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 ...
as different types of plastic are often used in the same items and call for different treatments. Plastics can be made biodegradable by incorporating into their structure a material such as starch, which is attacked by bacteria and causes the plastic to fall apart. Other materials can be incorpo...
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 ...
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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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While Baekeland had been busily amassing dollars, some advances had been made in the development of plastics. The years 1899 and 1900 had seen the patenting of the first semi-synthetic thermosetting material that could be manufactured on an industrial scale. In purely scientific terms, Baekeland'...