【单选题】设X 为随机变量,E(X)=2,D(X)=5,则 为 ( )
【单选题】The majority of people around here are ____eople.
【判断题】P eople thought of a dolescence hundreds of years ago .
【单选题】There were a lot p eople in the lecture hall than I expected .
【判断题】The author holds that p eople are not interested in teaching chimpanzees to talk is probably that they will ruin human ’ s conversation by talking improperly with men.
【简答题】P eople don ’ t ___ __ ____ their __ __ _____ is already ______ __ _ when they eat chilies.