常用来表示研究工具的稳定性大小的指标是 【 】
A.重测信度
B.折半信度
C.cronbach'ɑ系数
D.KR 20值
正确答案是A
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Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
The team has been training hard in ( )(prepare)for the 2004 Olympic Games.