单项选择题

A.G81 X60.0 Y80.0 Z-13.5 R3.0 F60
B.G81 X60.0 Y80.0 Z10.0 R6 F60
C.G83 X60.0 Y80.0 Z-10.0 R3.0 F60
D.G85 X60.0 Y80.0 Z-10.0 R6 F60