问题 单项选择题

μ与σ两个参数可固定的分布是()

A.正态分布

B.标准正态分布

C.偏峰分布

D.t分布

E.F分布

答案

参考答案:A

问答题

如何评价秦始皇(或汉武帝、曹操、孝文帝等等)?

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

单项选择题