某测验的分半信度是0.63，则原测验的信度是多少
参考答案：r=2rhh/(1+rhh)=2×0.63/1.63=0.77 原测验的信度是0.77。
Not in the mood for talking, he kept his friends _______.
A．in the distance
B．far away
C．at a distance
D．a distance away
土壤地球化学测量的应用
