2006年辽宁地区高一英语Unit16Scientistsatwork课件
日期：2010-11-08 11:06
the sheep，Unit 16
Scientists at work
By Frank
Ancient Greece static electricity
1745Leyden jar
1880Electrical bulb (Edison)
Television
Computer
1989World-wide web
Human embryos cloned
Dolly， the first cloned animal
A list of some important，
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