制动器的调整方法分几步进行()
A.1
B.2
C.3
D.4
参考答案:C
调查问卷测量结果的可靠程度是调查问卷的()
A.效度
B.衡度
C.信度
D.真实度
E.真效度
I’m surprised to see you drinking coffee; you______drink tea. [A] used [B] are used to [C] used to