修理工作中常用哪些起重设备?
参考答案:
有千斤顶、倒链滑车、电动吊车(也称行车或天车)。
He left _________with my secretary that he would call again in the afternoon.He said he would keep_________.
A.words;his words
B.word;his word
C.word;word
D.the word;his word
用同一种测验对同一组被试先后施测两次,被试两次测验分数间的相关系数即为()。
A.分半信度
B.重测信度
C.复本信度
D.同质性信度