True (T) or False (F)． (1)Percy Spencer discovered microwaves by mistake.(　　) (2)Einstein was at work when he thought of the equation “E＝ mc2”． (　　) (3)The person who discovered penicillin was Alexander Fleming. (　　) (4)Fleming had been studying bacteria in his laboratory when the discovery happened. (　　) (5)During the Second World War, Fleming's discovery helped to cure plenty of people. (　　) 答案：(1)～(5)　TFTFT