下列属于单一固定循环的指令有( )
A. G02
B. G03
C. G94
D. G71
数控车床中可正确实现换刀的指令( )
A. S315 T03 M06
B. T0101 M06
C. S200 T0202 M08
D. S315 M06 T01
主轴停转指令是( )。
A. M30
B. M03
C. M04
D. M05
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