Video Questions:
1) What is a polymer? Give an example.
2) Give an example of a synthetic polymer. What are the advantages and disadvantages of using them?
3) What is spider silk?
4) Why do scientists want to reproduce the properties of spider silk? How could it be used?
5) Give 3 examples of how plastics are used.
6) What is PET? What type of items does recycled PET produce?
大家隨便說，說什麽都好，就是請不要惦惦..................................................................
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