Answer Choices
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.
Optical Effects
______
______
Mechanical Effects
______
______
______
第1题
A.How Mars compares to other planets in the solar system
B.Who built the network of canals on the surface of Mars
C.Whether signs of water indicate that life has existed on Mars
D.How soon astronauts from Earth will be able to go to Mars
第2题
A.ancient writings
B.photographic images
C.Martian soil samples
D.data sent by spacecraft
第3题
A.direct proof that life has existed on Mars
B.the rejection of Schiaparelli's ideas by other scientists
C.the search for canals on other planets in the solar system
D.new questions about intelligent life on Mars
第4题
A.A network of canals on the surface
B.Ancient islands in a dry streambed
C.Water vapor lines on a photographic plate
D.Volcanic cones near the planet's North Pole
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!