答案：【计分规则】: The differences are needed discussed from two aspects.The first aspect is application: Poisson distribution is usually used to determine the probability of the incidence of the rare diseases. It is used in discrete variables. (1 point)Binomial distribution can be used to describe the probabilities of obtaining different number of events for n independent random experiments, each of them has only two possible outcomes with probabilities of p and 1-p. It is used in discrete variables. (1 point)Normal distribution can describe many natural phenomena and used in continuous variable. (1 point) The second aspect is Parameter：(1) Poisson distribution has only one parameter l.(1 point)(2) Binomial distribution has two parameters n and p.(1 point)(3) Normal distribution has two parameters m ands.(1 point)
