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人教2003课标版《Using LanguageⅡ》最新PPT课件优质课下载
A British inventor called Alexander Graham Bell invented telephone in 1876
the New Continent
Columbus
Please tell whether the following are
discoveries or inventions.
It’s ___________
a discovery.
Thomas Edison
The electric bulb.
It’s ____________
an invention.
It’s ____________
Stephenson's “Rocket”
an invention.
It’s ___________
a discovery.
DNA
A discovery is something existing
in nature but we don’t know.
An invention is something created by human beings.
Differnece between a discovery and an invention
Applying for a patent
Finding a problem
Doing research
Testing the solution