题目内容

下列关于电火花加工特点的叙述中,不正确的是()。

A. 可以加工任何硬、脆、韧、高熔点、高纯度的导电、非导电材料
B. 适于加工小孔、薄壁、窄槽及具有复杂截面的零件
C. 加工中几乎不受热的影响,因此可以减少热影响层,提高加工后的工件质量
D. 由于脉冲参数可调节,因此在同一台机床上可以进行粗、半精、精加工

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