单选题 “stock diameter is 25mm”的含义是( )。

单选题 数控系统中CNC的中文含义是( )。

单选题 The program zero is( )。

单选题 FMS是指( )。

单选题 The machine zero is( )。

单选题 Spindle moevement is primarily along the( )axis。

单选题 During turning operation , the coolant should be directed to the ( )。

单选题 When maching cast iron, which of the following coolants should be used:( )。