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选修8《Warming up、Pre-reading、Reading、Comprehending》最新PPT课件优质课下载
1) A discovery is
A discovery merely makes known something that already exist in nature, such as the discovery on the New Continent by Columbia.
2) An invention is
An invention is something that created by human being, such as the lighting rod.
What are the important inventions of the 20th century? Which do you think is the most important one?
Thomas Edison invented the electric bulb.
Did Edison invent electricity? Can electricity be invented? Is electricity an invention or discovery? Why?
Give your examples of each category and fill in the blanks. Work out the connections between them.
Discoveries
Inventions
1. Electricity
1. Systems of delivering electrical light and heating to homes and offices
2. Household machines for washing, ironing, keeping food cold, etc.
3. Computers, telephones, television, etc.
Discoveries
Inventions
2. The movement of air
1. Airplane jet engines
2. Air balloons, etc
Machines to help people with serious disease (like kidney failure)
3. The circulation of the blood
Discoveries
Inventions
4. X-rays
Body scanners to see whether you are ill