1 Film is an illusion because the moving pictures seen on the screen are not moving at all. A fihn is actually a series of tiny still pictures, or flames. They appear to be moving because the retina of the human eye retains the impression of an object for a split second after that object has actually disappeared. This principle is known as the persistence of vision. When we look at a single frame of film, the image persists in the brain's visual center for a fraction of a second. Then, the next frame comes along and the brain has to catch up with the new image. Thus, our eyes and brain trick us into thinking that we see a smoothly moving image rather than a series of still ones.
2 Another illusion of film is known collectively as special effects, the tricks and techniques that filmmakers use when makeup, costume, and stunts are still not enough to make a scene convincing. Special effects artists apply science to filmmaking, showing us things that no plain camera could ever photograph. Even since the introduction of computer graphics in recent decades, the films of today still rely on some special effects that have existed since the early years of cinema.
3 One category of special effects is called optical or visual effects, tricks made with the camera. One of the pioneers of optical effects was the French filmmaker Georges Méliès, who invented a technique called stop-motion photography. With this technique, a scene is filmed, the camera is stopped, the scene is changed in some way, and then the camera rolls again. Stop motion photography can create th.e illusion of an actor disappearing on screen. In one short film, an actor's clothes keep returning to his body as he tries to get undressed. Méliès also invented a technique known as split screen. By putting a card over the camera lens, he prevented half of the frame of fihn from being exposed. He filmed a scene on the uncovered half of the frame and then backed up the same strip of fihn in his camera. For the second shot, he covered the exposed half and took another series of pictures on the half that had been covered the first time. With the technique of split screen, it is possible to achieve illusions such as having the same actor play twins.
4 Mechanical effects are another category of special effects. Mechanical effects are objects or devices used during the filming to create an illusion, such as feathers or plastic chips to simulate snow, and wires to create the illusion that people are flying. Many sound effects are mechanical effects. Wood blocks create a horse's hoofbeats, and a vibrating sheet of metal sounds like thunder. During the silent film era, the music machine called the Kinematophone was popular because it could produce the sounds of sirens, sleigh bells, gunfire, baby cries, and kisses-all at the press of a key.
5 Other mechanical effects are puppets, robots of all sizes, and tiny copies of buildings or cities. To reduce the cost of studio sets or location photography, special-effects technicians create painted or projected backgrounds, which replace the set or add to it. For example, in a long shot of a town, the set might be only a few feet high, and the remainder of the town is painted onto a sheet of glass positioned in fiont of the camera during filming. In a 1916 silent film called The Flying Torpedo, mechanical effects created the appearance of an enemy invasion of the California seacoast. Technicians threw small contact-rigged explosives into toy cities, scattering the tiny buildings into the air. An artist painted a row of battleships on a board that was only six feet long. Carpenters drilled small holes in the ships, which were filled with small charges of flash powder to simulate guns. An electrician wired the charges so they could be fired on cue from a small battery. For audiences of the time, the effect was of a real fleet of ships firing on the California coast.
6 Sometimes optical and mechanical effects are used together. For the original 1933 version of King Kong, the filmmakers wanted to show the giant ape climbing the Empire State Building in New York City. To show Kong's climb, the special-effects technicians built a tiny movable model of the ape and a proportionately small model of the Empire State Building. Then, stop-motion photography was used to create the illusion that Kong was moving up the building.

单选题 Why does the author discuss the principle of persistence of vision in paragraph 1?
A To introduce a discussion of human vision
B To explain how we remember images
C To support the idea that film is an illusion
D To compare two types of special effects

单选题 The phrase catch up with in paragraph 1 is closest in meaning to
A．hurry to process
B．put aside
C．search for
D．obtain from memory

单选题 The author primarily defines special effects as
A．phenomena that cannot be explained logically
B．techniques and devices to create illusions in film
C．sounds and images that cause an emotional response
D．methods used by filmmakers of the silent film era

单选题 The word rolls in paragraph 3 is closest in meaning to
A．changes
B．operates
C．breaks
D．reverses

单选题 The word simulate in paragraph 4 is closest in meaning to
A．make it easier to film
B．put on top of
C．improve the texture of
D．create the appearance of

单选题 It can be inferred from paragraph 4 that silent fihns
A．were projected by a machine called the Kinematophone
B．relied more on special effects than on acting ability
C．used sound effects to make scenes more convincing
D．are still very popular with movie audiences today

单选题 All of the following would necessarily involve mechanical effects EXCEPT
A．using wires to make objects fly
B．fihning each half of a frame separately
C．hitting a sheet of metal to create thunder
D．building a small model of a town

单选题 Which sentence below best expresses the essential information in the highlighted sentence in paragraph 5? Incorrect choices change the meaning in important ways or leave out essential information.
A．The most effective way to lower the cost of a fihn is to replace location photograph3 with studio sets or backgrounds.
B．Special effects technicians build painted or projected backgrounds that appear more realistic than location photography.
C．One way to reduce costs is to repaint old studio sets and use them again; this also adds to the number of available sets.
D．Painted and projected backgrounds are special effects that improve or replace sets, thus making filming less expensive.

单选题 The word which in paragraph 5 refers to
A．carpenters
B．holes
C．ships
D．guns

单选题 What point does the author make in paragraph 6 about the 1933 film King Kong?
A．The film combined two different types of special effects.
B．The filmmakers trained a giant ape to climb up a building.
C．Stop-motion photography was invented during the filming.
D．King Kong remains very popular with audiences today.

单选题 Look at the four squares, , , , and , which indicate where the following sentence could be added to the passage. Where would the sentence best fit?
In another example, an actor appears to take off his head and place it on a table,
One category of special effects is called optical or visual effects, tricks made with the camera. One of the pioneers of optical effects was the French filmmaker Georges Méliès, who invented a technique called stop-motion photography. With this technique, a scene is filmed, the camera is stopped, the scene is changed in some way, and then the camera rolls again. Stop-motion photography can create the illusion of an actor disappearing on screen. In one short film, an actor's clothes keep returning to his body as he tries to get undressed. Méliès also invented a technique known as split screen. By putting a card over the camera lens, he prevented half of the frame of film from being exposed. He filmed a scene on the uncovered half of the frame and then backed up the same strip of film in his camera. For the second shot, he covered the exposed half and took another series of pictures on the half that had been covered the first time. With the technique of split screen, it is possible to achieve illusions such as having the same actor play twins.
Ａ. Square Ａ.
Ｂ. Square Ｂ.
Ｃ. Square Ｃ.
Ｄ. Square Ｄ.

填空题 Select the appropriate sentences from the answer choices and match them to the category of special effects that they describe. TWO of the answer choices will NOT be used. This question is worth 3 points.

How to Score 3-Point Questions
Answers Correct	Points Earned
5	3
4	2
3	1
0-2	0

A．Objects and devices are used during filming to create an illusion.
B．The eye retains the image of an object after the object has actually disappeared.
C．Tricks of the camera produce images of things that are not real.
D．Puppets, robots, explosives, and small models are examples of these effects.
E．Stop-motion photography makes an actor disappear on screen.
F．A computer program makes one object appear to change into another.
G．They created the illusion of ships attacking a town in a 1916 silent film.

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