screen. With a pair of 3D glasses, the two images are separated and each image only enters one eye. Your brain puts the two pictures back together, and the pictures on the screen become three-dimensional.

72. What does the sentence “The 3D train is on the track, and we are ready to drive it home” mean?           .

A. They’ve got a train to take 3D films back home

B. They are ready to bring 3D technology to homes

C. They have no more work to do on 3D technology

D. They are not sure about the future of 3D films

73. According to the text, 3D films       .

A. use advanced technology to make special sound effects.

B. are less real than ordinary films, but more exciting.

C. can only be seen in the cinema at the moment.

D. will take the place of 2D films in the near future.

74. From the text, we know that 3D technology        .

A. works in a similar way to how our eyes see things.

B. is too expensive to be used in ordinary homes.

C. uses special video cameras and light effects

D. can be easy to experiment with

75. The passage is mainly about        .

A. how 3D films will develop in the future.    

B. what makes 3D films so enjoyable

C. how 3D technology works and its future

D. what 3D technology needs and its future