下列不属于加工误差的是：（）
A.视觉误差
B.定位误差
C.安装误差
D.对刀误差
参考答案：A
______ disappointed us most was that the guide was always asking us to leave ____ we thought very interesting.
A．It; where
B．What; what
C．What; where
D．It; what
格里高利圣咏的形成和特征
