程序段N20 G00 X65.0 Z2.0; N25 G81 X40.0 Z0.0 F0.1;可以用程序段( )代替(华中系统)。 A. (A)N20 G00 X65.0 Z2.0; N25 G81 U-25. Z0.0 F0.1 B. (B)N20 G00 X65.0 Z2.0; N25 G81 X40.0 W-2.0 F0.1 C. (C)N20 G00 X65.0 Z2.0; N25 G81 U-25.0 W-2.0 F0.1 D. (D)N20 G00 X65.0 Z2.0; N25 G81 U0.0 Z0.0 F0.1