珩磨不能纠正上道工序留下的( )。
A．粗糙度和形状误差
B．形状误差和位置误差
C．粗糙度和位置误差
参考答案：B
--- Have you moved into the new house?
--- Not yet. The walls ______.
A．were painted
B．were being painted
C．are painted
D．are being painted
简述仪表管理的要求
