This passage is mainly about______.
A. how Louis Pasteur's friend died
B. Louis Pasteur's experience and achievement in curing rabies
C. how Louis Pasteur's arm and leg were disabled
D. Louis Pasteur cured a boy who had been badly bitten by a mad dog
此题为主旨题。本文介绍了科学家巴斯德的经历和他研制狂犬病疫苗成功的轶事。