Lead-in:

1._ ________ plays an important role in exploring the unknown fields and realizing the dreams of our ancestors（祖先）.

2.High technology has a direct effect on our life.

What electrical and electronic appliances(电器) do you have at home?

How have these electrical and electronic devices improved our lives?

Make a group of four and talk about their functions.

Device How to improve our life(functions) TV cellphone refrigerator washing machine air-condition microwave oven computer MP3/MP4 U-disk

Timeline

1982 electric fan

1984 TV(black-and-white)

1985 refrigerator

1986 washing machine

1990 TV(colour)

1997 air-condition

2001 mobile phone(with basic functions)

2004 mobile phone(with MP3 and camera)

With people's hard work and intelligence, human beings own lots of useful and handy electric and electronic devices.These devices do make us save a lot of time and energy.Besides, they free us from heavy housework.

But we should not depend completely on them.We human beings should make reasonable use of them so that we can relax ourselves and find pleasure and happiness in our life.

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