单项选择题 社会评估的目的不包括以下哪项 A、文化 B、角色与角色适应不良 C、认知 D、环境情况 E、家庭因素

单项选择题 The technical basis for the management of construction projects on the network platform is (    )

单项选择题 As the number of degrees of freedom for a t distribution increases, the difference between the t distribution and the standard normal distribution A、becomes larger B、becomes smaller C、stays the same D、None of these alternatives is correct.