文档介绍：Unit2
Ⅰ. Objectives
Ⅱ. Background Information
Ⅲ. Class Presentation
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This unit tells about people who invented new things and helped the development of our society. In the Listening and Speaking section, you will learn how to offer help and express willingness to help. In the Reading and Writing section, Text A tells the story of the blind young man who invented the Braille system; Text B tells how tomatoes e part of the American diet; and Practical Reading includes the copyright page of a book.
grasp the basic skills necessary to offer help and express
willingness to help;
2. understand the main ideas of Texts A, B and C, and master
the useful sentence structures and words and expressions
found in the relevant exercises of the first two texts;
3. know how to use the present progressive and the past
progressive;
4. know how to fill in a book order form;
5. understand the difference between the general idea and the
details contained in an English paragraph.
Ⅰ. Objectives
After studying this unit, the students are expected to be able to
Obj.
Ⅱ. Background Information
Some Famous Inventions
BI
Some Famous Discoveries
BI-inventions1
Some Famous Inventions
Invention Year Inventor
Papermaking(造纸术) 105AD Cai Lun
Compass (指南针) 3rd century AD unknown
Gunpowder(***) 8th century AD unknown
Printing from movable
type(活字印刷术)
1045AD Bi Sheng
Dynamite(炸药) 1867 Alfred Nobel
Telephone(电话) 1876
Alexander Graham Bell
BI-inventions1
Some Famous Inventions
Invention Year Inventor
Incandescent lamp(白炽灯) 1879
Thomas A. Edison
Airplane (飞机) 1903 the Wright brothers
Computer(计算机) 1936 Konrad Zuse
Microwave oven(微波炉) 1947 Percy L. Spencer
Credit card(信用卡) 1950 Frank McNamara
Artificial satellite(人造卫星) 1957 the former Soviet Union
Cell phone (手机) 1973 Dr. Martin Cooper
BI-inventions2
Stanely Cohen and Herbert Boyer
Invention Year Inventor
The World Wide
Web(万维网)
The technique of DNA cloning(DNA克隆技术)
1973
1989-1991
Ti