The Development of Plastics When rubber was first commercially produced in Europe during the nineteenth century, it rapidly became a very important commodity, particularly in the fields of transportation and electricity. However, during the twentieth century a number of new synthetic materials, called ...
Passage 1:塑料The Development of Plastics 题型:填空7+判断6 参考文章: The History of the Invention of Plastics A Natural polymers include such familiar substances as silk, rubber, and cotton. Plastics are artificial polymers. Plastics are used on a daily basis throughout the world. The word pla...
Passage 1:塑料The Development of Plastics 题型:填空7+判断6 参考文章: The History of the Invention of Plastics A Natural polymers include such familiar substances as silk, rubber, and cotton. Plastics are artificial polymers. Plastics are used on a daily basis throughout the world. The word pla...
The Development of Plastics When rubber was first commercially produced in Europe during the nineteenth century, it rapidly became a very important commodity, particularly in the fields of transportation and electricity. However, during the twentieth century a number of new synthetic materials, called ...
The Development of Plastics When rubber was first commercially produced in Europe during the nineteenth century, it rapidly became a very important commodity, particularly in the fields of transportation and electricity. However, during the twentieth century a number of new synthetic materials, called ...
The great strength of plastic is its indestructibility. However, this quality is also something of a drawback: beaches all over the world, even on the remotest islands, are littered with plastic bottles that nothing can destroy. Nor is it very easy to recycle plastics, as different types ...
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tell us the importance of plastic D.introduce how Baekeland worked What can we conclude from the passage? A. It's lucky for Leo Baekeland to invent the plastic. B.Leo Baekeland brought him the fame and money. c.The development of plastic has a bright future. D.Leo Baekeland has invented...
C. By collecting plastics. D. By protecting the environment.50. What's the purpose of the writer? A. To introduce the development of plastic pollution. B. To show the facts that affect the environment. C. To make people know the importance of waste pickers. D. To call on people to ...
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