【单选题】下列哪个不是点估计的特点( )
D.
可以对统计量与总体参数的接近程度给出一个概率度量
【判断题】Universal facial expressions do exist, but cultural norms often dictate how, when, and to whom facial expressions are displayed.
【单选题】OR 值准确估计RR值的条件不包括下列哪一个?
【简答题】An experiment with people from Papua New Guinea (prove) _______ that some facial expressions are universal.
【单选题】Charles Darwins The Expression of the Emotions in Man and Animals proposed that facial expressions might
A.
act as a simple tool of cross-cultural communication.
B.
get people ready to the changes of circumstances.
C.
be difficult to understand in different cultures.
D.
equip people with the knowledge of other species.
【单选题】Which one does not belong to six universal facial expressions?