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3.單項(xiàng)選擇題程序段G00 G01 G02 G03 X50.0Y70.0R30.0F70最終執(zhí)行()指令。

A.G00
B.G01
C.G02
D.G03

4.單項(xiàng)選擇題

如圖所示,刀具起點(diǎn)在(-40,-20),從切向切入到(-20,0)點(diǎn),銑一個(gè)40mm的整圓工件,并切向切出,然后到達(dá)(-40,20)點(diǎn)。根據(jù)示圖中的刀具軌跡判斷,正確的程序是()。

A.……
N010G90G00G41X-20.0Y-20.0D01;
N020G01X-20.0Y0F200.0;
N030G02X-20.0Y0I20.0J0;
N040G01X-20.0Y20;
N050G00G40X-40.0Y20.0
……
B.……
N010G90G00G41X-20.0Y-20.0D01;
N020G01X-20.0Y0D01F200.0;
N030G02X-20.0Y0I-20.0J0;
N040G01X-20.0Y20;
N050G00G40X-40.0Y20.0
……
C.……
N010G90G00X-20.0Y-20;
N020G01X-20.0Y0F200.0;
N030G02X-20.0Y0I-20.0J0;
N040G01X-20.0Y20;
N005G01G00X-20.0Y20.0
……
D.……
N010G90G00X-20.0Y-20.0;
N020G91G01G41X20.0Y0D01F200.0;
N030G02X-20.0Y0I20.0J0;
N040G01X-20.0Y20.0;
N040G01X-20.0Y20.0;
……

5.單項(xiàng)選擇題G02/G03 X_Y_I_J_表示用()編寫的圓弧程序。

A.圓弧終點(diǎn)和圓心
B.半徑和圓弧終點(diǎn)
C.圓心角和圓心
D.圓心角和圓弧終點(diǎn)