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【单选题】
空运行是数控机床必备的基本功能,效验程序。关于空运行,正确的描述有( )请从下列组合中选择正确的一组1空运行时刀具不进行实际切削2空运行可以检查程序中的语法错误3空运行可以加工路径正确与否4空运行可以检查零件的加工精度5空运行时刀具移动的速度与程序设定的 F值无关
A.
①+②+③+⑤
B.
①+②+③+④
C.
②+③+④+⑤
D.
①+②+④+⑤
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A.
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B.
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A.
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B.
错误
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A.
正确
B.
错误
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