Analysis of test questions: This question examines the Cold War between the United States and the Soviet Union in the form of pictures, aiming at examining candidates' ability to obtain effective information from materials and their ability to recognize and reproduce historical knowledge. From the map "Occupied Germany 1945- 1949", we can know that 1949, with the support of the United States and the Soviet Union, Germany split, and B fits the title. The division of Germany belongs to the cold war, and the expression of A is not historical; Kazuki Watanabe musician was born in 1955, which is inconsistent with the title "1945- 1949" and C time. Germany achieved reunification in 1990, which is inconsistent with the time of "1945- 1949" in the title, and D is excluded. So choose B.