21번 문제 지문
지문 분석결과
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2022년 3월 고3 전국연합학력평가
2022년 3월 고3 전국연합학력평가
지문 전체 문장
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21번 문제 지문
Thomas Edison's name is synonymous with invention, and his most famous invention, the electric light bulb, is a familiar symbol for that flash of inspired genius traditionally associated with the inventive act. Besides being the exemplar of the "bright idea," however, Edison's electric light is worthy of study for other reasons. The technical and economic importance of the light and of the electrical system that surrounded it matches that of any other invention we could name, at least from the last two hundred years. The introduction and spread of electric light and power was one of the key steps in the transformation of the world from an industrial age, characterized by iron and coal and steam, to a post-industrial one, in which electricity was joined by petroleum, light metals and alloys, and internal combustion engines to give the twentieth century its distinctive form and character. Our own time still largely carries the stamp of this age, however dazzled we may be by the electronic, computerized, and media wonders of the twenty-first century.
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