【单选题】Before combinedthe data from independent studiesfor a Meta analysis, it should be performed
【单选题】Meta-analysis made which development in the study of leadership possible? (3.2)
A.
isolating studies to separate out the results for the most important one
B.
comparing results of many studies to formulate better theories about leadership traits
C.
showing that a leader in one situation may not be a leader in another
D.
introducing the concepts of focus on people and focus on results
E.
observing the changes a leader needed to make to become a Great Man
【多选题】The description of Meta-analysis is correct
A.
Categorical variable data can choose OR, RR, RD as the combined effect
B.
Fixed effect models can eliminate the causes of heterogeneity
C.
For numerical variable data, the standardized mean difference can be used as the combined effect
D.
The random effects model can eliminate the causes of heterogeneity
【简答题】教育的生物起源论认为,教育产生于儿童对成人的无意识地模仿。( )
【多选题】高低压同杆架设,在低压带电线路上工作时,应( )。
【简答题】高低压同杆架设,在低压线路工作时,工作人员与最上层高压带电导线的垂直距离不得小于()。