数控车床对刀的过程，实质就确定（）。
A、工件坐标系
B、机床坐标
C、其余刀具与基准刀之间的修正量
参考答案：A
,his idea was accepted by all the people at the meeting. [ ]
A. Strange as might it sound
B. As it might sound strange
C. As strange it might sound
D. Strange as it might sound
当硅晶体二极管加上0.3V正向电压时，该晶体二极管相当于（）
A.小阻值电阻
B.阻值很大的电阻
C.内部短路
D.接通的开关
