Discovery of natural radioactivity in1986 by Henri Becquerel (france) 3/01/1896 ∽复旦大学上海医学胱肿瘤学糸Discovery of natural radioactivity in1986 by Henri Becquerel (France) 3/01/1896 Fudan University Shanghai Cancer Center 复旦大学上海医学院肿瘤学系