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  3. George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analy

George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analy

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问题     George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products.
    The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials, and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. An authority on plant diseases-especially of the fungus variety--carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.
Why does the author mention Thomas Edison’s offer to Carver?
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答案To illustrate(show)one of Carver’s many opportunities
解析 根据短文内容可知，卡弗得到来自各方面的主动帮助。有的出钱，有的出物，有的出试验室，要卡弗去发挥他的聪明才智，但他都一一拒绝。最终接受了美国政府提供给他的一次机会。作者为了说明他的机会很多，特意将大发明家爱迪生也搬了出来，用以烘托出卡弗执着的追求。
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