[38 ~ 39] 글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적절한 곳을 고르시오. 38. For instance, the revolutionary ideas that earned Einstein his Nobel Prize ― concerning the special theory of relativity and the photoelectric effect ― appeared as papers in the Annalen der Physik. In the early stages of modern science, scientists communicated their creative ideas largely by publishing books. ( ① ) This modus operandi is il..