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Let’s talk.
What are they?
What do you think of them?
invention 发明
bamboo
bone
silk
stone
We use stone,bamboo,bone and silk to write.
Science can give us more great inventions.
Do you love inventions?
Do you love Science?
Inventions can change people’s life.
invention:paper
Bi Sheng
毕昇
Cai Lun
蔡伦
inventor：Bell
CaiLun and Bell are ____________.
Paper and the telephone are _________________.
inventors
inventions
1. paper, can, invent, CaiLun. 2.Bell ,the,can ,telephone,invent.
CaiLun can invent paper.
Bell can invent the telephone.
inventor
invent
invention
发明者，发明家