在心理学研究中,有计划地严格控制或创设条件去主动引起或改变被试的心理活动,从而进行分析研究的方法,这叫()。
计算行列式=()
个人试着设身处地地去扮演另一个在实际生活情景中不属于自己角色的行动过程,从而形成角色所需要的某些经验和行为习惯,这一方法是()
哥德巴赫猜想(奇数情形) :任何不小于7的奇数都可以写成()个质数的和.
设随机变量X与Y相互独立,且X~B(16,0.5),Y服从参数为9的泊松分布,则D(X-2Y+3)=()
有一些长3厘米,宽1厘米的长方形纸片,至少需要()张这样的纸片才能拼成一个正方形.
With the publication of( ),Theodore Dreiser was launching himself upon a long career that would ultimately make him one of the most significant American writers of the school later known as literary naturalism.
从研究类型上分,对数据进行统计分析属于()。
设函数f(x)=ln(3x),则'f(2)=()
With such a poor score in the entrance exam, it’s ________ impossible for him to be admitted to this university.